超标准洪水下鄱阳湖单退圩和蓄滞洪区联合分洪运用研究  

Study on joint operation of semi-restoration polder and detention and retention area for flood diversion in Poyang Lake under extreme flood conditions

作　　者：邹佳宇 温天福 顾平[2] 李港 雷声 王志超 刘鑫 鄢煜川 ZOU Jiayu;WEN Tianfu;GU Ping;LI Gang;LEI Sheng;WANG Zhichao;LIU Xin;YAN Yuchuan(Jiangxi Academy of Water Science and Engineering,Nanchang 330029,China;School of Infrastructure Engineering,Nanchang University,Nanchang 330031,China;Key Laboratory of River and Lake Management and Flood Control in the Middle and Lower Reaches of the Changjiang River of MWR,Wuhan 430010,China;Poyang Lake Water Control Project Construction Office of Jiangxi Province,Nanchang 330009,China)

机构地区：[1]江西省水利科学院,江西南昌330029 [2]南昌大学工程建设学院,江西南昌330031 [3]水利部长江中下游河湖治理与防洪重点实验室,湖北武汉430010 [4]江西省鄱阳湖水利枢纽建设办公室,江西南昌330009

出　　处：《水利水电科技进展》2025年第2期54-62,68,共10页Advances in Science and Technology of Water Resources

基　　金：水利部重大科技项目(SKS-2022010);江西省水利科技项目(202325ZDKT14,202224ZDKT20,202124ZDKT02);长江科学院开放研究基金项目(CKWV20231164/KY);江西省技术创新引导类科技计划项目(20223AEI91008)。

摘　　要：为合理启用单退圩和蓄滞洪区,有效降低鄱阳湖的洪水水位,基于MIKE21建立鄱阳湖及五河尾闾二维水动力模型,采用同频率法放大2020年鄱阳湖大洪水得到超标准洪水,通过设置单退圩和蓄滞洪区的启用水位形成9种组合方案并模拟其分洪运用过程,分析得出优选方案及其经济损失情况。结果表明:单退圩启用水位为21.50 m(保护面积万亩以下)、22.30 m(保护面积万亩以上),蓄滞洪区启用水位为22.50 m时,单退圩和蓄滞洪区分洪量分别为26.17亿m^(3)和25.69亿m^(3),最大24 h降低水位为0.37 m和0.25 m,对鄱阳湖的分洪效果最佳;启用48 h后,单退圩的农业直接经济损失为2.09亿元,蓄滞洪区损失为4.17亿元,其中康山蓄滞洪区损失为1.54亿元。To reasonably activate the semi-restoration polder(SRP)and detention and retention area(DRA)and effectively reduce the water level of Poyang Lake,a two-dimensional hydrodynamic model of Poyang Lake and the downstream sections of its five tributaries was established using MIKE21.The extreme flood event was simulated by amplifying the 2020 Poyang Lake flood using the same-frequency method.Nine combination schemes were formulated by setting different activation water levels for SRP and DRA,and the flood diversion processes were simulated.The optimal scheme and its associated economic losses were further analyzed.The results indicate that the optimal flood diversion effect is achieved when the SRPs are activated at water levels of 21.50 m(for protection areas under 10000 mu)and 22.30 m(for protection areas above 10000 mu)and the DRAs are activated at water level of 22.50 m.Under this scheme,the flood diversion volumes for the SRPs and DRAs are 2.617 billion m^(3) and 2.569 billion m^(3),respectively,with maximum 24-hour water level reductions of 0.37 m and 0.25 m,respectively.After 48 hours of activation,the direct agricultural economic loss for the SRPs is 209 million yuan,while the loss for DRAs is 417 million yuan,of which the loss for the Kangshan DRA is 154 million yuan.

关 键 词：单退圩 蓄滞洪区 降低水位 洪水损失 鄱阳湖 

分 类 号：TV87[水利工程—水利水电工程]