Search

Coastal areas are subject to the joint risk associated with rainfall‐driven flooding and storm surge hazards. To capture this dependency and the compound nature of these hazards, bivariate modelling represents a straightforward and easy‐to‐implement approach that relies on observational records. Most existing applications focus on a single tide gauge–rain gauge/streamgauge combination, limiting the applicability of bivariate modelling to develop high‐resolution space–time design events that can be used to quantify the dynamic, that is, varying in space and time, compound flood hazard in coastal basins. Moreover, there is a need to recognize that not all extreme events always come from a single population, but can reflect a mixture of different generating mechanisms. Therefore, this paper describes an empirical approach to develop design storms with high‐resolution in space and time (i.e., ~5 km and hourly) for different joint annual exceedance probabilities. We also stratify extreme rainfall and storm surge events depending on whether they were caused by tropical cyclones (TCs) or not. We find that there are significant differences between the TC and non‐TC populations, with very different dependence structures that are missed if we treat all the events as coming from a single population. While we apply this methodology to one basin near Houston, Texas, our approach is general enough to make it applicable for any coastal basin exposed to compounding flood hazards from storm surge and rainfall‐induced flooding. [ABSTRACT FROM AUTHOR]

Research has illustrated how homeless service organizations have adjusted policies and services during the COVID-19 pandemic and how frontline workers have taken on the work of implementing new procedures, fine-tuning service strategies, and navigating challenges. This qualitative study sought to describe how the pandemic has impacted the day-to-day service provision experiences of homeless service workers to gain insight into how the sector might prepare itself for the next COVID-19 wave, next pandemic, or other crisis. Drawing on interviews conducted with 21 frontline workers across Texas in fall of 2021, findings highlight the challenges of shifting to remote work and virtual service provision, reduced client engagement and rapport building, creating and enforcing health policies, and persistent service system disruptions. Recommendations include investing time and resources into creating more nimble work systems, moving away from paper-based processes, and making telehealth strategies a permanent part of homeless service provision. Additionally, there are research opportunities to develop and test coworker peer support models and to study the value and viability of tele-health in this sector, including worker and client perspectives of these technologies. Findings underscore how the pandemic disrupted homeless service design and delivery, which in turn hampered service access, use, and engagement. [ABSTRACT FROM AUTHOR]

During the COVID-19 pandemic, governments around the world grappled with how to protect their citizens from disease. Governments had to carefully balance the tension between individual rights and public health measures, while also considering which level of government was best situated to act. This paper, focusing on the response to COVID-19 in Texas, discusses the constitutionality of quarantines by balancing individual rights and public health. This paper also discusses how quarantine authority is shared among local, state, and federal levels of government in Texas. Finally, this paper analyzes some of the early actions taken in response to the COVID-19 pandemic. [ABSTRACT FROM AUTHOR]

Geoenvironmental models were formulated by the U.S. Geological Survey in the 1990s to describe potential environmental effects of extracting different types of ore deposits in different geologic and climatic regions. This paper presents a geoenvironmental model for roll-front (roll-type) uranium deposits in the Texas Coastal Plain. The model reviews descriptive and quantitative information derived from environmental studies and existing databases to depict existing conditions and potential environmental concerns associated with mining this deposit type. This geoenvironmental model describes how features of the deposits including host rock; ore and gangue mineralogy; geologic, hydrologic, and climatic settings; and mining methods (legacy open-pit and in situ recovery [ISR]) influence potential environmental effects from mining. Element concentrations in soil and water are compared to regulatory thresholds to depict ambient surface water and groundwater conditions. Although most open-pit operations in this region have been reclaimed, concerns remain about groundwater quality at three of the four former mills that supported former open-pit mines and are undergoing closure activities. The primary environmental concerns with ISR mining are (1) radon gas at active ISR operations, (2) radiation or contaminant leakage during production and transport of ISR resin or yellowcake, (3) uranium excursions into groundwater surrounding active ISR operations, and (4) contamination of groundwater after ISR mining. Although existing regulations attempt to address these concerns, some problems remain. Researchers suggest that reactive transport modeling and a better understanding of geology, stratigraphy, and geochemistry of ISR production areas could minimize excursions into surrounding aquifers and improve results of groundwater restoration. [ABSTRACT FROM AUTHOR]

Institutional practices and conditions at community colleges can improve rates of transfer, as can access to transfer student capital. However, we know little about how institutions attempt to build students' transfer capital, or about students' experiences within community colleges as they accumulate transfer capital. In this paper, we examine how students' institutional experiences, particularly their engagement with student supports at community colleges and transfer destinations, influence their understanding of, and ability to navigate, the transfer process. We view the accumulation of transfer student capital as an interactionist model between the students and their institution, where students' transfer knowledge and success is conditioned by an interaction between their background and institutional conditions. We draw on longitudinal qualitative interview data with transfer-intending community college students over the course of 3 years to understand how students access, receive, and accumulate transfer capital as they work toward their educational goals. By leveraging student experiences, our study can inform community colleges and transfer destinations about practices and policies interpreted as most effective from the perspective of students. Our work also connects to broader conversations about how institutions reproduce, ameliorate, or exacerbate inequalities based on student background. [ABSTRACT FROM AUTHOR]

This paper theorizes historical marker texts (HMT) as succinct, public facing informational reports that reinforce white supremacy and minimize or erase the memory of Black, Indigenous, and people of color (BIPOC) individuals. In this layered content and discourse analysis, I evaluate the demographics of the commissioners at the local and state level, the instructions for the HMT application, and the text of a selected group of HMTs. [ABSTRACT FROM AUTHOR]

