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This article describes and analyzes Wixarika mythology related to rivers, oceans and rain, especially in light of the concerns for their mythology raised by the construction of two hydroelectric dams: one already constructed at Aguamilpa on the Grande de Santiago River, and another soon to be built on the San Pedro River. The objective of the essay is to underscore some principles for understanding the internal logic of Wixarika rhetoric in terms of otherness and the transformation of tradition. [ABSTRACT FROM AUTHOR]

Hydrological and geomorphological studies have increased in recent years indicating their importance to understand the functioning of river systems. In this research, the hydrogeomorphological quality of the Utcubamba River, located in the Amazon basin, was evaluated. By applying the Hydrogeomorphological Index (IHG) along its main watercourse the basin was divided into eight river sections. The results showed that the Utcubamba River is affected by significant anthropogenic impacts which modify the hydrogeomorphological conditions, with an increasing damage of them from its river source to his mouth. The quality of the riverbanks is most affected along the entire basin, mainly in the lower course due to extensive agriculture and livestock farms that are dominant in this part. Moreover, the IHG showed a complete adaptability to the conditions of the study area, in a different geographical area and far from the Iberian Peninsula. [ABSTRACT FROM AUTHOR]

This article shows the results of the hydrologic analysis of watersheds of rivers Sinú, Aracataca, and Foundation. The characteristics and variability of river inputs (flow and sediment transport) and historical trends to identify regional patterns in fluvial dynamics were evaluated. Records of flow and sediment transport were taken of the Institute Hydrologic and Studies Environmental (IDEAM), to perform a statistical analysis of the time series of sediment transport and flow. Sediment transport and stream flow, were show highly dependent, while the dual-mass curves helped to identify the influence of external factors on sediment transport. The dynamic of the basins Fundación and Aracataca, showed maximum events with return periods of 2 and 10 years, while the Sinú River fluvial dynamics was maintained regular due to the influence URRÁ dam. The basins were subject to weather conditions equal, which explains the behavior recorded. [ABSTRACT FROM AUTHOR]

Hydrological modelling is the basis for the comprehensive management of hydrological resources, and in the case of high-mountain watersheds, it involves a complex physicochemical process interaction. This study, conducted in the Chinchiná river watershed (Colombia), poses a multimodel analysis in order to capture the uncertainty associated with the hydrological modelling by means of seven hydrological models, continuous simulation rain-runoff, monthly-scale aggregates, with different complexity levels. The capability to reflect the hydrological response was analyzed through graphical and statistical methods. The results exhibited in the statistical indicators, the hydrographs, and the discharge duration curves allow a better compression of the runoff in high-mountain watersheds. The Tetis and abcd concept models, as well as the ARMA (1,1) Salas & Smith auto-regressive model, satisfactorily captured the mean discharge, and they could be applied for the estimation in non-appraised watersheds in the zone of the study. [ABSTRACT FROM AUTHOR]

As part of the project "design and calibration of a network of meteorological stations for the hydrological risk assessment in the micro-watershed of La Presidenta stream", the most relevant parameters for a technical location of meteorological stations in the network design stage are defined and quantified, with a limited scope to urban mid and high-mountain watersheds. The proposed methodology involves the development of an Analytical Hierarchy Process adaptation, combined with the use of different Geo-informatics tools for spatial modeling of territorial variables. This allows the identification of suitable zones to capture meteorological data, which will be used in the watershed hydrological risk assessment. For the study case, eight criteria and four possible modeling scenarios were considered. The results are similar in two of the suggested scenarios. As main conclusion, the proposed methodology allows to generate consistent results with those expected in-situ, although reality about location process -mainly administrative and logistic requirements -to a large extent limits the places to finally install the devices. [ABSTRACT FROM AUTHOR]

