Simulation and control of non-point source pollution based on MIKE model: A case study of Danjiang river basin, China

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology Pub Date : 2023-10-01 DOI:10.1016/j.ecohyd.2023.08.001

Kai Peng, Jiake Li, Xiang Zhou, Huaien Li, Weifeng Xie, Ke Zhang, Zakir Ullah

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引用次数: 3

Abstract

In the world, non-point source (NPS) has become one of the important factors affecting the water environment and water ecological security in the basin. In this paper, we investigate the response of runoff to pollution loads by establishing the MIKE SHE and MIKE HYDRO River coupled model with the Danjiang river basin as the research object; The MIKE LOAD is used to analyze the spatial and temporal distribution characteristics of agricultural NPS pollution and to perform equivalence load analysis of pollutants in the basin; Single and combined control measures are set up to simulate the reduction effect of each pollutant for NPS pollution control in the basin. The results show that daily runoff has a high correlation with daily pollution loads of ammonia nitrogen (NH₃-N) and total phosphorous (TP); The pollution load of Jingziguan section calculated by the coupled model is comparable with the results calculated by MIKE LOAD, and the relative error is below 30%, and the simulation results are reasonable. The trend of the load into the river for all pollutants is consistent with the rainfall and generally shows the characteristics of high loads in flood season and low loads in non-flood season. The total emissions of NPS pollutants in the basin are TN>NH₃-N>TP>COD, and the loads share of the four pollutants are 52.82%, 21.31%, 19.42% and 6.44% respectively. Four single and one combination measures are set up to evaluate the pollutant reduction effects. The reduction effect of combined measures is significantly better than that of single measures.

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基于 MIKE 模型的非点源污染模拟与控制：中国丹江流域案例研究

在世界范围内，非点源已成为影响流域水环境和水生态安全的重要因素之一。本文以丹江流域为研究对象，建立了MIKE SHE和MIKE HYDRO河耦合模型，研究了径流对污染负荷的响应;利用MIKE LOAD分析了流域农业NPS污染的时空分布特征，并对流域污染物进行了等效负荷分析;设置单一和组合控制措施，模拟各污染物对流域NPS污染控制的减排效果。结果表明:日径流量与日氨氮(NH3-N)和总磷(TP)污染负荷呈高度相关;耦合模型计算的荆子关断面污染负荷与MIKE load计算结果具有可比性，相对误差在30%以下，模拟结果合理。各污染物入江负荷的变化趋势与降雨趋势一致，总体上表现为汛期高负荷、非汛期低负荷的特征。流域NPS污染物排放总量为TN>、NH3-N>、TP>、COD, 4种污染物的负荷份额分别为52.82%、21.31%、19.42%和6.44%。建立了4项单项措施和1项组合措施来评价污染物减排效果。综合措施的减少效果明显优于单一措施。

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来源期刊

Ecohydrology & Hydrobiology Agricultural and Biological Sciences-Aquatic Science

CiteScore

5.40

自引率

3.80%

发文量

期刊介绍： Ecohydrology & Hydrobiology is an international journal that aims to advance ecohydrology as the study of the interplay between ecological and hydrological processes from molecular to river basin scales, and to promote its implementation as an integrative management tool to harmonize societal needs with biosphere potential.