Reservoir sedimentation profoundly impacts riverbed dynamics and engineering applications, posing a dual challenge by compromising riverbed evolution and critical water storage infrastructure. The escalating loss of reservoir capacity due to sediment accumulation imperils lives, properties, and global water sustainability, undermining the reservoir’s safety role. Using the Three Gorges Reservoir (TGR) as a case study, we analyze extensive hydrological data from Cuntan, Qingxichang, Wanxian, and Miaohe stations (2002–2020). Our findings reveal: (1) Pre-impoundment, Qingxichang and Wanxian exhibit high sediment carrying capacities, which reduce noticeably during early impoundment. Subsequently, with the changes of pre-dam water levels, an overall decreasing trend of sediment-carrying capacity is observed, characterized by annual fluctuations, while Miaohe consistently maintains a lower level due to its proximity. (2) Wanxian experiences significant sediment carrying capacity reduction during constant water level periods of various operational stage, with up to 99.4% decrease post-impoundment. (3) Sediment carrying capacity varies annually primarily due to changes of reservoir pre-dam water levels, and secondarily, owing to incoming water and sediment fluctuations. Increased influx raises sediment carrying capacity, while reduced influx decreases it. Morphological cross-section configuration emerges as a dominant factor in sediment carrying capacity, outweighing dam proximity. Wide, shallow sections have lower capacity than narrow, deep ones. For narrow, deep sections, dam proximity’s influence exceeds cross-sectional morphology.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Spatio-temporal Distribution Patterns of Sediment Carrying Capacity in the Three Gorges Reservoir


    Weitere Titelangaben:

    Lecture Notes in Civil Engineering


    Beteiligte:
    Wang, Weiqiang (Herausgeber:in) / Wang, Chengzhi (Herausgeber:in) / Lu, Yang (Herausgeber:in) / Feng, Le (Autor:in) / Jin, Zhongwu (Autor:in) / Xu, Quanxi (Autor:in) / Liu, Ya (Autor:in) / Liu, Yujiao (Autor:in)


    Erscheinungsdatum :

    08.11.2024


    Format / Umfang :

    12 pages





    Medientyp :

    Aufsatz/Kapitel (Buch)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch







    About Architectural Aesthetics in the Three Gorges Reservoir Area Planning

    He, G.Q. | British Library Conference Proceedings | 2014


    Effect of Three Gorges Reservoir Backwater on Bed Load Transport Discharge of Chongqing Reach by Backwater of Three Gorges Reservoir in Upper Yangtze River

    Fu, X. H. / Yang, S. F. / Lan, Y. P. et al. | HENRY – Bundesanstalt für Wasserbau (BAW) | 2016

    Freier Zugriff

    Model Tests for Shallow-Water Ship Maneuverability in Three Gorges Reservoir

    Cai Chuang / Cai Xinyong / Li Yi | DOAJ | 2015

    Freier Zugriff