Addressing Waterlogging in Coastal Cities Amid Increasingly Extreme Weather: A Case Study of Beihai |
| Hongwei Chen1 Yujing Wei |
| 1. Beihai Water Conservancy Engineering Management Center, Beihai Guangxi 536000 , China；2. Guangxi Guiyu Engineering Consulting Co., Ltd., Nanning Guangxi 530023 , China |
| Abstract:With the intensification of global climate change, extreme rainfall events are occurring more frequently. Due to their unique geographical location and climatic conditions, coastal cities have become high-risk areas for waterlogging disasters. Beihai City in Guangxi, a significant coastal tourist destination in Southern China, faces multiple pressures including typhoon-induced rainstorms, storm surges, sea-level rise, and urban surface hardening, making its waterlogging problem increasingly prominent and severely constraining its sustainable development and public safety. This paper takes Beihai City as a case study. It begins by deeply analyzing the specific causes of its waterlogging issues, including the 胁迫 of extreme weather under climate change, the inherent vulnerability of its coastal geographical environment, the hydrological effects of rapid urbanization, and the capacity shortcomings of the existing drainage system. Based on this analysis, the paper proposes the construction of a comprehensive governance system characterized by "Ecology as the Foundation, Grey-Green Combination, Smart Empowerment, and Multi-level Resilience". This system integrates multiple strategies such as Sponge City initiatives (green infrastructure), upgrades to traditional grey infrastructure, smart water management, and Nature-based Solutions (NbS). Finally, tailored to Beihai's specific context, the paper proposes a phased and actionable implementation path alongside policy recommendations, aiming to provide theoretical reference and practical paradigms for similar coastal cities in China to address climate risks and enhance waterlogging prevention capacity. |
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Keywords：Coastal City; Urban Waterlogging; Climate Change; Sponge City; Resilient City; Smart Water Management;
Beihai City
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