汛期横江入流对向家坝一期围堰河段水位的顶托影响_纪昌明.pdfVIP

节水灌溉2009 年第4 期 65 : 1007 4929( 2009) 04 006504 纪昌明, 苏学灵, 彭 杨 ( , 102206) : 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 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 水位顶 托影响主要发生在金沙江洪水过程的涨水 , 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 3 3 量为8 000~ 17 000 m / s, 且横江流量大于 1 000 m / 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 : 向家坝; 一期围堰河 ; 水位变化;横江洪水; 顶托 :T V551. 11; TV 131. 4 : A Backwater Effects of Inflow from Hengjiang River in Flood Period on the Water Level in the Firststage Cofferdams Reach of the Xiangjiaba Project I Changming, SU Xueling, PENG Yang ( Water cience Research Institut e, chool of Renewable Energy, North China Electric Pow er University , Beijing 102206, China) Abstract: In this paper, the backwater effect of inflow from Hengjiang River in flood period on the w ater level in the first- stage cof ferdams reach of the Xiangjiaba Project is analyzed through observed data and model calculation based on BP artificial nearal net w ork. Conclusions are finally obt ained as follow ing : Inflow f rom H engjiang River will affect t he w ater level of the reach the Xiangjiaba Projec at rising limb of flood from Jinsha River . The flood from H engjing River w ill affect the w ater level of Xiangjiaba 3 Hydrological tation when the flood discharge of Pinshan hydrological station is 8 000~ 17 000 m / s and the discharge of H engjing 3 River is more than 1 000 m / s, and the raised water level of Xiangjiaba Hydrological tation is 0.4~ 1. 5 m. Key words: Xiangjiaba Project; firs