A Simple GIS-Based Model for Urban Rainstorm Inundation Simulation

Abstract

With rapid urbanization, floods that occur are more frequently associated with non-riverine, urban flooding. Reliable and efficient simulation of rainstorm inundation in an urban environment is profound for risk analysis and sustainable development. Although sophisticated hydrodynamic models are now available to simulate the urban flooding processes with a high accuracy, the complexity and heavy computation requirement render these models difficult to apply. Moreover, a large number of input data describing the complex urban underlying surfaces is required to setup the models, which are typically unavailable in reality. In this paper, a simple and efficient urban rainstorm inundation simulation method, named URIS, was developed based on a geographic information system (GIS) with limited input data. The URIS method is a simplified distributed hydrological model, integrating three components of the soil conservation service (SCS) module, surface flow module, and drainage flow module. Cumulative rainfall-runoff, output from the SCS model, feeds the surface flow model, while the drainage flow module is an important waterlogging mitigation measure. The central urban area of Shanghai in China was selected as a study case to calibrate and verify the method. It was demonstrated that the URIS is capable of characterizing the spatiotemporal dynamic processes of urban inundation and drainage under a range of scenarios, such as different rainstorm patterns with varying return periods and different alterations of drainage diameters. URIS is therefore characterized with high efficiency, reasonable data input, and low hardware requirements and should be an alternative to hydrodynamic models. It is useful for urgent urban flood inundation estimation and is applicable for other cities in supporting emergency rescue and sustainable urban planning.

Modeling Urban Flood Inundation and Recession Impacted by Manholes

“…Despite well-documented effects of manholes on urban flooding [19,20,37,41,42], there exists relatively limited research [43][44][45][46][47] that directly incorporate manhole overflow in simulations of urban flooding. Chen et al [48] used coupled surface and sewer flow modeling and found approximately 2 m surge flow from manholes.…”

Evaluación Del Riesgo De Inundación Empleando Un Sistema De Información Geográfica Y Modelamiento Hidráulico Aplicados Al Río La Leche Lambayeque

“…Epistemia,Vol. 6(2) 63 Luego se procedió con la secuencia de la investigación según se muestra en la figura 2, el cual inició con la aplicación del sistema de información geográfica, después se realizó el análisis de extremos de caudales máximos y finalmente el modelamiento hidráulico para generar los mapas de potenciales inundaciones, tal y como lo sugieren en sus investigaciones Meng et al (2019) y Zandiba-Siregar et al (2019.…”

Research on Runoff Simulations Using Deep-Learning Methods

“…At the same time, the theoretical research of producing and conflux of runoff gradually matures, and the model structure improves. A physical model has been developed and applied rapidly from lumped type to distributed type [9][10][11][12][13][14][15]. Although the distributed hydrological model based on complex physical mechanism can truly reflect the spatial variability of runoff and concentration process, the models have their applicable physical background, which limits the generality in all basins [16].…”