江苏省车轴河感潮河段建闸调水减淤方案优化研究  

Optimization study on schemes to reduce downstream deposition by operation of sluice in tidal reach of Chezhou River,Jiangsu Province

作　　者：周成洋 杨啸宇 王逸飞 缴健[2] ZHOU Chengyang;YANG Xiaoyu;WANG Yifei;JIAO Jian(Jiangsu Huaishuxin River Management Office,Huai′an 223005,China;Port and Navigation Channel Sediment Transport Lab.,MOT,Nanjing Hydraulic Research Institute,Nanjing 210029,China)

机构地区：[1]江苏省淮沭新河管理处,江苏淮安223005 [2]南京水利科学研究院港口航道泥沙工程交通行业重点实验室,江苏南京210029

出　　处：《人民长江》2023年第7期159-165,共7页Yangtze River

基　　金：江苏省水利科技项目(2021029);河口海岸保护与治理创新团队(Y220013)。

摘　　要：针对感潮河段挡潮闸闸下淤积问题,通过实施挡潮闸调水可以达到减淤目的。为了满足河床不淤和生态环境需水要求,通过构建江苏省连云港市车轴河闸二维水沙数学模型,研究了不同调水方案对于闸下淤积的影响,并进行方案比选。结果表明:保持车轴河河床不淤的日均下泄流量为1.28 m^(3)/s,车轴河生态环境需水量为0.88 m^(3)/s,因此保持车轴河不淤的流量可满足生态流量要求。在洪季水量充足的情况下,可采取全天闸门常开方案,流量为3.0 m^(3)/s时对下游河床的减淤效果提升显著。在枯季水量较少时,可采取在涨急时段开闸方案,流量取8.0~18.0 m^(3)/s,相对落急时段开闸方案,涨急时开闸对闸门稳定的影响较小且减淤范围较大。The deposition under tidal sluice can be reduced by discharging water from the sluice.By constructing a two-dimensional hydro-sediment mathematical model for the Chezhou River in Lianyungang City of Jiangsu Province,we investigated the impact of different water diversion schemes on sediment deposition at the downstream of the sluice and conducted a comparative analysis on the proposed schemes to meet the requirements of maintaining a deposition-free riverbed and ecological flow demand.The results showed that the daily average discharge to keep the riverbed from depositing was 1.28 m^(3)/s,and eco-environmental flow demand was 0.88m^(3)/s.Therefore,the daily average discharge could meet the ecological demand.During the period of abundant flow in flood season,a constant gate opening scheme with a discharge rate of 3.0 m^(3)/s significantly improved the sediment reduction effect at the downstream.During the period of low flow in the dry season,a whole day opening scheme during the tide rising stage with a discharge from 8.0 to 18.0 m 3/s was recommended.Compared to the opening gate during the falling stage,the gate operation scheme in the tide rising stage exhibited minimal impact on gate stability while achieving a larger range of sediment reduction.

关 键 词：挡潮闸 数值模拟 生态环境需水 调水方案 感潮河段 

分 类 号：TV131.2[水利工程—水力学及河流动力学]