As our environment becomes increasingly urban, the governance of urban regions faces multifaceted challenges. There is growing recognition that studying the governance of urban regions requires looking beyond individual plans and examining networks of plans. Existing work on plan networks focuses on documents, neglecting the agency of the people and governments who create and implement the plans. To help fill this gap, we develop and test an analytical framework for assessing urban governance within a network of plans, focusing on the alignment of plan content, interactions, and the relative efficacy of the plans. We apply this framework in metropolitan Austin, Texas (USA), studying five strategic plans that address the region's built environments, transportation systems, and natural areas over a 20 year-period. The analysis reveals how voluntary regional scenario-planning conducted decades earlier continues to shape city and regional development goals; how alignment between plans on paper can belie poor cross-jurisdictional coordination in practice; and how plans addressing transportation and natural areas are more efficacious for implementation than plans for the built environment. In addition to making plan dynamics visible, the framework thus allows for rigorous, empirical assessment of regional governance through a network of plans. • A framework is proposed to analyze urban-region governance with a network of plans. • The framework is tested with five strategic plans in Austin, Texas (USA). • Evidence is found of a network consisting of documents and agency. • Network-of-plan research benefits from the framework. [ABSTRACT FROM AUTHOR]

This paper explores the relationship between the stock of interstate highways on employment growth of counties in Texas between 1983 and 2012. Using the Chernozhukov-Hansen instrumental variables quantile regression (IVQR) method, we examine the heterogeneous impact that highways have on employment growth at different quantiles of the conditional distribution while at the same time controlling for potential endogeneity. The results show that the employment growth effect monotonically increases as one shifts from the lower tail to the upper tail of the distribution. The range is 0.15 to 0.44, with the highest at the 95th quantile, compared to 0.189 for OLS and 0.213 for 2SLS. A 10 percent increase in interstate highway kilometers in 1983 led to about a 1.5 to 4.4 percentage point increase in county employment over a 29-year period. Our results also indicate that the counties with low initial levels of employment grew faster than those with a high initial level of employment and that this convergence monotonically decreases from the lower tail to the upper tail of the growth distribution. [ABSTRACT FROM AUTHOR]

As the craft beer industry has experienced significant growth around the world and particularly in the U.S., research into various aspects of the topic has grown as well. Significant attention has been given to the relationship between craft beer and neolocalism, resulting in three key themes: neolocalism as a driver of demand for the craft beer product, the use of place-based themes by craft brewers to engender neolocalism, and neolocalism as a driver of demand for the craft brewery experience. This paper seeks to examine the extent to which brewery visitors are consuming the local through the themes of product, place, and experience as discussed in the literature. It uses directed content analysis to examine online visitor reviews posted on TripAdvisor and RateBeer for microbreweries in the five largest urban areas in the U.S. state of Texas (Houston, San Antonio, Dallas, Austin, and Fort Worth). Findings show that both the craft beer product and craft brewery experience are significant to brewery visitors. In particular, the opportunity for meaningful social interaction in the brewery experience offers a means of fulfiling neolocal desires for establishing local connections. [ABSTRACT FROM AUTHOR]

Citizen science (CS) programs often question what motivates their volunteers and how volunteer participation can be sustained. Using a case study of citizen scientist volunteers (CSVs) who monitor water quality in Texas, I apply here a novel approach--the Dispositional-Organizational Interactions Framework (DOIF)--that provides a nuanced understanding of CSVs. The DOIF allows for consideration of how dispositional variables, such as sociodemographic characteristics and motivations for participation, may relate to organizational variables (e.g., program efficacy, results, and recognition); both overarching variables relate to indicators of commitment. The purpose of this study is to examine interactions among different aspects of a CS program and CSVs--observations that can improve CSV satisfaction and possibly retention. In a community geography partnership, volunteers of a statewide CS program were surveyed (n = 327). Results of exploratory factor analyses and a series of nonparametric tests indicate the DOIF offers insights into five major motivational factors; it uncovers between-group differences in how CSVs value organizational variables and indicate a commitment to volunteerism. This study contributes to the broader literature by incorporating the role of the organization in assessments of motivations through the creation of a novel framework and through empirical findings. The paper considers implications of results for CS programs and practice, then concludes with suggestions for future research. [ABSTRACT FROM AUTHOR]

The natural complexity, heterogeneity, and extent of transboundary aquifers around the world, have led to controversy over which method or criteria should be used to identify and delineate their boundaries. Currently, there is no standard methodology that aquifer‐sharing countries can use to delineate the area of a transboundary aquifer. In the case of Mexico and Texas, Mexico uses administrative boundaries, whereas Texas uses geological boundaries. This paper proposes a method for delineation and prioritization of aquifers (or aquifer areas) called effective transboundary aquifer areas (ETAAs), which uses a combination of physical criteria (geological boundaries, topography, and hydrography) and the location and density of active water wells in the borderland between Mexico and Texas. This method identifies the area of priority (productivity area) in the aquifer using pumping patterns or hot spots regardless of the aquifer's surficial geological limits, therefore offering a more effective, local and practical management option at the transboundary level. Different geological features or pumping patterns will have different sizes and locations of ETAAs within the same aquifer. In West Texas, which is dominated by bolsons, the method produces limited options for ETAAs, whereas in South Texas in the easternmost border the identified ETAAs are more significant. Research Impact Statement: The effective transboundary aquifer areas approach is an alternative way to identify the priority area of an aquifer using pumping hot spots for a simpler and local‐based transboundary groundwater management scenario. [ABSTRACT FROM AUTHOR]

