ABSTRACT
In recent years, urban flooding has frequently occurred in China, necessitating the urgent optimization and renovation of urban drainage systems. This study promotes the construction of pilot sponge cities and explores a LID strategy for the historic district of Chuanghua Street in Guangzhou with the help of an SWMM model. The study aims to explore a design approach for sponge construction measures in the urban drainage system and a feasible path to saponification micro-renovations. The waterways heritage and water safety approach of the region was built considering the problems of rainfall and flooding that the historic centre is currently facing. Through design simulation and visualization analysis, the regional water environment can be comprehensively optimized to achieve the goal of a resilient neighbourhood. This study sorts out the changes in the water system pattern and historical culture of Changhua Street in Guangzhou. Then it proposes a sponge transformation strategy suitable for the local environment and cultural resources under the historical, cultural and hydrological security pattern. And through the SWMM model, two generalized models of the original base and the pattern after comprehensive sponge planning are constructed, and the effect of ecological maintenance is verified by visual simulation.
