Identifying the risk of urban nonpoint source pollution using an index model based on impervious-pervious spatial pattern

Liao Yunjie; Zhao Hongtao; Jiang Zhihui; Li Jia; Li Xuyong

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Identifying the risk of urban nonpoint source pollution using an index model based on impervious-pervious spatial pattern

机译：使用基于不透水透水空间模式的索引模型来确定城市非点源污染的风险

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Efficiently evaluating the risk of urban non-point source pollution (urban-NPS) using only a few parameters is crucial to its management and control, especially in engineering. However, the huge spatial heterogeneity of urban-NPS induced by the high spatial heterogeneity in land use, surface infiltration and surface micro-topography, make it difficult. A new index model composed of transport and source factors was proposed to evaluate the urban-NPS risk. An urban catchment in southern China served to demonstrate the proposed method. The ability of runoff output was characterized by the transport factor in which the impervious-pervious surface spatial pattern, imperviousness ratio and rainfall were taken into account. The pollutants output capacity was represented by source factor where the imperviousness ratio and source-sink transformation resulting from rainfall were considered. Results show the proposed index can identify and evaluate the risk of urban-NPS at both urban parcel scale and catchment scale. The percent bias (PBIAS) of runoff volume helped to assess the performance of the index. PBIAS (1-86%) between the proposed method and the observed runoff was much lower than that (27-448%) between the traditional runoff coefficient method and the observed runoff. These suggest that the proposed index offers a new way of assessing urban-NPS risk. (C) 2020 Elsevier Ltd. All rights reserved.

机译：有效地评估城市非点源污染的风险（USIL-NPS）只使用少数参数对于其管理和控制来说至关重要，特别是在工程中至关重要。然而，通过土地使用，表面浸润和表面微型造成的高空间异质性引起的城市-NP的巨大空间异质性使其变得困难。提出了一种由运输和源因子组成的新指数模型，以评估城市NPS风险。中国南部的城市集水区旨在展示拟议的方法。径流输出能力的特点是传输因素，其中考虑了不透明的表面空间模式，不渗透率和降雨。污染物输出能力由源极因素代表，其中考虑了降雨导致的不受渗透率和源水槽变换。结果表明，拟议指数可以识别和评估城市包裹规模和集水量表的城市NPS风险。径流卷的百分比（PBIAS）有助于评估索引的性能。所提出的方法与观察到的径流之间的PBIA（1-86％）远低于传统径流系数方法与观察到的径流之间的（27-448％）。这些表明，拟议的指数提供了一种评估城市NPS风险的新方法。（c）2020 elestvier有限公司保留所有权利。

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来源
《Journal of Cleaner Production》 |2021年第15期|125619.1-125619.12|共12页
作者
Liao Yunjie; Zhao Hongtao; Jiang Zhihui; Li Jia; Li Xuyong;
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Chinese Acad Sci State Key Lab Urban & Reg Ecol Res Ctr Ecoenvironm Sci Beijing 100085 Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

Chinese Acad Sci State Key Lab Urban & Reg Ecol Res Ctr Ecoenvironm Sci Beijing 100085 Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

Chinese Acad Sci State Key Lab Urban & Reg Ecol Res Ctr Ecoenvironm Sci Beijing 100085 Peoples R China;

Chinese Acad Sci State Key Lab Urban & Reg Ecol Res Ctr Ecoenvironm Sci Beijing 100085 Peoples R China;

Chinese Acad Sci State Key Lab Urban & Reg Ecol Res Ctr Ecoenvironm Sci Beijing 100085 Peoples R China|Univ Chinese Acad Sci Beijing 100049 Peoples R China;

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正文语种 eng
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关键词
Urban nonpoint source; Hotspot; Decision-making; Impervious-pervious spatial pattern; Sink source transformation;

机译：城市非点源;热点;决策;不透水的空间模式;水槽源转换;

Identifying the risk of urban nonpoint source pollution using an index model based on impervious-pervious spatial pattern

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