This paper discusses the historical archaeology of migration in the American Southwest. I raise three points for consideration. First, the archaeology of migration in the Southwest following Spanish colonialism has been relatively absent, but is a rich area of inquiry for historical archaeologists. Second, migration has shaped the regional consciousness, landscape, and myth-making of the historic Southwest in significant ways that merit archaeological attention. Finally, drawing on the example of Alsatian migration to Texas, I propose that an attention to scale – how migrations occur alongside and within other movements – can add nuance to historical narratives of the West by highlighting the great diversity that characterizes the region throughout the historic period. [ABSTRACT FROM AUTHOR]

Water insecurity concerns drove San Antonio, Texas to pursue a controversial $3.4 billion groundwater transfer project from central Texas aquifers. The 228 km Vista Ridge Pipeline (VRP) would increase water supplies by 20%. Analysis through Q-Method revealed three social perspectives surrounding the VRP. Project Advocates offer particular views of urban water security, risk, and accountability. The creation of new hydro-social territories helps to explain Landowner Opposition, while Governance Failure offers a foundational criticism of the underlying assumptions and the institutional innovation of private-public partnership that advanced the VRP. Overall, our paper demonstrates that the VRP is differentiated according to views of risk, water law, and groundwater science. Policy deliberations on future urban water security should include these perspectives as a means to improve water governance, especially as policies and infrastructure for urban water security creates new hydro-social territories. [ABSTRACT FROM AUTHOR]

The ongoing energy transition, including the rapid electrification of energy services, reinforces the importance of secure and reliable electricity infrastructure. Electricity as a critical energy carrier cuts across sectoral boundaries, including but not limited to public health, national security, education, and transportation. Electricity markets treat electricity as a commodity bought and sold in the different restructured markets of the United States and are a critical feature of power systems shaping the energy transition. However, current electricity market developments primarily rely on techno-economic indicators and fall short of incorporating ethical considerations to spur energy transition towards 100% renewable electricity as end-use energy. Even though electricity markets are designed based on the assumption that they are socially valuable, they essentially go unmeasured based on social and ethical parameters and are largely measured using technical and economic tools and criteria. These inadequacies in the development of electricity markets fail to provide energy and other allied services, particularly during and in the aftermath of a disaster, to the people who need them the most. This paper aims to provide an analytical framework using the foundational approach of energy justice for looking at the electricity market development. The paper utilizes the case of the Texas electricity market and its role in dealing with the electricity crisis in Texas during the winter storm of 2021 from the critical lens of energy justice. The paper shows that using the foundational approach of energy justice, the electricity market can be designed more ethically by considering electricity as means rather than only a market commodity. [ABSTRACT FROM AUTHOR]

Transportation agencies should have the capacity to evaluate the damage caused by oversize and overweight (OS/OW) vehicles in order to develop effective infrastructure management and rehabilitation strategies. In this paper, we discussed how to combine different paradigms that influence pavement performance into a single evaluation methodology by integrating the most available historical data with respect to the characteristics of OS/OW vehicles (i.e. dimension and weight), their origin and destination, permitted routes, frequency of the routes, pavement condition data, and climatic effects. The proposed methodology is then implemented into three case studies to indicate its applicability and practicality. In the case studies, we evaluate the impacts of OS/OW loads on pavements under different scenarios and combinations of the related factors. The corresponding relationships between pavement conditions and passing OS/OW loads are quantified with a well-accepted sigmoidal function. The results also indicate that, at the early age of the road, higher OS/OW loading would bring a faster deterioration rate (e.g. about 6% of the reduction in service life for extreme high OS/OW loading, while only 2.35% for low OS/OW loading). At the end of road life, the reduction trend slows down, nearly above 2% for all OS/OW loading levels. [ABSTRACT FROM AUTHOR]

Abstract This paper documents a previously undescribed marine palynomorph, Doricodinium obscurum gen. et sp. nov., from Upper Cretaceous sections in the central and southern Western Interior of the USA. Although an archaeopyle has not been confirmed, a case is made here for a probable dinoflagellate cyst, possible peridinioid affinity. The type locality of D. obscurum is the Global boundary Stratotype Section and Point (GSSP) for the base of Turonian Stage, at Pueblo, Colorado, where it consistently occurs in intra-Lower to middle Turonian deposits. The taxon also occurs consistently in intra-Lower Turonian strata from the Iona-1 core, SW Texas, where astronomical age modelling gives an age range of 93.92–93.25 ± 0.12 Ma in that section. Outside the USA, it has until now only been recorded from the Cenomanian–Turonian boundary interval in Pakistan. Highlights • Description of Doricodinium obscurum gen. et sp. nov., a marine palynomorph, a probable dinoflagellate cyst. • Distribution calibrated at the GSSP for the Turonian Stage, Pueblo, Colorado. • Astronomical age modelling of its distribution in the Iona-1 core, SW Texas. [ABSTRACT FROM AUTHOR]

