Economic loss of urban waterlogging based on an integrated drainage model and network environ analyses

Abstract

In this study, an economic loss assessment framework was proposed to evaluate the economic losses of urban waterlogging based on the integrated catchment management (ICM) model and information-based network environ analysis (NEA). First, the urban waterlogging model was constructed based on the ICM model to simulate the submerged depth, inundated area and duration of waterlogging. Second, the initial waterlogging risk of different economic sectors was combined with the submerged depth-disaster loss rate curve. Last, the information-based NEA was employed to quantify the distributed control relationships among different economic sectors. The results of a case study of Beijing showed that direct economic loss can reach 16.3 billion yuan in a recurrence period of once in 50 years. Forty percent of the waterlogging risk was transferred to the downstream regions or sectors via the national supply chain. The proposed economic loss assessment framework may help promote waterlogging prevention strategies.