摘要
根据三峡工程运用前后的实测水文资料,分析了松滋口分流分沙的年际、年内变化规律及其成因,并研究了三峡工程蓄水以来松滋口分沙比递增的缘由.研究表明,影响松滋口分流分沙最直接的两个因素是口门附近水位和口门高程;三峡工程运用后松滋口年内分流和分沙量更集中在6—9月,10月的分流分沙量均明显减少,但年分流比的变化不大,松滋口口门河道冲刷引起该口门分沙比递增;并预计未来一段时间内松滋口分流比将变化不大,如扣除口门河道冲刷的影响,则分沙比仍将变化不大.
According to the hydrological data measured before and after the impounding of the Three Gorges Reservoir, the intra-annual and inter-annual variation rules of runoff and sediment diversion of Songzikou were analyzed. The reasons of increasing the sediment diversion of Songzikou were also explored in this paper. Results show that the direct factors on runoff and sediment diversion were the riverbed elevation of Songzikou and the Changjiang water level nearby. After the operation of the Three Gorges Reservoir, the intra-annual distribution of runoff and sediment diversion were more concentrated from June to September with less in October, however,the annual ratio of runoff had litter change. Erosion along the river caused increasing the sediment diversion, the flow diversion of Songzikou will change little after operation of the Three Gorges Project;If excluding the impact of erosion entrance of the river, the sediment diversion also change little.
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2014年第3期457-468,共12页
Journal of Basic Science and Engineering
基金
十二五国家科技支撑(2012BAB04B03)
水利部公益性行业科研专项(201401011)
国家自然科学基金重点项目(51339001)
关键词
三峡工程
松滋口
分流分沙比
特性
Three Gorges Project
Songzikou
the runoff and sediment diversion ratios
features
