4.7 Article

Robustness analysis of storm water quality modelling with LID infrastructures from natural event-based field monitoring

Journal

SCIENCE OF THE TOTAL ENVIRONMENT
Volume 753, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.scitotenv.2020.142007

Keywords

Robustness analysis; Stormwater quality; SWMM; Sponge city; Nash-Sutcliffe efficiency coefficient (NSE)

Funding

  1. National Natural Science Foundation of China [51979136]
  2. Innovation Project of Universities in Guangdong Province-Natural Science [2018KTSCX201]
  3. Science, Technology and Innovation Commission of Shenzhen Municipality [KQJSCX20180322152024270]

Ask authors/readers for more resources

This study evaluates the robustness of water quality modelling in sponge city construction using automatic calibration technique and field monitoring data. Results show that greenbelts and rain gardens perform the best, while barrels and green roofs are less robust. The modelling performance tends to be better under heavy rain and significant pollutant concentrations, indicating a potentially more stable and reliable design of infrastructures.
Sponge city construction (SCC) in China, as a new concept and a practical application of low-impact development (LID), is gaining wide popularity. Modelling tools are widely used to evaluate the ecological benefits of SCC in stormwater pollution mitigation. However, the understanding of the robustness of water quality modelling with different LID design options is still limited due to the paucity of water quality data as well as the high cost of water quality data collection and model calibration. This study develops a new concept of 'robustness' measured by model calibration performances. It combines an automatic calibration technique with intensive field monitoring data to perform the robustness analysis of storm water quality modelling using the SWMM (Storm Water Management Model). One of the national pilot areas of SCC, Fenghuang Cheng, in Shenzhen, China, is selected as the study area. Five water quality variables (COD, NH3-N, TN, TP, and SS) and 13 types of LID/non-LID infrastructures are simulated using 37 rainfall events. The results show that the model performance is satisfactory for different water quality variables and LID types. Water quality modelling of greenbelts and rain gardens has the best performance, while the models of barrels and green roofs are not as robust as those of the other LID types. In urban runoff, three water quality parameters, namely, SS, TN and COD, are better captured by the SWMM models than NH3-N and TP. The modelling performance tends to be better under heavy rain and significant pollutant concentrations, denoting a potentially more stable and reliable design of infrastructures. This study helps to improve the current understanding of the feasibility and robustness of using the SWMM model in sponge city design. (C) 2020 Elsevier B.V. All rights reserved.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.7
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available