Effectiveness of low-impact development for urban inundation risk mitigation under different scenarios: a case study in Shenzhen, China

摘要: Abstract. The increase in impervious surfaces associated with rapid urbanization is one of the main causes urban inundation. Low-impact development (LID) practices have been studied for mitigation This study used a hydrodynamic inundation model, coupling SWMM (Storm Water Management Model) and IFMS-Urban (Integrated Flood Modelling System–Urban), to assess effectiveness LID under different scenarios at hazard levels. results showed that LID practices can effectively reduce maximum inundation depth was reduced by 3 %–29 %, average inundation areas were reduced by 7 %–55 %, time by 0 %–43 % under eight scenarios. differed three levels, better of urban low level than high level. Permeable pavement (PP) mitigated green roofs (GRs) under the We found more implementation area LID not necessarily efficient, scenario of 10 %  PP+10  % GR efficient area other scenarios. this be local governments to provide suggestions control, disaster reduction, and urban renewal.