Municipal underbounding is the systematic failure of cities to annex surrounding minority communities. Recent analyses of the phenomenon in the United States have focused on small White Southern towns with African American communities along the jurisdictional fringe. This paper applies similar logic to the study of the exclusion of colonias in the Lower Rio Grande Valley (LRGV) of Texas. These low-income informal settlements, located in the hinterlands of cities, have historically had high rates of poverty, poor housing quality, and insufficient infrastructure and utility service. Using TIGER/ Line files (GIS shapefiles), Summary Files of the U S decennial censuses, and ArcGIS technology this project explores the prevalence of the municipal underbounding of colonias. In order to place the issue of municipal annexation in context, the paper begins with a description of regional demographic and socioeconomic characteristics, municipal growth, and annexation patterns in the LRGV. The paper then explores the extent to which colonias have been selectively excluded from annexation using logistic and autologistic regression. The results suggest that census blocks that contain colonias are less likely to be annexed than are other census blocks; in addition, those census blocks that contain colonias with poor infrastructure appear to have odds of being annexed that are lower still. The paper concludes with a discussion of the policy implications of these findings. [ABSTRACT FROM AUTHOR]

Even though there is a general acknowledgement that green infrastructure can have a positive role in reducing stormwater runoff, few studies have explored how specific spatial configurations of landscape—one of the critical components of green infrastructure—could influence runoff generation. This study attempts to address this gap by examining the landscape patterns in terms of size, shape, isolation, and connectivity across the four largest metropolitan areas in Texas, using landscape ecology metrics. The outcomes indicate that larger, less fragmented, and more connected landscape patterns are likely to mediate the mean annual peak runoff. In contrast, larger developments of complex shapes with more edges, clustered, and connected are likely to augment the peak runoff. The findings of this paper provide empirical evidences for policy makers to further the importance of interconnection and clusters of green infrastructure and plan strategic green hubs and corridors to more effectively manage stormwater runoff. [ABSTRACT FROM AUTHOR]

This paper reports a study that sheds light on an issue that is important for understanding human behavioral evolution-the factors that influence hunter-gatherers' decisions regarding the number and degree of specialization of their tools. Two primary drivers of technological richness and complexity have been proposed in the anthropological literature: population size and environmental risk. In general, ethnographic studies tend to support environmental risk as the primary driver, whereas the limited number of archaeological studies that have been carried out seem to support population size. These findings are difficult to reconcile because problems exist for both sets of studies. The present study was designed with these problems in mind. We used an archaeological dataset to test which of the hypothesized driving factors-population size or environmental risk-best explains changes in technological richness. More specifically, we investigated whether changes in the number of point types in Texas from the first occupation more than 13,000 years ago to the Late Prehistoric period, around 400 years ago, are better explained by environmental risk or by population size. Bivariate correlations and a generalized linear model indicate that temporal changes in point-type richness in Texas are significantly associated with changes in one of our proxies of risk-global temperature. We found no relationship between temporal changes in point-type richness and changes in population size. Thus, the results derived from this study are consistent with the environmental risk hypothesis and inconsistent with the population size hypothesis. [ABSTRACT FROM AUTHOR]

The paper contributes to notions of 'hybrid' historical geographies of irrigation by focusing on contested visions for irrigation in the Lower Rio Grande Valley of Texas. Adding to geographical work using biography, notions of performance, and racialized landscapes, the paper analyzes debates between John Shary and Charles Pease. Shary and Pease were protagonists, respectively, of pumping water from the Rio Grande and a gravity scheme reliant on action by the U.S. Bureau of Reclamation. The pumping system survived; the gravity system was never constructed. However, the debate between Shary and Pease illustrates tensions within the Anglo elite. The analysis focuses on three early-twentieth-century moments. The first is a 1918 crisis in Shary's irrigation company, followed by a 1927 debate between Shary and Pease over the flaws of the pumping system and benefits of gravity irrigation. Finally, the paper focuses on Shary and Pease's constructions of racialized landscapes that subordinated Hispanics as voters to be utilized for Shary's accumulation strategy, or as 'non-water users' that should be excluded from water politics. The paper argues that Shary and Pease projected similarly exclusionary social visions onto the irrigated landscape in spite of their differences on irrigation systems. [ABSTRACT FROM AUTHOR]

This paper discusses various water management issues facing federal, state, and local agencies charged with managing the water resources of the Rio Grande River Basin and its major tributaries. The Rio Grande—3,058 km (=1,900 mi) long—is the fourth longest river in the United States. The river's basin is 870,236 km2(=336,000 mi2) and for roughly two-thirds of its length it forms the United States–Mexican border. It is a major recreational resource providing world class trout fishing near its headwaters in Colorado's San Juan Mountains and shoreline, angling, and boating opportunities near the Colorado–New Mexico border. The Rio Grande is the principal tourist attraction of Big Bend National Park and flows through downtown Albuquerque and El Paso. Many reaches are wide and broad, but almost all are relatively shallow and not navigable by commercial ships. Nevertheless, it is one of the most important renewable water resources of the southwestern United States and North America. The issue of the “manageability” of the river in the face of social forces and disparate administrative jurisdictions that adversely impact Rio Grande flows is a thread linking various sections of the paper together. The length of the river; the fact that major reaches lie in Colorado, New Mexico, and Texas; and its unique role as an international boundary pose complex management problems. The allocation status quo formed by the complex nexus of existing river laws make it difficult to reshape Rio Grande management. [ABSTRACT FROM AUTHOR]

