基于二维水流数学模型的江心洲防洪影响评价  

Flood control impact assessment of Jiangxin Island based on a two-dimensional hydraulic flow mathematical model

作　　者：王少冰 吕辉 韩会明 WANG Shaobing;LÜHui;HAN Huiming(Jiangxi Yuanhuiqu Project Management Bureau,Nanchang 330000,China;Power China Beijing Engineering Co.,Ltd.,Beijing 100020,China;Jiangxi Academy of Water Science and Engineering,Nanchang 330000,China)

机构地区：[1]江西省袁惠渠工程管理局,江西南昌330000 [2]中国电建集团北京勘测设计研究院有限公司,北京100020 [3]江西省水利科学院,江西南昌330000

出　　处：《水利建设与管理》2023年第11期17-21,共5页Water Conservancy Construction and Management

基　　金：江西省水利厅科技项目(202223YBKT02)。

摘　　要：在赣江某江心洲保护利用工程中,为评价该工程对河道防洪安全的影响,采用二维水流数学模型对其兴建前后的河道水位、流速进行了计算和对比分析。结果表明,在河峰型洪水P=5%条件下,拟建工程附近水位变化幅度为-4~5cm;拟建工程对计算河段的整体流场影响不大,对江心洲岛上及左、右汊局部流场有一定的影响,流速变化幅度为-26.3~22.5cm/s。该江心洲保护利用工程对其所处河段行洪安全的不利影响较小。In a protection and utilization project on Jiangxin Island in the Ganjiang River,an assessment of its impact on riverine flood safety is conducted by employing a two-dimensional hydraulic flow mathematical model to calculate and compare the water levels and flow velocities before and after its construction.The results indicate that under the condition of a 5%annual flood(P=5%),the projected construction has resulted in a water level change in the vicinity ranging from-4 to+5cm.The impact of the proposed construction on the overall flow field in the analyzed river section is relatively minimal,with some influence observed on the flow field in parts of Jiangxin Island and the left and right channels,where the velocity changes range from-26.3 to+22.5cm/s.The protection and utilization project on Jiangxin Island has a relatively minor adverse impact on flood safety in its respective river segment.

关 键 词：二维水流数学模型 防洪评价 江心洲 水位 流场 

分 类 号：TV131.2[水利工程—水力学及河流动力学]