The Effect of Urban Land-Use Change on Runoff Water Quality: A Case Study in Hangzhou City

Li Li, Qidi Yu, Ling Gao, Bin Yu and Zhipeng Lu
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Li Li: School of Public Affairs, Zhejiang University, Hangzhou 310058, China
Qidi Yu: School of GeoSciences, University of Edinburgh, Edinburgh EH9 3FE, UK
Ling Gao: Wang Yanan Institute for Studies in Economics, Xiamen University, Xiamen 361005, China
Bin Yu: Department of Economics, University of Essex, Colchester CO4 3SQ, UK
Zhipeng Lu: School of Public Affairs, Zhejiang University, Hangzhou 310058, China

IJERPH, 2021, vol. 18, issue 20, 1-12

Abstract: The main functions of this research are to guide the proportion of urban land that is used and the layout of the facilities on it, help understand the changes to surface runoff that are caused by land being used in urban development, and thus solve surface runoff pollution. Hangzhou City, China has been selected for the experiment, and the way in which its land is utilized as well as the grading of urban construction projects in the demonstration area are specifically analyzed. This study systematically distinguishes the definitions of impervious area based on the Sutherland equation and analyzes the impact of different impervious area subtypes on surface runoff water quality. Then, we compare the impact of impervious area subtypes with the impact of other land-use patterns on surface runoff water quality. This study shows the relationship between different land-use types and runoff water bodies: Land-use index can affect runoff water quality; Greening activities, impervious surface, and the water quality index are negatively correlated; the effective impervious area rate is positively correlated with the water quality index. The paper suggests that increasing the proportion of green spaces and permeable roads in build-up land reduces the effective impervious area (EIA) and thus controls land runoff pollution and improves runoff water quality.

Keywords: land-use change; surface runoff; water pollution; urban facilities (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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