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Position: Home > Articles > Backwater Effects of Inflow from Hengjiang River in Flood Period on the Water Level in the First-stage Cofferdam's Reach of the Xiangjiaba Project Water Saving Irrigation 2009 (4) 68-71

汛期横江入流对向家坝一期围堰河段水位的顶托影响

作  者:
纪昌明;苏学灵;彭杨
单  位:
华北电力大学可再生能源学院水科学研究所
关键词:
向家坝;一期围堰河段;水位变化;横江洪水;顶托
摘  要:
为保证向家坝一期围堰工程汛期安全度汛,对汛期横江入流的向家坝一期河段水位的顶托影响进行了研究。研究时首先采用实测资料对横江洪水的顶托影响进行分析,在此基础上,采用BP神经网络对不同横江来流下向家坝水文站的水位变化进行预测,给出向家坝水文站的水位壅高幅度。结果表明:横江洪水对向家坝河段水位顶托影响主要发生在金沙江洪水过程的涨水段,一期围堰修建后向家坝水文站受横江来水顶托影响主要发生在屏山流量为8000~17000 m3/s,且横江流量大于1000 m3/s时的范围内,其水位壅高幅度一般在0.44~1.5 m范围内变化。
译  名:
Backwater Effects of Inflow from Hengjiang River in Flood Period on the Water Level in the First-stage Cofferdam's Reach of the Xiangjiaba Project
作  者:
JI Chang-ming,SU Xue-ling,PENG Yang (Water Science Research Institute,School of Renewable Energy,North China Electric Power University,Beijing 102206,China)
关键词:
Xiangjiaba Project;first-stage cofferdam's reach;variation of water level;inflow from Hengjiang River;backwater
摘  要:
In this paper,the backwater effect of inflow from Hengjiang River in flood period on the water level in the first-stage cofferdam's reach of the Xiangjiaba Project is analyzed through observed data and model calculation based on BP artificial nearal network.Conclusions are finally obtained as following: ①Inflow from Hengjiang River will affect the water level of the reach the Xiangjiaba Projec at rising limb of flood from Jinsha River.② The flood from Hengjing River will affect the water level of Xiangjiaba Hydrological Station when the flood discharge of Pinshan hydrological station is 8 000~17 000 m3/s and the discharge of Hengjing River is more than 1 000 m3/s,and the raised water level of Xiangjiaba Hydrological Station is 0.4~1.5 m.

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