Copyright of Cuadernos de Investigación Geográfica is the property of Universidad de la Rioja, Servicio de Publicaciones and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Traditional methods used in hydrologic engineering to estimate extreme river discharges of different return periods are based on the assumption of stationarity in the probability distribution function of the series of extreme flows. This hypothesis collapses owing to the effects of climate change, climate variability, land use/land change, and deforestation on the hydrological dynamics, which are reflected into the series of hydrologic variables. We illustrate such effects on the hydrology of Colombia, and implement two models for estimating extreme river discharges using mixed probability distribution functions, which take into account the effects of climate variability on the series of extreme discharges. Application of these methods for Colombian rivers allowed us to conclude that the Mixed Type I Weibull distribution provides an adequate estimation for low flows, and the Fréchét Mixed Type I distribution for peak flows and floods. [ABSTRACT FROM AUTHOR]

Hydrologic studies in Coro river's basin haven't taken into account spillway's overflow neither reservoir dam "El Isiro" collapse. This reservoir, located at Coro river's basin, serves as a source for supplying drinking water to Coro city in Venezuela. Downstream of this dam is the river's floodplain, which has been under an urbanization process. Also currently, there is a developing agricultural project to exploit plain's advantages in that sense. Therefore, this work is held to incorporate the sub-basin that drains into the reservoir "El Isiro" and to take into account the possibility of dam breaking by using software HEC-HMS and HEC-GEOHMS, which allow the use of Geographic Information Systems (GIS) to optimize the formulation of the basin's conceptual model. According to the results, a high impact in residential and agricultural areas (in terms of peak flows and runoff volumes) by considering reservoir dam "El Isiro" breaking can be appreciated. This paper represents a valuable contribution to flood risk management in the study area. [ABSTRACT FROM AUTHOR]

"Lázaro Cárdenas" and "Francisco Zarco" water reservoirs are located in central- northern Mexico. In order to improve water balance, transit time and Doppler effect ultrasonic level gauges were placed in both reservoir outlets and in the river interconnecting them. In the first dam outlet two ultrasonic transit time sensors were placed in each of its three tunnels. In the "Nazas" river, communicating dams, two ultrasonic level gauges were settled, both with redundant gauges of level and discharge. In "Francisco Zarco" dam outlet a Doppler current meter was set as well as, in the river bottom, a redundant gauge of level and discharge. This paper describes the selection of each type of gauge, the basics of its technology and how they should be placed and operated. A favourable impact has been achieved in the improvement of water management in the zone. [ABSTRACT FROM AUTHOR]

Copyright of Tecnología y Ciencias del Agua is the property of Instituto Mexicano de Tecnologia del Agua (IMTA) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Tecnología y Ciencias del Agua is the property of Instituto Mexicano de Tecnologia del Agua (IMTA) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Source Matelas, located in the West State, Republic of Haiti, is a town with scarce economical resources and low quality of life, mainly because of the absence almost total of water. In this work we give a first approximation to a water reservoir pre-feasibility study, related to water supply quantification of the region, by means of hydrological methods to estimate unknown information. Long term components of the hydrological balance are calculated and daily mean yield that serves the model of reservoir simulation is estimated. The mean runoff calculated for the Source Matelas River is 0.026 m³/s. Based on reservoir modeling, volume needed to supply different percentages of the mean runoff is calculated. Therefore, it can be seen that population water demand will be supplied totally if a reservoir of 212000 m³ volume is constructed. [ABSTRACT FROM AUTHOR]

The purpose of this study is to present preliminary results of the hydrologic and topographic monitoring of a small stream at the King George Island, Antarctica. Two methods were used in order to measure stream discharge: an area-velocity method using a flow meter and a Parshall flume. Also a topographical survey was made using a total-station theodolite. Great stream discharge fluctuations were identified at the seven stream sections between January 21st and February 13th, 2000. Comparison between 1999 and 2000 topographic survey showed a volumetric decreasing of about 9.450 m3 in one year. This topographic variation could be explained by the erosive capacity of the maximum discharges occurred during the beginning of the austral summer, when a new channel was built. [ABSTRACT FROM AUTHOR]