滨江游乐场人工湖水体富营养化整治措施研究
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摘要
针对我国城市河流水体污染严重、富营养化频发等突出问题,以镇江市典型游乐场景观河流魔幻海洋世界为例,构建粒子追踪、水动力和水质及富营养化数值模型,模拟了无引水、泵引、自引对水动力、水质的改善情况,结果表明:粒子在3种风向下的停留时间为东风>东南风>南风,其中粒子在东风下最大停留时间为125 h,在东南风下最大停留时间为115 h,在南风下最大停留时间为95 h;无引水时,3个风向条件下中心景观湖区流速均较小,沿岸水深较浅处受风速影响较大,在不同风向下呈现出稍大流速;泵引时,连续泵引30 h的水质好于20 h;自引时,引江河道与人工湖水位差Δh越大,人工湖水质越好。
Aiming at solving the outstanding problems such as the serious pollution of urban rivers in China and the frequent occurrence of eutrophication,a numerical model of particle tracking,hydrodynamics,water quality and eutrophication was constructed. Taking the Magical Ocean World,a typical playground landscape river in Zhenjiang City as an example,the improvement of hydrodynamics and water quality without water diversion,pumping,and self-diversion was simulated. The results showed that the residence time of particles in the three winds was east wind > southeast wind > south wind. The maximum residence time of particles in the east wind was 125 h,the maximum residence time in the southeast wind was 115 h,and the maximum residence time in the south wind was 95 h. When there is no water diversion,the velocity of the central landscape lake area was smaller under the three wind field conditions,and the water depth at the coast was more affected by the wind speed than at the shallow depth,and slightly higher velocity was shown downward in different winds. With pumping,the water pumped continuously for 30 h was better than that of 20 h. For self-diversion,the greater the difference Δh between the water level of the river and the artificial lake,the better the water quality of the artificial lake.
Aiming at solving the outstanding problems such as the serious pollution of urban rivers in China and the frequent occurrence of eutrophication,a numerical model of particle tracking,hydrodynamics,water quality and eutrophication was constructed. Taking the Magical Ocean World,a typical playground landscape river in Zhenjiang City as an example,the improvement of hydrodynamics and water quality without water diversion,pumping,and self-diversion was simulated. The results showed that the residence time of particles in the three winds was east wind > southeast wind > south wind. The maximum residence time of particles in the east wind was 125 h,the maximum residence time in the southeast wind was 115 h,and the maximum residence time in the south wind was 95 h. When there is no water diversion,the velocity of the central landscape lake area was smaller under the three wind field conditions,and the water depth at the coast was more affected by the wind speed than at the shallow depth,and slightly higher velocity was shown downward in different winds. With pumping,the water pumped continuously for 30 h was better than that of 20 h. For self-diversion,the greater the difference Δh between the water level of the river and the artificial lake,the better the water quality of the artificial lake.
引文
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[2]SONG Weiwei,XU Qing,FU Xingqian,et al. Research on the relationship between water diversion and water quality of Xuanwu Lake,China.[J]. International Journal of Environmental Research&Public Health,2018,15(6):1262-1288.
[3]WANG Xue,PANG Yong,WANG Xiao,et al. Study of water environmental cumulative risk assessment based on control unit and management platform application in plain river network[J]. Sustainability,2017,9(6):975-991.
[4]NIU Yong,NIU Yuan,YU Hui,et al. Concentration distribution and toxicity of heavy metals in surface sediment of poyang lake,China[J]. Wetlands,2017(2):1-8.
[5]张鹏飞,岳烨,侯嫔,等.人工湖水体富营养化的活性炭处理技术及生态修复建议[J].水资源与水工程学报,2017,28(2):92-98.
[6]姜龙杰,陈琳,邱云鹏,等.溧水水库型饮用水水源地水环境现状及污染源分析[J].水资源与水工程学报,2017,28(5):93-99.
[7]李一平,邱利,唐春燕,等.湖泊水动力模型外部输入条件不确定性和敏感性分析[J].中国环境科学,2014,34(2):410-416.
[8]王瑶瑶,逄勇,黄亚文,等.围隔导流对太湖蓬坑湾藻类富集效能的影响[J].水资源与水工程学报,2015,26(6):42-47.
[9]毕良芹,逄勇,罗缙.落蓬湾断面水质达标及胥河水环境容量研究[J].水资源与水工程学报,2017,28(5):124-128.
[10]刘一童,逄勇,肖洵.南京市鼓楼区入江断面水质达标方案的研究[J].水资源与水工程学报,2018,29(3):99-104.
[11]宋为威,逄勇.秦淮河流域控源截污与生态补水联合效应研究[J].水力发电学报,2018,37(1):31-39.
[12]张鹏,逄勇,石成春,等.闽江下游水质变化趋势分析[J].水资源保护,2018,34(1):64-69.
[13]宋为威,逄勇.基于国考七桥瓮断面水质达标秦淮河流域水环境容量计算[J].中国农村水利水电,2017(10):80-84.