Assessment and time-space difference analysis of sponge city construction potential: A case study in Jiangsu, China

This paper constructs a sponge city construction potential evaluation index system, uses a variable fuzzy recognition model to evaluate the construction level of sponge cities in 13 prefecture-level cities in Jiangsu Province from 2013 to 2019, and analyses its dynamic evolution trend based on Kernel density estimation. The analysis shows that the construction potential of sponge city in Jiangsu Province shows an overall upward trend, and the potential levels of 13 cities can be divided into three camps: Suzhou, Wuxi, Nanjing, Nantong and Changzhou are the first camps with higher potential; Yangzhou, Zhenjiang and Taizhou are the second camp of medium level; Xuzhou, Huai'an, Suqian, Yancheng and Lianyungang are the third camp of lower level. The overall situation is a trend of 'big in the south and small in the north'. On this basis, the advantages and disadvantages of different cities and their development directions were further clarified, and a certain reference for promoting the construction of sponge city was provided.