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The spatiotemporal patterns of key hydrological variables across China were illustrated based on the developed Water and Energy Transfer Processes model in China (WEP-CN model). Time series of four key hydrological variables, namely, precipitation (P), runoff (R), infiltration (Inf), and actual evapotranspiration (ETa), were obtained over 60 years. Then, the temporal trends and spatial differences of these variables were analyzed using the Mann-Kendall and linear methods on a national scale and on the water resource regional scale. Moreover, we explored the drivers and constraints for changes in R, Inf, and ETa. The results showed: (1) Based on the coefficient of variations of P (5.24%), R (11.80%), Inf (2.57%), and ETa (3.77%), R was more fluctuating than the other variables. (2) These variables followed a similar trend of gradually decreasing from the southeast coast to the northwest inland. (3) Changes in R and Inf were caused mainly by P, having correlation coefficients with precipitation of 0.74 and 0.73, respectively. The ETa was constrained by a combination of P and energy. The results improved the refined and quantitative research on hydrological processes in China, identified the differences in hydrological variables between water-resource regions, and provided a useful supplement to the research of the large-scale hydrological process. [ABSTRACT FROM AUTHOR]

• Dam regulation disturbances influence distribution of planktonic organisms. • Ecological environment status of the upstream was better than middle and downstream. • The negative impact of human interference on the ecological health of the Shaying River is greater than the positive. In multi-dam river systems, human disturbances can significantly disrupt river connectivity, fragment habitats, and harm aquatic ecosystems. Aiming at the comprehensive assessment of the spatial distribution of water ecological health, as well as the investigation of the impacts of human activities on river health, Shaying River in China between 2011 and 2015 was taken as a case study. Data on water environment, ecology, and habitat quality were collected by field investigations and then investigated by correlation analysis and principal component analysis. The SMI-P method was adopted to estimate the water ecological health condition. It was found that oxygen-consuming organic pollutants and nutrient salts were predominantly concentrated in the midstream and downstream sections, leading to severe pollution and degraded aquatic biodiversity. All monitored river sections were classified as the sub-healthy state or worse, while the Huaidian section exhibited the poorest conditions, with 100% of ratings falling into medium and sub-morbid categories. It was concluded that dam regulation, tributary water quality, and seasonal drivers like fertilizer use and river flow discharge, were the primary factors affecting the spatial variability of river ecological health. Furthermore, this paper has proposed a well-suited framework for the assessment of the water ecological health of dam-controlled rivers. This framework can be widely applied to similar river systems, providing valuable insights for effective management and conservation efforts. [ABSTRACT FROM AUTHOR]

Sinonasal Rosai-Dorfman disease (S-RDD) is a rare form of RDD limited to the sinonasal cavity. Multipatient studies of Chinese S-RDD and documentation of its clinical spectrum are rare. This study aimed to identify the clinical profiles of Chinese S-RDD. Medical records of and tissue sections from 10 patients diagnosed with S-RDD between 2007 and 2014 were reviewed. Data on clinical presentations, endoscopy signs, imageological change, treatment and outcome were analyzed. The mean age of five male and five female patients at the first visit was 40.3 years and the mean follow-up period was 58.6 months. Based on the lesion sites, five cases were divided into an anterior sinonasal group, accompanied by symptoms of epistaxis, nasal obstruction and nasal dorsal deformity. Five other cases were divided into a posterior sinonasal group, accompanied by symptoms of hyposmia, epistaxis and nasal obstruction. Endoscopy signs and imageological changes in the anterior group showed diffuse infiltration of the RDD lesion under the septum mucosa, but in the posterior group the RDD lesions often showed as formations on polyps. At the end of follow-up, only one case spontaneously resolved without surgery; two cases in the anterior sinonasal group and three cases in the posterior sinonasal group recurred after endoscopic surgery, but surgery can result in short-term symptomatic control and restoration of function in all cases. S-RDD of the anterior and posterior sinonasal cavity may have different clinical characteristics; endoscopic surgery is effective for short-term symptomatic control and restoration of function for S-RDD. [ABSTRACT FROM AUTHOR]

