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项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8000～17000m^3/s，且横江流量大于1000m^3／s时的范围内，其水位壅高幅度一般在0．44～1．5m范围内变化。
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. ②The 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 m^3/s and the discharge of Hengjing River is more than 1 000 m^3/s, and the raised water level of Xianziiaba Hydrological Station is 0. 4-1.5 m.
出处
《节水灌溉》
北大核心
2009年第4期65-68,共4页
Water Saving Irrigation
基金
国家自然科学青年基金项目(50609007)
水资源与水电工程科学国家重点实验室(武汉大学)开发基金资助项目(2006B028)
国家科技支撑计划项目(2006BAC05B03-02)
关键词
向家坝
一期围堰河段
水位变化
横江洪水
顶托
Xiangjiaba Project
first-stage cofferdam＇s reach
variation of water level
inflow from Hengjiang River
backwater
