Waterlogging risk assessment based on land use/cover change: a case study in Pudong New Area, Shanghai

Abstract

Waterlogging induced by torrential rain or typhoon in urban areas due to rapid urban development and land cover changes has been a global hotspot and a potential risk affecting urban habitant lifelines and safety. This paper analyzed the impact of land use/cover change on the surface runoff and evaluated the waterlogging risk caused by precipitation with different intensities in Pudong New Area, Shanghai. A simplified urban waterlogging model has been built for the inundated water depth simulation through the combination of both SCS model and GIS spatial analysis with the consideration of underlying surface characters in urban area. Based on the simulated depth results, waterlogging risk ranks were further established to evaluate waterlogging risk of Pudong New Area under different conditions considering social survey results. The results show that the land use structure and pattern change increases surface runoff depth. Under the assumption of a daily maximum precipitation at 200 mm, the surface runoff depth increased by 13.19 mm from 1994 to 2006 due to urbanization. On the whole, Heqing, Huaxia tourism area, Chuansha, Tangzhen and Jichang Town have high waterlogging risk rank, Gaoqiao, Donggou, urban district, Jinqiao, Caolu, Sanlin and Beicai Town have medium waterlogging risk rank, and Zhangjiang, Gaodong and Huamu Town have low waterlogging risk rank. These results provide important information for the local government, and the method of waterlogging risk assessment can also be applied in other cities to provide guidance on waterlogging risk control.

Coupling Modified Linear Spectral Mixture Analysis and Soil Conservation Service Curve Number (SCS-CN) Models to Simulate Surface Runoff: Application to the Main Urban Area of Guangzhou, China

“…Water body was first masked before implementing the LSMA process. Then, the CN value of water was provided individually and set to 100 in this study followed the work of Quan et al [56]. Referring to the previous works [30,48], the CN values of the impervious surface for different hydrologic soil groups are set combining the impervious surface range, shown in Figure 10.…”

Effects of Impervious Surface on the Spatial Distribution of Urban Waterlogging Risk Spots at Multiple Scales in Guangzhou, South China

“…Due to global climate change and rapid urbanization, urban waterlogging has become a serious problem in urban areas worldwide [4,5]. This has resulted in socio-environmental problems such as property damage, traffic paralysis, water pollution and economic losses [6][7][8], especially in rapidly developing countries [3]. In China, approximately 62% of Chinese cities suffered from urban waterlogging especially in larger cities such as Beijing, Shanghai, Guangzhou and Wuhan [9].…”

Early warning information system for land degradation hazards in New Suez Canal region, Egypt

“…One of these impacts is a water-logged area. Waterlogged area which is an environmental issue is found throughout the world (Chowdary et al 2008;Minar et al 2013;Quan et al 2010;Qureshi et al 2008) and Egypt (Omran 2012a(Omran , b, 2016. These threats are bringing on significant issues influencing a huge number of hectares of land either directly or indirectly, not only affecting the soil but also leaving the soil to cause contamination to water bodies.…”