Herein, the occurrence of three Hexabromocyclododecane (HBCDD) diastereoisomers in soil and road dust from the mixed-land-use areas in Shanghai was investigated. The total concentrations of HBCDDs (∑ HBCDDs) in soil ranged from 0.30 to 249 ng g − 1 dw, with a median level of 5.14 ng g − 1 dw. For the road dust samples, the ΣHBCDD concentrations varied from 4.11 to 508 ng g − 1 dw, with a median level of 23.4 ng g − 1 dw. The levels of HBCDDs varied in different mixed-land-use areas. In soil, the levels of HBCDDs increased in the following sequence: residential area & agricultural area (R&A) < agricultural area & industrial area (A&I) < residential area & commercial area (R&C) < residential area & industrial area (R&I); the levels for the road dust were A&I < R&A < R&C < R&I. The proportions of α-HBCDD in road dust samples were significantly higher than those of α-HBCDD in the soil. For soil, the portion of α-HBCDD increased in the following sequence: R&I < A&I ≈ R&A < R&C, while that for the road dust was R&C < R&A < R&I < A&I. Significant correlations in the concentrations of HBCDDs between soil and road dust from R&C and R&I were found, which suggested that they may share similar sources in these regions. On the basis of the HBCDD concentrations of road dust and soil, the contributions of ingestion, dermal contact absorption and inhalation intake to total estimated daily intakes (EDIs) were estimated. The highest total EDIs of ∑ HBCDDs (sum of ingestion, dermal contact absorption and inhalation intake) were 0.154, 7.5 × 10 − 2 ng kg − 1 d − 1 for infants from road dust and soil in R&I, respectively. [ABSTRACT FROM AUTHOR]

Quantitative assessment of the water use balance between economic society and ecology (EEWB) is the basis for coordinating the competitive relationship of water use between human activity and ecological requirements and. It is of great significance for optimizing the water resources carrying capacity and achieving a healthy regional water balance. Based on the concept of harmonious balance, this paper puts forward the definition and connotation of EEWB regarding the competition in water use between economic society and ecology. And, a novel framework for assessing the EEWB is proposed. It has four aspects relating to water resources, economic society, ecology, and human-water relationship. Linked to these aspects the Data Envelopment Analysis (DEA) technique, Water Ecological Footprint (WEF) model, InVEST model and indicators system of human-water relationship are used to establish a water resources efficiency index (I EEWB-W ), economic society high-quality development index (I EEWB-ES ), ecology health index (I EEWB-E ), harmony index of human-water relationship (I EEWB-H ). The four indices were then integrated into the water use balance between economic society and ecology index (I EEWB ) with Euclidean distance, thus forming the EEWB quantification method system. Finally, the temporal and spatial characteristics of EEWB during 2010-2022 was diagnosed in Henan Province and cities of China. Results reveal that: (1) The water resources utilization efficiency exhibit a changing trend of initial decrease followed by subsequent increase; (2) Southern cities in Henan Province have a higher economic society development level compared to northern cities; (3) I EEWB-E in Henan Province is below 0.60, indicating that the regional ecology health remains consistently vulnerable; (4) I EEWB-H in Henan Province shows an increasing trend, indicating that a gradual improvement and overall upward development in the human-water relationship; (5) I EEWB multi-year average was within [0.53, 0.65] in Henan Province, indicating a state of Proximity imbalance. The low level of ecological health is the primary influencing factor. These findings will contribute to a better understanding of the water use balance between economic society and ecology and provide scientific reference for achieving a healthy regional water balance., (© 2024. The Author(s).)

In order to develop a better model for quantifying aquatic community using environmental factors that are easy to get, we construct quantitative aquatic community models that utilize the different relationships between water environmental impact factors and aquatic biodiversity as follows: a multi-factor linear-based (MLE) model and a black box-based 'Genetic algorithm-BP artificial neural networks' (GA-BP) model. A comparison of the model efficiency and their outputs is conducted by applying the models to real-life cases, referring to the 49 groups of seasonal data observed over seven field sampling campaigns in Shaying River, China, and then performing model to reproduce the seasonal and inter-annual variation of the water ecological characteristics in the Huaidian (HD) site over 10 years. The results show that (1) the MLE and GA-BP models constructed in this paper are effective in quantifying aquatic communities in dam-controlled rivers; and (2) the performance of GA-BP models based on black-box relationships in predicting the aquatic community is better, more stable, and reliable; (3) reproducing the seasonal and inter-annual aquatic biodiversity in the HD site of Shaying River shows that the seasonal variation of species diversity for phytoplankton, zooplankton, and zoobenthos are inconsistent, and the inter-annual levels of diversity are low due to the negative impact of dam control. Our models can be used as a tool for aquatic community prediction and can become a contribution to showing how quantitative models in other dam-controlled rivers to assisting in dam management strategies.