Journal of Geographical Sciences ›› 2018, Vol. 28 ›› Issue (5): 656-668.doi: 10.1007/s11442-018-1497-6

• Research Articles • Previous Articles     Next Articles

Rainfall-runoff risk characteristics of urban function zones in Beijing using the SCS-CN model

Lei YAO1(), Wei WEI2, Yang YU2, Jun XIAO2, Liding CHEN2,*()   

  1. 1. College of Geography and Environment, Shandong Normal University, Jinan 250014, China
    2. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, CAS, Beijing 100085, China
  • Received:2017-05-08 Accepted:2017-06-28 Online:2018-03-30 Published:2018-03-30
  • Contact: Liding CHEN E-mail:alex_yaolei@126.com;liding@rcees.ac.cn
  • About author:

    Author: Yao Lei (1989-), PhD, specialized in landscape ecology and urban hydrological process.E-mail: alex_yaolei@126.com

    *Corresponding author: Chen Liding (1965-), PhD and Professor, specialized in landscape ecology.
    E-mail: liding@rcees.ac.cn

  • Supported by:
    National Natural Science Foundation of China, No.41701206;The Major Program of National Natural Science Foundation of China, No.41590841

Abstract:

Urbanization significantly increases the risk of urban flooding. Therefore, quantitative study of urban rainfall-runoff processes can provide a scientific basis for urban planning and management. In this paper, the built-up region within the Fifth Ring Road of Beijing was selected as the study area. The details of land cover and urban function zones (UFZs) were identified using GIS and RS methods. On this basis, the SCS-CN model was adopted to analyze the rainfall-runoff risk characteristics of the study area. The results showed that: (1) UFZs within different levels of runoff risk varied under different rainfall conditions. The area ratio of the UFZs with high runoff risk increased from 18.90% (for rainfall return period of 1a) to 54.74% (for period of 100a). Specifically, urban commercial areas tended to have the highest runoff risk, while urban greening spaces had the lowest. (2) The spatial characteristics of the runoff risks showed an obvious circular distribution. Spatial cluster areas with high runoff risk were mainly concentrated in the center of the study area, while those with low runoff risk were mainly distributed between the fourth and fifth ring roads. The results indicated that the spatial clustering characteristic of urban runoff risk and runoff heterogeneity among different UFZs should be fully considered during urban rainwater management.

Key words: SCS-CN model, urban function zone, spatial cluster, runoff risk