摘要
三峡工程运行后,长江荆江河段防洪标准达到100年一遇,为洞庭湖松滋口建闸提供了有利条件。本文通过运用长江和洞庭湖水沙数学模型,对再现1998、1935和1954年典型洪水时进行数值模拟计算,从建闸后长江中游防洪情势、与澧水错峰调度效果以及泥沙淤积趋势等方面分析了松滋口建闸防洪影响。结果表明,松滋口建闸对洞庭湖区防洪作用明显,对荆江河段防洪影响不大,对城汉河段防洪有积极作用,闸前河段泥沙淤积厚度略有增加,对其他河段冲淤变化影响不大。
After operation of Three Gorges project, flood control of the Yangtze River in the urban area of Jingzhou city can meet the standard of 100-year frequency flood, providing favorable conditions for building a sluice at the Songzi outlet of Dongting Lake. To analyze the impact of flood control by the Songzi sluice, numerical simulations of typical floods in 1935, 1954 and 1998 were made in this work, by using the flow and sediment mathematical model of the Yangtze River and Dongting Lake. The present study focuses on three issues： the flood control situation of the middle Yangtze under the operation of the sluice, the effect of peak- alternation regulation on the Lishui River, and the tendency of sediment deposition. The results show that operation of Songzi sluice has significant impact on flood control in the Dongting area, but insignificant in the urban area of Jingzhou. This is favorable to flood control of the Yangtze in the Chenghan reach. Besides, it will cause a slight increase in sediment deposition before the sluice, while insignificant influence on sediment erosion-deposition in the other river reaches.
出处
《水力发电学报》
EI
CSCD
北大核心
2013年第1期156-162,186,共8页
Journal of Hydroelectric Engineering
基金
水利部公益性行业科研专项(20081008)
关键词
水力学
防洪
长江
洞庭湖
松滋口建闸
hydraulics
flood control
Yangtze River
Dongting lake
building a sluice at Songzi
