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引用本文:王钟,范中亚,杨忠勇,王文才,张恒军,曾凡棠.“引江济淮”工程对安徽菜子湖水龄分布的影响.湖泊科学,2018,30(6):1576-1586. DOI:10.18307/2018.0609
WANG Zhong,FAN Zhongya,YANG Zhongyong,WANG Wencai,ZHANG Hengjun,ZENG Fantang.Effects of Water Diversion Project from the Yangtze River to Huaihe River on the water age distribution of Lake Caizi, Anhui Province. J. Lake Sci.2018,30(6):1576-1586. DOI:10.18307/2018.0609
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“引江济淮”工程对安徽菜子湖水龄分布的影响
王钟1,2, 范中亚2,3, 杨忠勇1, 王文才2, 张恒军2, 曾凡棠2
1.三峡大学水利与环境学院, 宜昌 443000;2.环境保护部华南环境科学研究所, 水环境研究中心, 广州 510655;3.河海大学环境学院, 南京 210098
摘要:
菜子湖是"引江济淮"工程的重要输水通道,其水体输运和物质交换将因输水工程发生改变.本文基于环境流体水动力学模型(EFDC)建立了菜子湖水龄模型,在将模型与实测水文数据验证满足精度的前提下,设计14种方案计算菜子湖在季风影响下的水龄,工程实施期间菜子湖在丰、平、枯季的水龄与流场,以及枯水季调水情景下同风速8种风向和强风向3种风速时的水龄.数值试验的模拟结果表明:菜子湖湖体水龄分布具有时空差异性,无风条件下,春、夏、秋、冬季的湖体的平均水龄分别为120.93、33.19、92.92、101.48 d,而在季风影响下,春、夏、秋、冬季平均水龄分别为75.23、32.45、81.80、66.16 d;西部L2湖水龄较长,东部L1湖和南部L3湖水龄较短;输水工程将改变L1和L3湖的流场,对L2湖流场几乎无影响;输水工程实施后,菜子湖水龄分布主要受风场及输水影响,不同风向对菜子湖各湖区影响不同,西南风有助于L1湖水体交换,北风有助于L2湖水体交换,东风有助于L3湖水体交换,而当风向为东北风时,3个湖区水龄均较小;枯水季调水有利于L1湖和L3湖水体交换,但对L2湖水体交换作用不明显.
关键词:  “引江济淮”工程  菜子湖  EFDC模型  水龄
DOI:10.18307/2018.0609
分类号:
基金项目:中央级公益性科研院所基本科研业务专项(PM-zx703-201701-005)和东江流域饮用水源型河流水质安全保障技术集成与综合示范项目(2014ZX07206005)联合资助.
Effects of Water Diversion Project from the Yangtze River to Huaihe River on the water age distribution of Lake Caizi, Anhui Province
WANG Zhong1,2, FAN Zhongya2,3, YANG Zhongyong1, WANG Wencai2, ZHANG Hengjun2, ZENG Fantang2
1.College of Water Conservancy and Environment, China Three Gorges University, Yichang 443000, P. R. China;2.Research Center of Water Environment, South China Institute of Environmental Science, Ministry of Environment Protection of PRC, Guangzhou 510655, P. R. China;3.College of Environment, Hohai University, Nanjing 210098, P. R. China
Abstract:
Lake Caizi is an extremely important channel of Water Diversion Project from the Yangtze River to Huaihe River. The transportation and exchange of water bodies of Lake Caizi will be changed significantly due to the water conveyance project. Based on the Environmental Fluid Hydrodynamic Model (EFDC), the water age model of Lake Caizi was established in this paper. On the premise of validating the simulated and measured hydrological data, 14 schemes were designed to calculate the water ages of Lake Caizi under the influence of the monsoon, the water ages and flow field of Lake Caizi in the flood season, the normal season, and the dry season during the implementation period, along with the water ages under the eight wind directions with the same wind speed and the three wind speeds with the strong wind direction under the waterdiversion scenario of the dry season. Numerical simulation results show that:the distribution of the water ages in Lake Caizi has the space-time characteristics. In the absence of wind conditions, the average ages of Lake Caizi in spring, summer, autumn and winter were 120.93, 33.19, 92.92 and 101.48 d, respectively. Rather, under the influence of monsoon, the average water ages in spring, summer, autumn, and winter were 75.23, 32.45, 81.80 and 66.16 d, respectively. The water ages of Lake L2 in the west is long, while that of Lake L1 in the east and Lake L3 in the south shorter; The water diversion project will change the flow field of Lake L1 and Lake L3 and have little effect on the flow field of Lake L2; After the water diversion project is implemented, the water ages distribution of Lake Caizi is mainly affected by wind field and water conveyance. Different wind directions may have different impacts on the different lake districts of Lake Caizi. The southwest wind helps exchange water body of the Lake L1, the north wind helps to exchange the water body of the Lake L2, and the east wind aids the exchange of the water of the Lake L3. When the wind direction is northeast wind, the water ages of three lake regions are all relatively small. The water diversion during the dry season is beneficial to the exchange of water between the Lake L1 and the Lake L3, but the water exchange effect on Lake L2 is not obvious.
Key words:  Water Diversion Project from the Yangtze River to Huaihe River  Lake Caizi  EFDC model  water age
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