JOURNAL OF NATURAL RESOURCES ›› 2021, Vol. 36 ›› Issue (3): 771-782.doi: 10.31497/zrzyxb.20210317

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Water environmental response under varying implication of stormwater management measures: Based on cases in China

DENG Jin-ling1(), YIN Hai-wei2, QIU Shi2, ZHU Jie2, CHEN Jia-yu1, FEI Fan2, KONG Fan-hua1()   

  1. 1. International Institute for Earth System Sciences, Nanjing University, Nanjing 210023, China
    2. School of Architecture and Urban Planning, Nanjing University, Nanjing 210093, China
  • Received:2019-08-22 Revised:2019-11-25 Online:2021-03-28 Published:2021-05-28
  • Contact: KONG Fan-hua E-mail:gamlingdang@163.com;fanhuakong@163.com

Abstract:

Stormwater management measures can effectively control the runoff volume and rainwater pollutants. This study presented a systematic analysis of the impacts of stormwater management measures on runoff volume and pollutants in order to understand water environmental effects of stormwater management based on a meta-analysis method. A pool of studies identified by a literature search were analyzed to extract the information on the types of stormwater management measures, application scale, rainfall conditions, reduction rate of runoff volume and pollutants and to review the variation of runoff and pollutants under different stormwater management measures. The results of statistical analysis show that: (1) Different types of stormwater management measures generateed different water environment effects (e.g., green roof had the strongest runoff reduction capacity, while permeable pavement had the strongest runoff pollution reduction effect); (2) The impacts of stormwater management measures were scale-sensitive, namely, large areas had lower average rates of runoff reduction and small areas had lower average rates of pollutions reduction; (3) With the increase of rainfall, the capacity of stormwater management measures to reduce runoff and pollutant concentration showed a decreasing trend. Through the systematic analysis of existing cases, the research demonstrated differences in water environmental effects of controlling runoff volume and runoff pollutant, as well as the key factors behind such differences. The results can provide theoretical references for runoff regulation and runoff pollution treatment in stormwater management.

Key words: stormwater management measures, runoff, water quality, meta-analysis