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引用本文:朱伟,薛宗璞,刘环,程林,张昱,赵帅,冯甘雨,王若辰.引水工程出水路线的优化对太湖总磷格局的影响——基于新孟河工程的思考.湖泊科学,2022,34(4):1175-1185. DOI:10.18307/2022.0411
Zhu Wei,Xue Zongpu,Liu Huan,Cheng Lin,Zhang Yu,Zhao Shuai,Feng Ganyu,Wang Ruochen.Effects of outlet paths on total phosphorus in Lake Taihu-Optimization analysis of Xinmeng River's outlet path. J. Lake Sci.2022,34(4):1175-1185. DOI:10.18307/2022.0411
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引水工程出水路线的优化对太湖总磷格局的影响——基于新孟河工程的思考
朱伟1, 薛宗璞2, 刘环3, 程林1, 张昱1, 赵帅1, 冯甘雨1, 王若辰1
1.河海大学环境学院, 南京 210098;2.河海大学水文水资源学院, 南京 210098;3.河海大学土木与交通学院, 南京 210098
摘要:
“新孟河引水”作为“二引三排”格局的关键组成,将长江水直接引入太湖的竺山湖区,在新的引排格局下,“新孟河引水”对太湖水环境尤其是总磷会有怎样的影响?针对“新孟河引水”工程,如何设计出水路线才能趋利避弊,改善太湖总磷?本文实测并收集了2007—2020年太湖的水文水质数据为基础,模拟了不同路线对太湖分湖区总磷的影响,力求将“新孟河引水”对太湖的影响进行一个清晰的分析,并为形成最为合理的出水路线提供支撑.结果表明:太湖不同湖区对出水路线的响应不同.从单一出水路线的角度来看,新孟河引水后,太浦闸增加出水会使得太湖西北部浊水加快来到太湖东南部,对太湖东南部有不利的影响.而梁溪河或新沟河出水的西北小循环是“新孟河引水”工程优化出水路线,在降低竺山湖、梅梁湖总磷的同时,没有恶化太湖东南部水质,对太湖总磷也有降低的效果.在应用中可以组合各种出水路线,形成联动方案.从物料平衡的角度看,太湖底泥目前仍是磷汇.引水后4种出水路线年均滞留量为1435 t,其中出水河道设置在东太湖(太浦闸)磷滞留量最大,年滞留1513 t;出水河道设置在梅梁湖(新沟河、梁溪河)磷滞留量最小,年滞留1404 t左右.
关键词:  引江济太  太湖  出水路线  总磷  数值模拟  新孟河引水
DOI:10.18307/2022.0411
分类号:
基金项目:江苏省社会发展-重大科技示范项目(BE2018737)和江苏省研究生培养创新工程研究生科研创新计划项目(B200203049)联合资助.
Effects of outlet paths on total phosphorus in Lake Taihu-Optimization analysis of Xinmeng River's outlet path
Zhu Wei1, Xue Zongpu2, Liu Huan3, Cheng Lin1, Zhang Yu1, Zhao Shuai1, Feng Ganyu1, Wang Ruochen1
1.College of Environment, Hohai University, Nanjing 210098, P. R. China;2.College of Hydrology and Water Resources, Hohai University, Nanjing 210098, P. R. China;3.College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, P. R. China
Abstract:
As a key component of the pattern of "two diversions and three drainages", the "water transfer through Xinmeng River" project directly brings water from the Yangtze River into Lake Zhushan. What will be the impact of "water transfer through Xinmeng River" on the water environment of Lake Taihu? How to design optimal outlet paths for the "water transfer through Xinmeng River" to reduce the total phosphorus level in Lake Taihu? We measured and collected the hydrological and water quality data of Lake Taihu from 2007 to 2020, and simulated the influence of different outlet paths on the total phosphorus in different districts of Lake Taihu. We strive to make a clear analysis of the influence of "water transfer through Xinmeng River" on Lake Taihu, and support the formation of the most reasonable outlet path. The result shows that different districts of Lake Taihu have different responses to outlet paths. From the perspective of a single outlet path, after the diversion from Xinmeng River, the increased discharge of Taipu river will accelerate the turbid water from the northwest Lake Taihu to the southeast Lake Taihu, which will have adverse effects on the southeast Lake Taihu. The northwest small circulation of Liangxi River or Xingou River is the better outlet path of "water transfer through Xinmeng River " project. In this way, it reduces the total phosphorus in Lake Zhushan and Lake Meiliang, while maintaining the water quality of southeast Lake Taihu, and reducing the total phosphorus in Lake Taihu. Various outlet paths can be combined in the application to form a linkage scheme. From the material balance point of view, the sediment of Lake Taihu is still a phosphorus sink at present. The average annual phosphorus retention of the four outlet paths after water diversion is 1435 t, from which the outlet channel set in East Lake Taihu (Gate Taipu) has the largest annual phosphorus retention of 1513 t. The outlet channel set in Lake Meiliang (Xingou River and Liangxi River) has the minimum annual phosphorus retention of about 1404 t.
Key words:  Water transfer from Yangze River to Lake Taihu  Lake Taihu  outlet path  total phosphorus  numerical simulation  water transfer through Xinmeng River
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