Gravel aggregates have been used extensively in the Houston District for continuously reinforced concrete (CRC) pavements construction for many years. However, some of these pavements have been subject to early-age delamination and eventual spalling damage. A series of studies since the early 1990's have been conducted to gain a better understanding of mechanisms, material properties, and construction practices related to delamination and spalling. This paper describes a systematic and methodical approach for selecting construction measures to counter the negative effects of using gravel aggregates in concrete paving as it pertains to minimizing early-age delamination distress. The approach was developed based on laboratory measures and practices, numerical approaches for assessing delamination potential, and test sections established in the Houston District, Texas. The testing programs in the laboratory and the field, as well as the analytical results, are presented in this paper. The analysis of the results leads to a step-by-step approach for evaluating and selecting construction measures. [ABSTRACT FROM AUTHOR]

This paper reports the results of a chip seal research project in Texas where the researchers are using both quantitative and qualitative means to evaluate chip seal performance on rural roads. The team is making specific use of the Transit New Zealand (TNZ) T/3 “sand circle” test to measure the change in average texture depth over time and applying those measurements to the TNZ P/17 performance specification for allowable surface texture deterioration over the first year of chip seal performance. The results demonstrate the value of quantitatively characterizing the preseal surface condition as a benchmark against which to compare new chip seal performance. Those roads that had poor preseal surface conditions as exhibited by low macrotexture as measured by the T/3 sand circle test showed early loss of macrotexture and premature flushing after a new seal had been applied and failed the specified P/17 1-year texture loss performance criteria. Thus, the paper concludes that not only is having a quantitative metric essential to be able to accurately assess the performance of new seals but also that the use of the TNZ T/3 sand circle test furnishes an easy, cost-effective means to quantitatively characterize preseal surface texture. [ABSTRACT FROM AUTHOR]

This paper proposes a framework for using business and organizational scenario-planning techniques for regional strategic transportation-planning purposes. The paper provides a brief history of scenario planning as it emerged from business-strategic planning activities and gives an overview of its goals and limitations. The paper then reviews the context for scenario planning in regional transportation planning as well as precedents of its application in this field. The paper continues with a presentation of a scenario-planning framework for transportation as refined and applied to the Houston metropolitan area. The major findings and lessons from this application are discussed, together with conclusions and observations regarding further potentials and refinements. [ABSTRACT FROM AUTHOR]

This paper examines relationships between body weight, religion, and gender while controlling for relevant covariates and body mass index (BMI), a measure of physical/biological body type. Using data from the 2004 Survey of Texas Adults ( n = 1,504), we present results of ordered logistic regression models which indicate that religious factors work distinctly for men and women when controlling for BMI. While church attendance is associated with lower odds of overweight perceptions among women, it is religious salience that is associated with lower odds of self-reported excess weight in men. Implications for research which associates religious and physiological factors are discussed. [ABSTRACT FROM AUTHOR]

Cardiovascular disease (CVD) is the number one cause of death in the state of Texas. In order to develop effective healthcare policies to combat CVD, it is essential to understand what types of communities are most affected. In this paper, we develop a classification scheme to segment high-prevalence communities based on selected social and demographic characteristics. We find that while many high-prevalence areas reflect traditional relationships between socioeconomic deprivation and poor health outcomes, a subset of more affluent communities in Texas are also affected. This suggests the importance of tailored approaches to prevention that account for this diversity among high-prevalence neighborhoods. [ABSTRACT FROM AUTHOR]

Owing to the 2008 economic downturn in the United States, the construction industry lost 632,000 jobs nationally, of which approximately 100,000 were in Texas. In response to the economic recession, a stimulus package known as the American Recovery and Reinvestment Act (ARRA), was signed by President Obama on March 6, 2009. This paper presents the results of a study examining the construction employment impact of ARRA spending on Texas transportation projects. The primary goal of this study was to estimate direct employment in the construction industry from spending on construction projects. By using regression analysis, the study assesses employment from data on Texas Department of Transportation projects that used ARRA funds, showing that employment generated by construction projects depends on project type, size, and location urbanization. The findings can be useful to policy makers in allocating funds on construction projects when employment stimulation is an objective. [ABSTRACT FROM AUTHOR]

The Texas DOT (TXDOT) is concerned about the widening gap between pavement preservation needs and available funding. Thus, the TXDOT Austin district pavement engineer (DPE) has investigated methods to strategically allocate available pavement funding to potential projects that improve the overall performance of the district and Texas highway systems. The primary objective of the study presented in this paper is to develop a network-level project-screening and ranking method that supports the Austin district 4-year pavement-management plan development. The writers developed candidate-project selection and ranking algorithms that evaluated pavement conditions of each project candidate using data contained in the Pavement Management Information System (PMIS) database, incorporated insights from Austin district pavement experts, and implemented the developed method and supporting algorithm. This process previously required weeks to complete, but now requires about 10 min, including data preparation and running the analysis algorithm, which enables the Austin DPE to devote more time and resources to conducting field visits, performing project-level evaluations, and testing candidate projects. The case study results show that the proposed method assisted the DPE in evaluating and prioritizing projects and allocating funds to the right projects at the right time. [ABSTRACT FROM AUTHOR]

The purpose of this study is to demonstrate a longitudinal perspective on state-level recreational fisheries that could be used anywhere systematic angler surveys are conducted over time. With six angler surveys from Texas conducted over a 16-year time period, selected human dimension indicators of recreational fishing were analyzed with the index of qualitative variation (IQV) and Spearman rank-order correlation coefficient. Saltwater anglers demonstrated significant upward trends in household income, self-reported skill, preference for catching one particular species, and satisfaction with their fishing experiences. No significant downward trends were found. Although expected in some cases for various reasons, no significant trends were found in gender, baby boomer participation, racial/ethnic differences, years of fishing experience, and average annual days of saltwater fishing. Finally, this paper demonstrates the need for consistent human dimension questions over time in understanding the longitudinal perspective of recreational fisheries. [ABSTRACT FROM AUTHOR]

