Simulation and Optimization Strategy of Storm Flood Safety Pattern Based on SCS-CN Model.

Xinhong Cai,Dawei Xu

doi:10.3390/ijerph19020698

Abstract

The contradiction between rapid urbanization’s demand for land resources and the ecological environment is increasing, which has led to large-scale hardening of the underlying surface of the city and reduction of land for storage. In addition, construction land occupies rainwater confluence land, resulting in a significant decline in urban stormwater control capabilities. The increasingly frequent flood disasters in recent years have exposed the contradiction between urban construction and stormwater safety that cannot be ignored. Therefore, this article takes the central city of Harbin as the research object, uses ArcGIS for spatial analysis and SCS (Soil Conservation Service) hydrological model simulation to construct the rain and flood safety pattern in the research area, and proposes targeted optimization suggestions and strategies based on the evaluation results to achieve the purpose of coordinating the water ecosystem service function with social and economic development. The research shows that protecting the original stormwater corridor and strengthening the connection between the stormwater control patches can effectively guarantee the connectivity of the stormwater corridor, build the natural stormwater regulation and storage system, and then increase the ability of the city to resist the risk of rainstorm, reduce the disaster caused by urban waterlogging, and achieve the goal of sponge city construction.

Highlights

As an important strategic resource of regional development, water is closely related to the social economy and human settlements; it is a key element of sustainable urban development
In 2021, the occurrence of the devastating floods in Zhengzhou and the occurrence of heavy rain disasters in Shanxi Province forced the implementation of the goal of building a security pattern to accelerate
The rain and flood safety pattern is a part of the water security pattern research while the water security pattern is a part of the ecological security pattern research

Summary

Introduction

As an important strategic resource of regional development, water is closely related to the social economy and human settlements; it is a key element of sustainable urban development. The ecological security pattern is a concept proposed by Kongjian Yu based on the theory of landscape ecology in 1996 [9]. The water security pattern belongs to a section of the ecological security pattern research which focuses on the spatial pattern set with water ecological elements It is based on the research and analysis of hydrological effects within a specific time and space range, which when guided by water security issues, and coupled research on water resources, water ecology, water environment, and water disasters [13], through a comprehensive multi-disciplinary and multi-perspective analysis of the key spatial unit elements to protect water safety, the effective spatial configuration of the key elements is realized [14].

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Results