A coupled hydrodynamic and particle-tracking model for full-process simulation of nonpoint source pollutants
A coupled hydrodynamic and particle-tracking model for full-process simulation of nonpoint source pollutants
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DOI：
10.1016/j.envsoft.2020.104951
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发表时间：
2020-12
期刊：
影响因子：
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通讯作者：
Jinghua Jiang;Q. Liang;X. Xia;J. Hou
中科院分区：
文献类型：
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作者：
Jinghua Jiang;Q. Liang;X. Xia;J. Hou
非点源(NPS)颗粒物是城市地表污染的主要来源。更好地了解和模拟NPS污染物的动态过程，对于制定有效的城市雨水管理和污染控制策略是至关重要的。本文提出了一种新颖的水动力与颗粒耦合模型，用于模拟城市非接触颗粒物污染物从分离、迁移到沉积的全过程动力学过程。提出了一种基于粒子的方法来描述污染物的分离和沉积的物理过程。利用随机游走粒子跟踪模型模拟了污染物颗粒的传输过程，该模型可以直接跟踪单个颗粒的轨迹，从而识别污染物的路径。新的基于水动力和颗粒耦合的雨水水质模型被成功地应用于多个分析和实验测试案例，以验证该模型能够准确地模拟城市地区NPS颗粒物污染物的全过程动态。
Nonpoint source (NPS) particulate pollutants are a major source of urban surface pollution. It is essential to better understand and model the dynamic process of NPS pollutants to inform the design of effective strategies for urban stormwater management and pollution control. This work presents a novel coupled hydrodynamic and particle-based model to simulate the full-process dynamics of NPS particulate pollutants from detachment, transport to deposition in urban areas. A particle-based approach is proposed to represent the physical processes of pollutant detachment and deposition. The transport of pollutant particles is simulated using a random-walk particle-tracking model, which can directly trace out the trajectories of individual particles and hence identify the pathways of pollutants. The new coupled hydrodynamic and particle-based stormwater quality model is successfully validated against several analytical and experimental test cases to demonstrate its capability in accurately simulating the full-process dynamics of NPS particulate pollutants in urban areas.