Journal of Hydraulic Engineering. 2014, (01) Core

Impacts of Three Georges Reservoir’s operation on outflow of the three outlets of Jingjiang River and Dongting LakeChinese Full Text

FANG Chun-ming;HU Chun-hong;CHEN Xu-jian;China Institute of Water Resources and Hydropower Research,State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin;

Abstract: Observation data of the Jingjiang river reach after the operation of the Three Georges Reservoir shows that the scoring process of this river reach is slowing down,and the scoring volume will be about 900×106m3at 2022. After the operation of the Three Georges Reservoir,water stage of Jingjiang at lower discharge has been going down with declining rate,and the water stage at large discharge is almost stable. Water stage descent amount at lower discharge has a good relation with the total scouring volume of Jingjiang,and it is used to predict the water stage decent in the future. Up to 2010,for all discharge of Jingjiang,the corresponding discharge capacity of the three outlets did not show obvious change,but the flow regulation of the Three Georges Reservoir has reduced runoff of the three outlets by about 7%. The Three Georges Reservoir’s impounding after the flood season also lowers the water stage of the Dongting Lake, and makes the dry season coming about a month earlier. After the cascade reservoirs in the Jinsha River put into operation in the future,the situation will be more severe. More attention should be paid to the Three Georges Reservoir’s impact on outflow of the three outlets and the water stage of Dongting Lake, and to study on measures.

Keywords：

Three Georges Reservoir; Jingjiang River; the three outlets;

DOI：
10.13243/j.cnki.slxb.2014.01.005
Series：
Subject：
Classification Code：
TV12;TV697

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Impacts of Three Georges Reservoir’s operation on outflow of the three outlets of Jingjiang River and Dongting LakeChinese Full Text

FANG Chun-ming;HU Chun-hong;CHEN Xu-jian;China Institute of Water Resources and Hydropower Research,State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin;

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