Abstract: The largest rivers draining to the Gulf of Mexico in Texas are at more advanced stages of valley filling than rivers with smaller drainage areas, with corresponding differences in alluvial morphology and architecture, and avulsion style. This seems to imply that the larger fluvial systems either produce more sediment relative to the accommodation space in the alluvial valleys, or that they have undergone longer periods of valley aggradation. However, it is not clear that either of these is the case. This paper presents a theoretical analysis showing that fluvial systems with larger drainage areas can produce more advanced stages of infilling than those with smaller drainage areas (but with identical histories and sediment production per unit area) due to the nature of the scaling relationships between drainage basin area and incised valley size, and between basin area and sediment yield. Data for rivers in the region shows a strong linear relationship between valley width and drainage area. The nonlinear relationship between drainage area and proportion of the incised valley filled is somewhat weaker, but still significant, and major deviations are readily explained in terms of local inherited morphology or tectonic features. Results show that major differences in the degree or stage of valley filling could occur due to differences in drainage basin size alone. This indicates caution in interpreting incised valley fills of drainage basins of different sizes in terms of sediment supply. [Copyright &y& Elsevier]

This paper focuses on how the Tyler, Texas Black Film Collection developed as an archival collection, and what this teaches us about contemporary constructions of film history and African American history. More specifically, it describes the appeals and dangers of framing these films within a lost-then-found narrative template, in which their acquisition by an archive is imagined to provide a satisfying sense of closure. [ABSTRACT FROM AUTHOR]

The Bolivar Peninsula in Texas was severely impacted by Hurricane Ike with strong winds, large waves, widespread inundation, and severe damage. This paper examines the wave and surge climate on Bolivar during the storm and the consequent survival and destruction of buildings. Emphasis is placed on differences between buildings that survived (with varying degrees of damage) and buildings that were completely destroyed. Building elevations are found to be the primary indicator of survival for areas with large waves. Here, buildings that were sufficiently elevated above waves and surge suffered relatively little structural damage, while houses at lower elevations were impacted by large waves and generally completely destroyed. In many areas, the transition from destruction to survival was over a very small elevation range of around 0.5 m. In areas where waves were smaller, survival was possible at much lower elevations. Higher houses that were not inundated still survived, but well-built houses at lower elevations could also survive as the waves were not large enough to cause structural damage. However, the transition height where waves became damaging could not be determined from this study. [ABSTRACT FROM AUTHOR]

The model developed in this paper, the bacteria loading estimator spreadsheet tool (BLEST), was designed as an easy to use indicator bacteria model that can overcome the shortcomings of many of the simpler total maximum daily load (TMDL) modeling approaches by integrating spatial variation into load estimates. BLEST was applied to the Buffalo Bayou watershed in Houston, Texas and incorporated loading from point and nonpoint sources, such as wastewater treatment plants, sanitary sewer overflows, septic systems, storm sewer leaks, runoff, bed sediment resuspension, and direct deposition. The dry weather Escherichia coli load in Buffalo Bayou was estimated using BLEST to be 244 billion MPN/day and would require an overall 48% reduction to meet the contact recreation standard, while wet weather loads would need to be reduced by 99.7%. Dry weather loads were primarily caused by animal direct deposition, septic systems and discharges from storm sewers under dry weather conditions, while wet weather loads were mostly attributable to runoff and resuspension from sediment. Unlike most simple TMDL load allocation strategies, BLEST can be used to evaluate spatially variable load reduction strategies. For example, septic system load reductions implemented in less than 10% of the subwatersheds resulted in a decrease in bayou loading of more than 20%. [ABSTRACT FROM AUTHOR]

During the summer of 2005, a tidal creek (“Pine Gully”) within a few kilometers of the Houston Ship Channel was completely blocked by a 200 m long and 1.5 m deep plug of silt and fine sand. This paper documents and explains this unusual sedimentation event. It then presents a new method for calculating ship wave-induced sediment transport into tidal creeks. Between November 2005 and January 2006, measurements of velocity, pressure, and suspended sediment concentration were taken in the creek approximately 150 m seaward of the plug. The data indicated ship wave-induced bores (one per ship). Each bore caused a net sediment transport of approximately 0.4 m3 toward the plug, enough to explain the observed rate of sediment accumulation. Cores of the plug showed that the plug material was consistent throughout, suggesting a single pathway (from the bay). During the period of plug formation, rainfall and creek discharge were relatively low indicating a likely factor for the plugging. Model calculations showed that significant ship wave-induced sediment transport into Pine Gully would occur only when Pine Gully mean depth is less than 0.8 m. [ABSTRACT FROM AUTHOR]

