城市化对洪涝孕灾环境的影响与应对探讨OA

To address the increasingly severe rainstorm flooding and urban waterlogging challenges in China,this study systematically examined the impacts of large-scale urbanization on extreme flood events under climate change and explored urban and regional flood prevention strategies within evolving disaster-formative environments.The results indicate that rapid urbanization has substantially altered flood and waterlogging disaster-formative environments through increased impervious surface coverage,degradation of river networks,disruption of hydrological connectivity,and reduced watershed storage and regulatory capacity,thereby significantly modifying runoff generation,flow concentration processes,and overall flood characteristics.Urbanization further induces microclimatic modifications,including the urban heat island and rain island effects,which influence rainfall characteristics in terms of frequency and intensity within urbanized areas.Meanwhile,the concentration of population and economic activities in urban areas has prompted many cities to construct large-scale flood control systems,including sluice gates and pumping stations,accompanied by progressively enhanced flood control and drainage standards.However,due to insufficient integrated planning and scientifically coordinated scheduling,these measures have,to some extent,intensified flood management conflicts among urban and suburban areas,adjacent cities,and broader regions.Therefore,it is essential to maintain appropriate river network density within urbanized areas,optimize river network structure,coordinate the construction and operation of urban water conservancy projects,and integrate disaster compensation mechanisms with comprehensive flood risk management to mitigate flood hazards in rapidly urbanizing regions.This study provides a theoretical foundation and practical reference for the integrated governance of urban flood risks.