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Dynamic Trends of Urban Flooding Mitigation Services in Shenzhen, China

1
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
2
State Key Laboratory of Urban and Regional Ecology, University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Sustainability 2020, 12(11), 4799; https://doi.org/10.3390/su12114799
Received: 4 May 2020 / Revised: 3 June 2020 / Accepted: 9 June 2020 / Published: 11 June 2020
(This article belongs to the Section Sustainable Urban and Rural Development)
Urbanization is characterized by population agglomeration and the expansion of impervious land surfaces. As a result of ongoing urbanization, rain and flood events have increasingly affected the well-being of residents in cities across the world. This should draw attention to the role of urban ecosystems in providing runoff retention/flood mitigation services. Focusing on Shenzhen, a major city in southern China, we used a hydrologic model based on the Soil Conservation Service curve number (SCS-CN) model to evaluate this flood reduction ecosystem service and its dynamic trends based on long-term remote sensing data from 1980 to 2018. We find that Shenzhen’s capacity for flood reduction gradually decreased due to changes in land use. The spatial distribution showed strong reduction capacity in the eastern part of the city and weak capacity in the western part. Additionally, the city’s total flood reduction capacity decreased by over 1.88 × 108 m3 over the past two decades. This loss of ecosystem-based flood reduction capacity undermines Shenzhen’s resilience against extreme weather events. Due to climate change, Shenzhen should advance its plan to build a “Sponge City” rooted in the conservation, restoration, and construction of urban ecological spaces. View Full-Text
Keywords: urbanization; flood mitigation; runoff retention; ecosystem service; Shenzhen; China urbanization; flood mitigation; runoff retention; ecosystem service; Shenzhen; China
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MDPI and ACS Style

Xu, D.; Ouyang, Z.; Wu, T.; Han, B. Dynamic Trends of Urban Flooding Mitigation Services in Shenzhen, China. Sustainability 2020, 12, 4799. https://doi.org/10.3390/su12114799

AMA Style

Xu D, Ouyang Z, Wu T, Han B. Dynamic Trends of Urban Flooding Mitigation Services in Shenzhen, China. Sustainability. 2020; 12(11):4799. https://doi.org/10.3390/su12114799

Chicago/Turabian Style

Xu, Dihang, Zhiyun Ouyang, Tong Wu, and Baolong Han. 2020. "Dynamic Trends of Urban Flooding Mitigation Services in Shenzhen, China" Sustainability 12, no. 11: 4799. https://doi.org/10.3390/su12114799

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