Development of the Emergy-Gis Method of Selecting Areas for Sponge-Like Urban Reconstruction

Abstract

The theory of sponge city has been attracting extensive attention in addressing urban waterrelated issues especially in China. We discussed on the emergy-GIS method of selecting areas for spongelike urban reconstruction in Shenzhen, with four main concerns including data source, neglecting the issue of urban waterlogging, potential inaccuracies in emergy calculations and indices in selecting key areas. The corresponding suggestions and solutions are developed including the rational selection of precipitation and anthropogenic heat, consideration of land use types in assumption of the first 50% of stormwater runoff, incorporation of areas with high risk of waterlogging, methods for emergy calculations of runoff and runoff pollution, scientific choice of indices and integration of local planning and actions. This study could help improve the emergy method integrated with GIS in the application of sponge city studies.

Dynamic Trends of Urban Flooding Mitigation Services in Shenzhen, China

“…The city's rainy season runs from April to September. Shenzhen has reported 278 urban flood-prone points, which contribute to large economic and human losses [23].…”