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Decentralized Coupled Grey–Green Infrastructure for Resilient and Cost-Effective Stormwater Management in a Historic Chinese District

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Publicado en:Water vol. 17, no. 15 (2025), p. 2325-2350
Autor principal: Liu, Yongqi
Otros Autores: Xiong Ziheng, Wang, Mo, Zhang Menghan, Adnan Rana Muhammad, Fu Weicong, Sun Chuanhao, Tan Soon Keat
Publicado:
MDPI AG
Materias:
China
Water quality
Load
Capital costs
Discount rates
Construction
Floods
Stormwater management
Optimization
Drainage
Sustainability
Storms
Layouts
Architecture
Hydrology
Integrated approach
Historic preservation
Green infrastructure
Hydraulics
Rain
Green roofs
Cultural heritage
Acceso en línea:Citation/Abstract
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Resumen:Coupled grey and green infrastructure (CGGI) offers a promising pathway toward sustainable stormwater management in historic urban environments. This study compares CGGI and conventional grey infrastructure (GREI)-only strategies across four degrees of layout centralization (0%, 33.3%, 66.7%, and 100%) in the Quanzhou West Street Historic Reserve, China. Using a multi-objective optimization framework integrating SWMM simulations, life-cycle cost (LCC) modeling, and resilience metrics, we found that the decentralized CGGI layouts reduced the total LCC by up to 29.6% and required 60.7% less green infrastructure (GI) area than centralized schemes. Under nine extreme rainfall scenarios, the GREI-only systems showed slightly higher technical resilience (Tech-R: max 99.6%) than CGGI (Tech-R: max 99.1%). However, the CGGI systems outperformed GREI in operational resilience (Oper-R), reducing overflow volume by up to 22.6% under 50% network failure. These findings demonstrate that decentralized CGGI provides a more resilient and cost-effective drainage solution, well-suited for heritage districts with spatial and cultural constraints.
ISSN:2073-4441
DOI:10.3390/w17152325
Fuente:Publicly Available Content Database