This paper presents three field projects to illustrate the integrated approach to forensic investigations of roadway pavement failures used widely in Texas. In each case, the combined ground-penetrating radar (GPR) and falling weight deflectometer (FWD) data were extremely useful for identifying contributing factors, such as stripping in the hot mix or localized areas of wet or weak base. Dynamic cone penetration (DCP) is used for validating problems with base and subbase layers. Laboratory tests are often required to complete the investigation, especially if the repair strategy calls for in-place recycling of the existing structure. The extent of stripping and high porosity that caused delamination for Projects 1 and 2 was detected by GPR and verified by core samples. GPR, FWD, DCP, and field soil samples all showed indications that the existing base on Project 1 was wet and the stiffness was only about one-third that of a typical flexible base in Texas. FWD data demonstrate that the pavement structures for Projects 1 and 2 were inadequate, so a rehabilitation strategy was selected that included structural strengthening. In Project 3, GPR, lab density, and permeability tests indicate that the dramatic pavement failures were attributable to moisture entering the base through a poorly compacted asphalt concrete layer and poor longitudinal joints. The base material was found to be highly susceptible to moisture and did not meet the Texas Department of Transportation’s compressive strength requirements when subjected to capillary soaking. The repetitive triaxial test results revealed that the stiffness and load-carrying capability became inadequate when the base materials were exposed to moisture. The pavement structure had been totally replaced in 2004. [ABSTRACT FROM AUTHOR]

Abstract: Chagas disease is endemic and is recognized as a major health problem in many Latin American countries. Despite the parallels between socio-economic and environmental conditions in Texas and much of Latin America, Chagas disease is not a notifiable human disease in Texas. Based on extensive review of related literature, this paper seeks to recognize the evidence that Chagas Disease is endemic to Texas but the epidemiological, parasitological and entomological patterns of Chagas disease in Texas are both different from and parallel to other endemic regions. We find that with a growing immigrant human reservoir, the epidemiological differences may be reduced and result in increasing incidence of the disease. Chagas disease should be recognized as an emerging disease among both immigrant and indigenous populations. Without proper actions, Chagas disease will place increasing burden on the health care system. Current medical treatments consist of chemotherapies that carry the risk of serious side effects; curing the potentially fatal disease remains equivocal. Therefore, as shown in South America, prevention is paramount and can be successfully achieved through intervention and education. We conclude that biogeographical research is needed to (1) distinguish the dynamic evolution of the agent–vector–host system, (2) document locations with greater risk and identify mechanisms responsible for observed changes in risk, and (3) assist in developing a model for Triatomid vector-borne disease in states like Texas where the disease is both endemic and may be carried by a sizeable immigrant population. Tracking of Chagas disease and planning for appropriate health care services would also be aided by including Chagas disease on the list of reportable diseases for humans. [Copyright &y& Elsevier]

Researchers identified a potential methodology for obtaining the incremental societal costs and benefits from a variable pricing project and applied that methodology to the QuickRide high occupancy/toll (HOT) lanes in Texas. This is one of the longest running variable pricing projects in the United States and, as such, it provided useful historical data and trends upon which to estimate future benefits and costs. This analysis found that the incremental societal benefits of QuickRide exceeded incremental societal costs for the time period considered. A companion paper that used the same methodology to examine the benefits and costs of the SR-91 Express Lanes found similar results. However, the differences between the benefits and costs were dramatically different for the two projects, indicative of the relative size of the two projects and the number of travelers impacted. On SR-91, tens of thousands of travelers were impacted on a daily basis where QuickRide’s impact was limited to approximately 400 travelers per day. Interestingly, the benefit-cost ratios of the two projects were similar, both between 1.5 and 1.7. [ABSTRACT FROM AUTHOR]

Reflective cracking through jointed concrete pavement overlays has been a persistent problem. Several different rehabilitation strategies have been used in Texas. This paper is a summary of the performance of strategies used in the past 10 years. The performance of the crack-retarding grid has been disappointing as it has been related to several premature failures. Only one project has realized a benefit of the crack-retarding grid, where the reflective cracking was delayed by about 1 year. The writers believe the small openings in the crack-retarding grid and the lack of an effective bond may be the causes of the layer separation. A proprietary crack-retarding asphalt material has been performing well over two years of monitoring. In one experimental project, 100% of the cracks reflected through conventional overlay material in the first year. Both Petromat fabric underseal and crack-retarding asphalt material have been performing satisfactorily to retard reflective cracking. However, there is a large cost difference between these two treatments. Seven experimental treatments on a major section of US 59 were evaluated. The worst-performing section on the US 59 project was the break-and-seat method, which failed due to weak subgrade support. The weak subgrade is unable to support cracked concrete, which leads to a rocking action under traffic loads. It is concluded that for future projects, the break-and-seat method should not be applied on subgrade with a dynamic cone penetrometer penetration rate exceeding 25 mm per blow. A flexible base overlay with thin asphalt surfacing and the Arkansas (large stone) mix have performed well. Flexible base overlays were able to absorb the joint movement and eliminate the reflective cracking. The flexible base should be of top quality with very low moisture susceptibility. In Texas, this involves specifying a Texas triaxial Class 1 material with classification of “good” in suction/dielectric tests. It is also critical to provide an effective seal for the flexible base. A chip seal followed by a thin 75-mm hot mix layer is recommended. [ABSTRACT FROM AUTHOR]

Recently, a structural condition index (SCI) was developed for the Texas Department of Transportation as a screening tool to discriminate between pavements that need structural reinforcement from those that do not. For the successful implementation of the SCI concept at the network level, one of the critical issues is to determine the minimum falling weight deflectometer (FWD) testing frequency. The paper discusses how to determine the required FWD testing frequency, or the required FWD test spacing needed for implementing the SCI at the network level. In this study, the risk-based method was employed, where the variance of the SCI at the network level was assessed by randomly selecting a small sample of the pavement sections that were representative of the whole network. Due to the limited number of such sections and the lack of knowledge of underlying distribution of the SCI variances at the network level, the bootstrap method was used to obtain the mean and the confidence intervals on the mean of the SCI variances at the network level. [ABSTRACT FROM AUTHOR]

