摘要
宜昌枯水水位的变化直接关系到葛洲坝船闸能否正常运行.三峡蓄水以来,虽然宜昌以下河段发生了较大幅度的冲刷,但枯水时期同流量下宜昌水位并未出现明显降幅,引起众多专家学者与部门的高度重视.目前,对于其维持稳定的机理尚不十分明确.本文通过分析葛洲坝下游卡口河段的几何特性、冲淤特性及阻力特性,并利用一维数学模型进行计算分析,初步认为卡口河段的控制性作用对宜昌枯水水位的稳定具有重要的影响.
The change of Yichang water level in dry season has a direct impact on the function of Gezhouba ship lock. The construction of the Three Georges Reservoir （TGR） on the Yangtze river had caused a huge amount of sediment erosion in down stream reach since 2003, but the Yichang water level hadn＇t dropped in dry season. And this phenomenon has draw wide concerns of many experts and navigation departments. At present, the reason why Yichang water level kept stable was not well understood. The primary analysis of the Bottle-neck reach downstream from Gezhouba, including its geometric, scour-silting and resistance characters, was presented in this paper, and then 1-D dimensional mathematic flow model was applied to analyze the impact of the bottle-neck reach on upstream water level. At last the primary conclusion that the function of the bottle-neck reach was the main reason why Yichang water level in dry season had kept stable was concluded.
出处
《应用基础与工程科学学报》
EI
CSCD
2007年第4期435-444,共10页
Journal of Basic Science and Engineering
基金
国家"973"项目资助(2003CB415200)
关键词
卡口河段
宜昌枯水水位
浅滩
bottle-neck reach
yichang water level in dry season
shoal
