Showing 501 - 520 results of 938 for search '"river basin"', query time: 0.08s Refine Results
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    Drought characteristics and propagation under anthropogenic impacts: A regional-scale modelling analysis in four Large Basins of China by Haoran Hao, Ningpeng Dong, Mingxiang Yang, Xin Huang, Hejia Wang, Hao Wang

    Published 2025-02-01
    “…Study region: The Songhua River Basin, the Yellow River basin, the Yangtze River basin, and the Pearl River Basin in China. …”
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    Research on Historical and Future Spatial-Temporal Variability of Precipitation in China by Jun Yin, Denghua Yan, Zhiyong Yang, Zhe Yuan, Yong Yuan, Hao Wang, Xiaoliang Shi

    Published 2016-01-01
    “…Results indicated the following. (1) During 1961–2011, annual precipitation in Haihe River Basin decreased significantly while the annual precipitation in river basins in the northwest increased significantly. …”
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    Analysis of the Hydrological Regime in Small Basins within the Three Gorges Reservoir Area During the Impoundment Period by YIN Siwei, HU Huiling, WANG Yuefeng, LEI Chaogui

    Published 2023-01-01
    “…Hydrological regime is an important problem brought about by the Three Gorges Project and directly influences the development and utilization of water resources and ecological sustainable development in the Three Gorges Reservoir Area.Existing studies mainly focus on the influence of water storage on the main stream of the Yangtze River,with little attention to the runoff variations in small basins of the reservoir area.Based on the daily hydrological data of three typical small basins (Daning River,Pengxi River,and Modaoxi River) in this area from 2003 to 2017,by adopting the methods of trend analysis,runoff concentration degree, and runoff concentration period,the multi-time scale change characteristics of runoff are identified from the aspects of runoff and dispersion degree.Meanwhile,the runoff characteristics before and after 175 m water storage (2003—2008,2009—2017) are revealed,and the influencing factors of runoff variations are discussed.The results are as follows.① The average annual runoff of the Daning River Basin and Pengxi River Basin shows a downward trend,but there are no obvious variations in the Modaoxi River Basin.The monthly average runoff in the three basins varies greatly.The runoff of the Daning River Basin and Pengxi River Basin has a significant decrease in the flood season (July),while that of the Modaoxi River Basin has significant increases in the non-flood season (February),and the extreme value of runoff mainly shows a non-significant downward trend.② The runoff concentration degree and runoff concentration period of each basin show a non-significant decrease or increase respectively.③ After water storage,the runoff concentration period of each basin obviously lags behind the precipitation,the annual runoff distribution tended to be uniform,and the precipitation-runoff correlation decreases.The correlation coefficient of monthly average runoff decreases about 2%~6%,while that of annual extreme value decreases about 3%~12%.The research results can provide a scientific basis for hydrological and water resources management in small basins in the Three Gorges Reservoir Area.…”
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    Study on the Annual Variation Characteristics of Runoff in Yunnan by GU Guihua, LI Xuehui, YU Shoulong, DUAN Lusong

    Published 2021-01-01
    “…To study the annual variation characteristics of runoff in Yunnan Province and analyze the main influencing factors,based on the observed monthly and annual rainfall and runoff data of 9 representative hydrological stations in 6 major river basins in Yunnan from 1956 to 2016,this paper analyzes the annual runoff distribution in terms of the uniformity,concentration and relative variation range.The research shows that:①The uniformity coefficient (C<sub>u</sub>) of runoff distribution in many years ranges from 0.55 to 1.21,and the concentration (C<sub>n</sub>) ranges from 0.23 to 0.66,so the runoff is unevenly distributed in the whole province.②The C<sub>u</sub> and C<sub>n</sub> decrease in general.Especially after 2000,the annual distribution of runoff shows a trend of uniformity.③The runoff concentration is relatively high in the Yangtze River Basin and the Honghe River Basin,and the annual runoff distribution is flat in the Lancang River Basin and the Zhujiang River Basin.④The uniformity trend of annual runoff distribution is closely related to human activities in the basin.…”
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