Effects of Low-Impact Development Facilities (Water Systems of the Park) on Stormwater Runoff in Shallow Mountainous Areas Based on Dual-Model (SWMM and MIKE21) Simulations

Yue Lai, Yiyun Lu, Tingting Ding, Huiyi Sun, Xuanying Li and Xiaoyu Ge ()
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Yue Lai: School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China
Yiyun Lu: Chengdu Park Urban Construction and Development Research Institute, Chengdu 610000, China
Tingting Ding: School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China
Huiyi Sun: School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China
Xuanying Li: School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China
Xiaoyu Ge: School of Landscape Architecture, Beijing Forestry University, Beijing 100083, China

IJERPH, 2022, vol. 19, issue 21, 1-22

Abstract: Rapid urbanization has triggered more serious urban flood risks. Many studies have focused on intra-urban flooding, but less attention has been paid to rainfall and flood risks at the urban fringe. Nowadays, China is vigorously promoting the construction of sponge cities in the whole area. It is important to study the construction of sponge cities in shallow mountainous areas, which are an important barrier between cities and mountains. The purpose of this paper is to investigate the performance of Low-Impact Development (LID) facilities under different rainfall scenarios in developed shallow mountainous areas. The second garden and flower exposition (“the Expo Park”) in Hebei Province is used as an example. The SWMM and MIKE21 models were used to simulate the hydrological processes before and after the construction of “the Expo Park”, and the models were calibrated with the measured data. Peak flow rate, outflow volume, rainfall-outflow ratio, runoff velocity, and water feature area of the water system were used as indicators to evaluate their effectiveness. The results showed that the placement of LID facilities had a positive impact on the construction of the shallow mountain area. Specifically, (1) LID facilities can reduce the peak flow rate, delayed peak flow time, outflow volume, and rainfall outflow ratio of stormwater runoff in mountainous areas; and (2) they can effectively collect rainwater and become a supplement to the landscape water system of the site. These findings provide a scientific basis for the construction of LID facilities in shallow mountainous areas, which is important for the development and flood management of shallow mountainous areas.

Keywords: shallow mountainous areas; stormwater management; low-impact development; 1D SWMM model; 2D MIKE21 model (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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