Rainfall-runoff risk characteristics of urban function zones in Beijing using the SCS-CN model
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.
KeywordsSCS-CN model urban function zone spatial cluster runoff risk
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- Atkinson S, 2012. A storm water runoff investigation using GIS and remote sensing [D]. Unviersity of North Texas.Google Scholar
- Fu S H, Wang H Y, Wang X L et al., 2013. The runoff curve number of SCS-CN method in Beijing. Geographical Research, 32(5): 797–807. (in Chinese)Google Scholar
- Gajbhiye S, Mishra S, 2012. Application of NRSC-SCS curve number model in runoff estimation using RS & GIS, International Conference on Advances in Engineering, Science and Management, IEEE, 346–352.Google Scholar
- GB50014, 2013. Code for Design of Outdoor Wastewater Engineering. (in Chinese)Google Scholar
- Jarden K M, Jefferson A J, Grieser J M, 2015. Assessing the effects of catchment-scale urban green infrastructure retrofits on hydrograph characteristics. Hydrological Processes, 291(1): 6–14.Google Scholar
- NRCS, 1986. Urban hydrology for small watersheds. Technical Release, 55: 2–6.Google Scholar
- Pan A, Zhang S, Meng Q et al., 2009. Initial concept of stormwater and flood management in Beijing city. China Water & Wastewater, 25(22): 9–12. (in Chinese)Google Scholar
- Su M, Zheng Y, Hao Y et al., 2017. The influence of landscape pattern on the risk of urban water-logging and flood disaster. Ecological Indicators, doi:10.1016/j.ecolind.2017.03.008Google Scholar
- Wang Q, Zhang X, Wei M et al., 2011. Research summary of planning and design standards for storm water system in Beijing city. Water & Wastewater Engineering, 37(10): 34–39.Google Scholar