Exploring the network structure of coupled green-grey infrastructure to enhance urban pluvial flood resilience: A scenario-based approach focusing on 'centralized' and 'decentralized' structures

被引：5

作者：

Park, Samuel ^{[1
,2
]}

Kim, Jaekyoung ^{[7
,8
]}

Yun, Hyeryeong ^{[5
]}

Kang, Junsuk ^{[3
,4
,5
,6
]}

机构：

[1] Seoul Natl Univ, Res Ctr Reg Climate Crisis Response, Seoul 08826, South Korea

[2] Purdue Univ, Lyles Sch Civil Engn, W Lafayette, IN 47907 USA

[3] Seoul Natl Univ, Interdisciplinary Program Landscape Architecture, Seoul 08826, South Korea

[4] Seoul Natl Univ, Transdisciplinary Program Smart City Global Conver, Seoul 08826, South Korea

[5] Seoul Natl Univ, Dept Landscape Architecture & Rural Syst Engn, Seoul 08826, South Korea

[6] Seoul Natl Univ, Res Inst Agr & Life Sci, Seoul 08826, South Korea

[7] Gangneung Wonju Natl Univ, Dept Environm Landscape Architecture, Kangnung 25457, South Korea

[8] Seoul Natl Univ, Res Inst Agr & Life Sci, Seoul 08826, South Korea

来源：

JOURNAL OF ENVIRONMENTAL MANAGEMENT | 2024年 / 370卷

基金：

新加坡国家研究基金会;

关键词：

Betweenness centrality; Coupled green-grey infrastructure; Loosely-connected network; Network density; Network modularity; Urban flood resilience; LOW IMPACT DEVELOPMENT; INUNDATION; MODEL; PERFORMANCE; RUNOFF;

D O I：

10.1016/j.jenvman.2024.122344

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Urban pluvial floods pose a significant risk to cities, occurring when precipitation exceeds the carrying capacity of the urban drainage network. Coupled green-grey infrastructure has emerged as a sustainable solution for mitigating urban pluvial floods. This study aims to explore best practices in the network configuration of urban drainage systems coupled with low-impact development (LID) to enhance flow distribution and stormwater infiltration. To do so, we focused on two competing key concepts in network analysis: (1) Centralization and (2) Decentralization. We integrated a one-dimensional stormwater model with a rapid flood spreading model to assess the flood mitigation performance of various centralized and decentralized network configurations in the Gangnam region of Seoul, South Korea. To further assess the combined effects of green and grey infrastructure, we compared the performance of each drainage network configuration with and without identical mixed LID practices. Here we show that the centralized drainage network scenario performed best in reducing flood volume by 40.3%, the decentralized drainage network scenario performed best in shortening flood duration by 47.8%, and the LID practices scenario performed best in mitigating peak flooding rates by 4.2%, each as independent scenarios. When all three scenarios were coupled together, flood volume could be reduced by 73.5%, flood duration by 54.7%, and peak flooding rates by 19.8% in the study area. This exploratory study underscores the potential of network analysis in urban flood research, particularly the effectiveness of loosely-connected network topology. Our findings contribute to the development of best practices for coupled green-grey infrastructure, facilitating sustainable stormwater management and urban flood resilience.

引用

页数：17