生态清淤对于桥水库水质影响的数值模拟

详细信息    查看全文 | 推荐本文 |

英文篇名：Numerical simulation of the effects of the ecological dredging on water quality in Yuqiao Reservoir 作者：程扬 ; 赖锡军 英文作者：CHENG Yang;LAI Xijun;Key Laboratory of Watershed Geographic Science,Nanjing Institute of Geography and Limnology,Chinese Academy of Science;University of Chinese Academy of Sciences; 关键词：生态清淤 ; 水动力-营养物质输移模型 ; 富营养化 ; 于桥水库 英文关键词：ecological dredging;;hydrodynamic and nutrient transport model;;eutrophication;;Yuqiao reservoir 中文刊名：水资源与水工程学报 英文刊名：Journal of Water Resources and Water Engineering 机构：中国科学院南京地理与湖泊研究所中国科学院流域地理学重点实验室;中国科学院大学; 出版日期：2019-06-15 出版单位：水资源与水工程学报 年：2019 期：03 基金：国家水体污染控制与治理科技重大专项(2017ZX07603);; 中国科学院“一三五”重大突破项目(NIGLAS2018GH02) 语种：中文; 页：61-68 页数：8 CN：61-1413/TV ISSN：1672-643X 分类号：X524

摘要

以天津于桥水库为例,建立了考虑沉积物-水界面物质交换的二维水动力和营养物质输移模型,基于率定的参数模拟了不同水质背景条件下,水库库周清淤和全库清淤两种方案对水库中的氮、磷营养盐时空分布的影响。结果表明:模型能够可靠地模拟水库底泥氮、磷营养盐的动态释放及其与外界污染输入共同作用下水库的氮、磷营养盐的含量;底泥是于桥水库水体营养盐的重要来源,底泥清除后水库氮、磷营养盐含量均有所下降,但是不同方案的清淤效果存在差异。库周清淤对沿岸带的浅水区水体氮、磷有很好的改善作用,但对库区的整体改善效果不佳(<2%);而全库清淤后,整个库区水体的氮、磷含量均大幅下降(26%～48%),治理效果相对明显。
        Yuqiao Reservoir in Tianjin City was taken as an example in this paper,a two-dimensional hydrodynamic and nutrient transport model considering substance exchange across the sediment-water interface was developed. The effects of two different scopes of dredging on the temporal and spatial distribution of nitrogen and phosphorus nutrients in the reservoir under different water quality background were simulated based on calibrated parameters. The results demonstrated that: the established model could reliably simulate the dynamic release of nitrogen and phosphorus nutrient from lake sediment and its content under the combined influence from sediment release and external pollutant input; sediment was an important source of nutrients in Yuqiao Reservoir. The content of nitrogen and phosphorus nutrient in the reservoir would decreased after dredging,but different dredging schemes varied markedly. Dredging around the reservoir contributed much to water quality of shallow coastal waters but had little effect( < 2%) on the whole reservoir. Dredging the whole reservoir resulted in a significant decrease( 26% ～ 48%) of nitrogen and phosphorus nutrients in the reservoir which showed a relatively obvious improvement on water quality.

引文

[1]沈颜奕,陈星.城市湖泊生态系统健康评价与修复研究[J].水资源与水工程学报,2017,28(2):82-85+91.
    [2]李子成,邓义祥,郑丙辉.中国湖库营养状态现状调查分析[J].环境科学与技术,2012,35(S1):209-213.
    [3]Malecki L M,White J R,Reddy K R. Nitrogen and phosphorus flux rates from sediment in the lower St. Johns River estuary[J]. Journal of Environmental Quality,2004,33(4):15-45.
    [4]薄涛,季民.内源污染控制技术研究进展[J].生态环境学报,2017,26(3):514-521.
    [5]钟继承,范成新.底泥疏浚效果及环境效应研究进展[J].湖泊科学,2007,19(1):1-10.
    [6]单玉书,沈爱春,刘畅.太湖底泥清淤疏浚问题探讨[J].中国水利,2018(23):11-13.
    [7]原居林,沈锦玉,尹文林,等.应用浮游植物群落结构及富营养化指数评价南太湖底泥疏浚效果[J].水生态学杂志,2010,31(1):14-17.
    [8]王栋,孔繁翔,刘爱菊,等.生态疏浚对太湖五里湖湖区生态环境的影响[J].湖泊科学,2005,17(3):263-268.
    [9]徐媛,谢汝芹,卢蔚,等.于桥水库富营养化评价及空间分布特征研究[J].水资源与水工程学报,2014,25(1):1-6.
    [10]龚春生,姚琪,范成新,等.含内源污染平面二维水流-水质耦合模型[J].水利学报,2006,37(2):205-209+217.
    [11]龚春生,姚琪,赵棣华,等.浅水湖泊平面二维水流-水质-底泥污染模型研究[J].水科学进展,2006,17(4):496-501.
    [12]窦国仁.紊流力学[M].北京:人民教育出版社,1981.
    [13]赖锡军,姜加虎,黄群,等.鄱阳湖二维水动力和水质耦合数值模拟[J].湖泊科学,2011,23(6):893-902.
    [14]谭维炎.计算浅水动力学:有限体积法的应用[M].北京:清华大学出版社,1998.
    [15]ZHAO D H,SHEN H W,TABIOS G Q,et al. Finitevolume two-dimensional unsteady-flow model for river basins[J]. 1994,120(7):863-0.
    [16]文帅龙,龚婉晴,吴涛,等.于桥水库沉积物-水界面氮磷剖面特征及交换通量[J].环境科学,2018,39(5):2154-2164
    [17]姚重华.废水处理计量学导论[M].北京:化学工业出版社,2002.
    [18]狄贞珍,张洪,单保庆.太湖内源营养盐负荷状况及其对上覆水水质的影响[J].环境科学学报,2015,35(12):3872-3882.
    [19]吴芝瑛,虞左明,盛海燕,等.杭州西湖底泥疏浚工程的生态效应[J].湖泊科学,2008,20(3):277-284.
    [20]吴芝瑛,吴洁,虞左明.杭州西湖水生高等植物的恢复与水生生态修复[J].环境污染与防治,2005,27(1):38-40+46+2.
    [21]刘洪波,朱梦羚,王精志,等.水库水动力对水体富营养化影响[J].水资源与水工程学报,2013,24(2):19-21.