摘要
赣江在南昌河段首次分汊为东西两河,东西河分流比特性直接关系到下游河道的稳定和防洪安全.根据20世纪70年代以来多次实测的东西河分流比资料,东西河分流特性与流量、水位、两汊道过水条件、汊道比降等诸多因素密切相关.一般情况下,西河分流比随流量增大而减小,自2000年以来,相同流量下的西河分流比逐年增大.分流比与水位的相关关系表明:在相同水位条件下2,006―2008年的西河分流比较2003年普遍增大8%以上.2003年以来,西河口门入流条件和汊道内泄流能力均比东河明显改善和增强,导致了西河分流比迅速增大.
Ganjiang River divides into two branches in Nanchang Reach, and the flow diversion ratios of the east and the west branches relate directly to the stabilization and safety of downstream river channel. An analysis of the measured field data shows that, the flow diversion ratio is related to many factors such as discharge, water level, wet area, and hydraulic gradient. In general, the flow diversion ratio of the west branch decreased with the increase in discharge, and the ratio value under the same discharge augmented year by year since 2000. The correlation curves between flow diversion ratio and water level show that, the flow diversion ratio of the west branch from 2006 to 2008 increased by 8% as compared with the value in 2003 under the same water level. The infafl condition and flow away capacity of the west branch improved much more than that of the east branch since 2003, which made the diversion ratio of the west branch increase rapidly.
出处
《水利水运工程学报》
CSCD
北大核心
2011年第4期64-68,共5页
Hydro-Science and Engineering
基金
水利部公益性行业科研专项经费资助项目(200901005)
国家自然科学基金青年项目(50909037)
江西省水利厅科技项目
高等学校博士学科点专项科研基金新教师课题(200802941028)
中央高校基本科研业务费专项资金资助项目(2009B08014)
关键词
赣江南昌河段
分流比
流量
水位
Nanchang Reach in Ganjiang River
flow diversion ratio
discharge
water level
