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Non-stationarity analysis of flood extremes under climate change and human activities in the Yuan River Basin, China
Published 2025-02-01Subjects: Get full text
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Spatiotemporally Combined Dimensionality Reduction Algorithm for Optimizing Long-term Operation of Multi-reservoir Systems
Published 2023-01-01“…To alleviate the “curse of dimensionality” and improve the solution efficiency while ensuring the quality of solutions in optimizing the operation of multi-reservoir systems,this paper proposes a spatiotemporally combined dimensionality reduction algorithm which integrates and improves the dynamic programming with successive approximation (DPSA) and the progressive optimality algorithm (POA).First,a chain-based successive approximation strategy is proposed to expand the DPSA's optimization mode from “single reservoir alternation” to “cascade reservoir chain alternation”,which makes up for the DPSA's shortcomings in dealing with the hydraulic coupling relationships among cascade reservoirs.Then,a dynamic variable decoupling strategy and perturbation mechanism are proposed to deal with the POA's blind search problem and dimensionality problem.Finally,the two improved algorithms are combined,in which the improved POA is applied to solving the optimization problems of cascade reservoir chains under the framework of the improved DPSA.The power generation operation problem of the cascade reservoirs in the Yuan River Basin of Hunan Province and the classical ten-reservoir problem are utilized to test the performance of the proposed algorithm.The proposed algorithm outperforms seven existing alternatives in terms of solution quality and efficiency.The results indicate that the proposed algorithm can effectively alleviate the “curse of dimensionality” in optimizing the operation of multi-reservoir systems,improve the efficiency while ensuring the quality of solutions and has potential to be applied to optimizing the operation of complex large-scale multi-reservoir systems.…”
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Two new species of freshwater goby (Teleostei, Gobiidae) from the Upper Youshui River, Chongqing, China
Published 2024-08-01“…Two previously unknown species of Rhinogobius have been discovered in the streams of the Upper Youshui River, within the Yuan River Basin, Xiushan County, Chongqing, China. …”
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Gravel bars can be critical for biodiversity conservation: a case study on scaly-sided Merganser in South china.
Published 2015-01-01“…In this study, we surveyed the endangered Scaly-sided Merganser Mergus squamatus along a 40 km river section of Yuan River, in Central China, for three consecutive winters. …”
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Investigation of indoor thermal comfort of heritage buildings in hot summer and cold winter zone of China: A case study
Published 2024-01-01“…Field measurements and questionnaire surveys were used to conduct specific studies on the winter indoor thermal comfort of two typical traditional residential buildings (“Yinziwu” and “Diaojiaolou”) in the Yuan River basin heritage building area. The aim is to investigate the current status of building thermal comfort and provide a theoretical basis for promoting their sustainable development. …”
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Monitoring the Land Cover Changes in Mangrove Areas and Urbanization using Normalized Difference Vegetation Index and Normalized Difference Built-up Index in Krabi Estuary Wetland,...
Published 2021-07-01“…In addition, areas that are sensitive to land-cover change appear around the Chi rat River, Pak Nam Krabi River, and Yuan River, which are tourist areas close to the Krabi and Ao Nang communities. …”
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Improving the integrated hydrological simulation on a data-scarce catchment with multi-objective calibration
Published 2021-03-01“…For the study catchment with limited observations like the Yuan River Catchment (YRC) in China, the three groups corresponded to discharge from three hydrometric stations, both Nash–Sutcliffe efficiency (NSE) and inversed NSE for discharge evaluation, and MODIS global terrestrial evapotranspiration product and baseflow filtered from discharge as metrics, respectively. …”
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Monitoring the Land Cover Changes in Mangrove Areas and Urbanization using Normalized Difference Vegetation Index and Normalized Difference Built-up Index in Krabi Estuary Wetland,...
Published 2021-07-01“…In addition, areas that are sensitive to land-cover change appear around the Chi rat River, Pak Nam Krabi River, and Yuan River, which are tourist areas close to the Krabi and Ao Nang communities. …”
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Monitoring the Land Cover Changes in Mangrove Areas and Urbanization using Normalized Difference Vegetation Index and Normalized Difference Built-up Index in Krabi Estuary Wetland,...
Published 2021-07-01“…In addition, areas that are sensitive to land-cover change appear around the Chi rat River, Pak Nam Krabi River, and Yuan River, which are tourist areas close to the Krabi and Ao Nang communities. …”
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Monitoring the Land Cover Changes in Mangrove Areas and Urbanization using Normalized Difference Vegetation Index and Normalized Difference Built-up Index in Krabi Estuary Wetland,...
Published 2021-07-01“…In addition, areas that are sensitive to land-cover change appear around the Chi rat River, Pak Nam Krabi River, and Yuan River, which are tourist areas close to the Krabi and Ao Nang communities. …”
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Morphology and FTIR Characteristics of the Alluvial Diamond from the Yangtze Craton, China
Published 2022-04-01“…These diamond samples, collected downstream of the Yuan River, Hunan Province, with unknown host-rock source(s), were observed by scanning electron microscope (SEM) and Fourier-transform infrared spectroscopy (FTIR). …”
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Influence of social and economic development on water quality in Dongting Lake
Published 2021-11-01“…The influence degree decreased in the Dongting Lake basin, Xiang River and Li River watersheds, whereas the trend was the opposite in the Yuan River and Zi River watersheds from 2004 to 2017. …”
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Modified drought propagation under a changing environment: A case study in the Dongting Lake basin, China
Published 2024-12-01“…New hydrological insights for the region: (i) Compared with the baseline period, the severity of HD in the Li River (LR) and Yuan River (YR) increased by 0.5 % and 1.3 % during the impacted period, respectively, while that in the Zi River (ZR) and Xiang River (XR) decreased by −25.9 % and −31.6 %, respectively; (ii) Human activities have weakened the correlation between HD and MD, resulting in various patterns of propagation time in different sub-basins and seasons; (iii) As a whole, propagation threshold from MD to HD became larger during the impacted period, with an average change rate from 0.9 % to 195.5 %.…”
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Assessment of agricultural sustainability performance in Dali Prefecture, China using the DPSIR Model
Published 2024-12-01“…Yunnan’s proximity to the Yangtze, Lancang, and Yuan Rivers makes agriculture vital for the downstream livelihoods and biodiversity. …”
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