摘要
近50年实测水沙资料分析表明,城陵矶水位变化取决于螺山—汉口河段冲淤量.三峡蓄水后,螺山—汉口河段冲淤量又取决于宜昌下泄和宜昌—城陵矶河段冲起的粗沙量(d>0.085mm)及汉口(扣除汉江)粗沙输沙量.通过估算三峡蓄水后宜昌—城陵矶河段粗沙冲刷量和汉口(扣除汉江)粗沙输沙量,表明螺山—汉口河段最大冲刷约9.5×108t,螺山流量为10000—60000m3/s时,城陵矶水位下降约1.26—0.32m,并且随着螺山流量的增大,城陵矶水位下降幅度减小.
By analysing field data of the last 50 years, it was found that the changes of water level at Chenglingji station depended on the erosion or deposition volume of Luoshan--Hankou reach. and after the operation of TGP, the erosion volume of Luoshan--Hankou reach came down to discharge of coarse sand （ d 〉 0. 085mm） from Yichang station, Yichang--Chenglingji reach and Hankou （excluding Hanjiang ） station. Through estimating the erosion amount of coarse sand from Yichang--Chenglingji reach and the discharge of coarse sand from Hankou （ excluding Hanjiang） Hankou reach is 0.95 station, it is found that the maximum erosion amount of Chenglingji- billion tons. When the discharge at Luoshan station is 10000-60000 m^3/s, the water level at Chenglingji will drop by 1.26-0. 32m from before the operation of the TGP. Moreover, the decline of water level at Chenglingji station will decrease as the discharge at Luoshan increases.
出处
《应用基础与工程科学学报》
EI
CSCD
2010年第2期273-280,共8页
Journal of Basic Science and Engineering
基金
国家重点基础研究资助项目(2003CB415200)
关键词
三峡工程
城陵矶
水位
冲刷
Three Gorges Project
Chenglingji
water level
erosion
