THE　RIVER　CHANNEL　ADJUSTMENT　AS　INFLUENCED　BY　THE　FLOODPLAIN　GEOECOSYSTEM：　AN　EXAMPLE　FROM　THE　HONGSHAN　RESERVOIR  

作　　者：XU Jiongxin SHI Changxing( , Institute of Geography, Chinese Academy of Sciences, Beijing 100101, China)( Institute of Geography, Chinese Academy of Sciences. Beijing 100101, China.) 

出　　处：《International Journal of Sediment Research》1994年第3期224-231,共8页国际泥沙研究（英文版）

摘　　要：The concept of floodplain geoecosyStem has hen intfodutal to study the upstrcamdsmchannel adjustment, with the HongShan Reservoir as an example. Before alld after theconstruction of the HongShan Reservoir, the succession of the fioodplain geoecosyStem in thewide-valley river reach upstream the reservoir can be generalized as three stageS, namely, thesemi-desert gcoecosyStem, the marsh and swamp geoecosyStem and the agricultural ecosyStem.InfluenCed by the changing fioodplain gcoeresyStem, the Channel boundary material has benreformed greatly, and as a result, the Channel b￣mes wider alld narrower, and the Channelpattern has been transformed from a wandering braided to a meandering one.The concept of floodplain geoecosyStem has hen intfodutal to study the upstrcamdsmchannel adjustment, with the HongShan Reservoir as an example. Before alld after theconstruction of the HongShan Reservoir, the succession of the fioodplain geoecosyStem in thewide-valley river reach upstream the reservoir can be generalized as three stageS, namely, thesemi-desert gcoecosyStem, the marsh and swamp geoecosyStem and the agricultural ecosyStem.InfluenCed by the changing fioodplain gcoeresyStem, the Channel boundary material has benreformed greatly, and as a result, the Channel b￣mes wider alld narrower, and the Channelpattern has been transformed from a wandering braided to a meandering one.

关 键 词：Floodplain geoecosystem Post -dam channel adjustment Hongshan Reservoir. 

分 类 号：TV14[水利工程—水力学及河流动力学]