This paper focuses on the cause, possible solutions, and future prevention of pavement heave at a new construction project. We speculated that heaving on the east side of the project was caused by a reaction between the lime stabilizer and minerals in the soil. Because of a difference in soil chemistry, the west side of the project (which was still under construction) did not show evidence of heaving. A forensic investigation was initiated to test our hypothesis. The findings of the investigation concluded that the cause of the heaving on the east side of the road was related to the formation of the expansive mineral, ettringite. Ettringite formed due to the reaction of the lime stabilizer with seams of high sulfate soil on the east side. Laboratory testing did not find any effective stabilizer for the high-sulfate soils on the east side. Therefore, reconstruction would involve removing and replacing the treated layer with a select material that has less than 2,000 ppm sulfates. Test results indicate that there was no threat of sulfate heave on the west side. District personnel had performed the field conductivity tests to evaluate and monitor the concentration of the sulfate content on the remaining project. The treatment of 3%/72-h mellowing period/3% lime treatment was employed on the west side. The whole project has been completed for 1 year and no heave has been observed. [ABSTRACT FROM AUTHOR]

This paper describes a 5-year planning process that addressed the decline of hunting participation in Texas. We began the planning process by examining 20 years of research that revealed a decline in hunting participation and factors contributing to the decline. We convened a Hunting Think Tank meeting where we presented the 20-year trend data to 30 individuals with vested interests in the future of hunting in Texas. One outcome of the first meeting was the development of a synthesis brochure, "The Future of Hunting in Texas," to educate the hunting public and stakeholders about current trends and future implications and build support for the need to develop a strategic plan. The Future of Hunting information and brochure were presented to the Hunting Advisory Board of the Texas Parks and Wildlife Department, after which the Board added development of a strategic plan to its agenda. In fact, the 2002 Governor's Hunting Heritage Symposium was delayed one year until a strategic plan was developed. Group Solutions was hired to survey the hunting and nonhunting public about the future of hunting in Texas. Its survey data were used to define content of the strategic plan during a 2-day meeting of 60 invited stakeholders before the annual conference of the Texas Wildlife Association. The strategic plan included, among other things, all issues and problems associated with the decline in hunting participation in Texas, an action plan to address the decline, and the requirements needed to activate the plan. Several other valuable outcomes derived from the planning process, beyond development of the Strategic Plan, were included in this report. [ABSTRACT FROM AUTHOR]

The Accreditation Board for Engineering and Technology has developed and implemented new criteria for accrediting engineering technology programs in the United States. The new criteria, Technology Criteria 2000 (TC2K), have changed the way that engineering technology programs conduct their business. In order to survive in the future, each program has to develop a strategy to meet the new requirements specified in the TC2K. The Department of Engineering Technology at Texas Tech University has developed a program assessment portfolio (PAP) to assess the department performance toward the attainment of TC2K Criterion 1. This paper presents 12 assessment methods within the PAP. Particularly, it demonstrates how to develop and implement one of the assessment methods, pre- and postcourse assessment, to a senior-level course. Data collected from the implementation has been analyzed and results indicate that pre- and postcourse assessment provide valuable information regarding student learning. Furthermore, the information can be used to continue improving effectiveness of teaching. [ABSTRACT FROM AUTHOR]

Public education campaigns, to be successful, must repeat simple, consistent messages over time, using various sources and media. During the 2000, 2001, and 2002 ozone seasons, the North Central Texas Council of Governments (NCTCOG) employed a four-pronged, multimedia approach to educate the public about air quality in the Dallas/Fort Worth (DFW) region. The four-pronged approach included several varied information sources:

Geoforensics leverages various spatial analytical, biological, ecological, and geological techniques to improve criminal investigations, including efforts to thwart terrorism, evaluate humanitarian crises or identify the origin of fraudulent goods. In addition to investigating what took place, geoforensic efforts often focus on determining where and when the event occurred. Forensic palynology is a promising subfield of geoforensics that uses pollen to link persons or objects to particular places and times. This promise is driven by pollen's strong utility as a biomarker. It is ubiquitous, durable and demonstrates a relatively predictable distribution in time and space. As a result, pollen often provides important clues for determining the provenance of hard-to-trace items, such as computers, fraudulent goods, digging tools, clothing, and undetonated explosives during geoforensic investigations. One major limitation that has reduced the implementation of forensic palynology is the lack of computational tools that relate pollen species to geographic locations. The purpose of this paper is to introduce a robust geocomputational framework that uses pollen sample composition to identify the relative likelihood of potential origin locations for improving geoforensic efforts. Using USDA CropScape data for the state of Texas, our results suggest that this framework allowed for multiple potential origin sites to be identified simultaneously, with solution properties that were better than a random process and offer a possible alternative to the single site joint probability approaches commonly used in the field of forensic palynology. • Pollen is small, durable and ubiquitous – making it an excellent biomarker for geoforensics • Pollen can be linked to specific places at specific times • We present geocomputational framework that uses pollen to identify potential origin locations for objects of interest • GOFIND offers an alternative to the single site, joint probability approaches commonly used in forensic palynology. [ABSTRACT FROM AUTHOR]