Calculation and visualization of flood inundation based on a topographic triangle network

Zhang, Shanghong; Wang, Taiwei; Zhao, Bohua

doi:10.1016/j.jhydrol.2013.11.060

Cited by 38 publications

(14 citation statements)

References 22 publications

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“…Chen et al (2009) developed a flooding model in an urban environment, considering the cumulative surface runoff and flooding propagation based on a geographic information system (GIS) platform [10]. proposed the flood connected domain calculation (FCDC) method to estimate riverine flood inundation [20,21]. They showed that the FCDC method can accurately simulate the flooding inundation processes associated with river flooding and dike breach.…”

Section: Introductionmentioning

confidence: 99%

A Simple GIS-Based Model for Urban Rainstorm Inundation Simulation

et al. 2019

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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.

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Section: Introductionmentioning

confidence: 99%

A Simple GIS-Based Model for Urban Rainstorm Inundation Simulation

et al. 2019

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“…Seoul has the design criteria for drainage networks to deal with the rainfall amount of a 30 year-return period. The heavy rainfall in 2011 at the Gangnam area was equivalent to the rainfall-amount of a 50 year-return period, which is slightly greater than the design standards resulting in flooding over more than four square kilometers of the city's heart near the Gangnam subway station [8]. Figure 5a presents Seocho4, which is one of the catchments around the Gangnam subway station that was flooded in both 2010 and 2011.…”

Section: Flood In 2010 and 2011 In A Test Catchment Seocho4mentioning

confidence: 99%

“…With urbanization and climate change, many cities face increasing flooding risks playing a significant role in people's lives and the economy. Although there have been advances in the study of urban flood [3][4][5][6][7][8], most efforts have been concentrated on improving the accuracy of flood modeling in urban areas with complex geometry using cutting edge numerical methods and observations. Drainage networks are essential compartments in an urban infrastructure system for the most efficient collection and prompt drainage of flood water.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Urban Drainage Networks Using Gibbs’ Model: A Case Study in Seoul, South Korea

Seo

Hwang

Noh

2015

Water

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Drainage networks are essential compartments in an urban infrastructure system for the efficient collection and prompt drainage of flood water. In addition to the advances in numerical techniques on urban flood simulation, the topological characteristics of urban drainage networks and their impacts on flooding have not been investigated thoroughly despite their importance. This study evaluated the urban drainage networks in Seoul, South Korea, in terms of the network configuration and its implication for peak flows and flood mitigation. Gibbs' model was used to analyze the network configuration of 31 urban catchments with various slope ranges. The results showed that urban drainage networks can be less efficient than river in nature in terms of the drainage time, which is counter-intuitive. On the other hand, the analysis showed that efficient networks have risks of flood concentration and, hence, increase potential flood risks. This study showed that efficient networks tend to have higher peak flows at the outlet and vice versa. Therefore, an alternative drainage network layout, which is less efficient and more sinuous, was introduced and it resulted in reduced peak flows and flooding. This result shows managing a proper drainage network layout can contribute to flood mitigation in urban catchments. OPEN ACCESSWater 2015, 7 4130

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“…The stored water is utilized for a variety of purposes such as irrigation, hydropower generation, and drinking . Some dams are constructed for flood control so that inundation of its downstream area is mitigated . In any case, installation of a dam into a river significantly affects its downstream environment and, possibly, even upstream environment due to artificial control of the flow and physically blocking the waterway .…”

Section: Introductionmentioning

confidence: 99%

Robust stochastic control modeling of dam discharge to suppress overgrowth of downstream harmful algae

Yoshioka

Yaegashi

2017

Appl Stoch Models Bus & Ind

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The mathematical concept of multiplier robust control is applied to a dam operation problem, which is an urgent issue on river water environment, as a new industrial application of stochastic optimal control. The goal of the problem is to find a fit-for-purpose and environmentally sound operation policy of the flow discharge from a dam so that overgrowth of the harmful algae Cladophora glomerata Kützing in its downstream river is effectively suppressed. A minimal stochastic differential equation for the algae growth dynamics with uncertain growth rate is first presented. The performance index to be maximized by the operator of the dam while minimized by nature is formulated within the framework of differential games. The dynamic programming principle leads to a Hamilton-Jacobi-Bellman-Isaacs equation whose solution determines the worst-case optimal operation policy of the dam, ie, the policy that the operator wants to find. Application of the model to overgrowth suppression of Cladophora glomerata Kützing just downstream of a dam in a Japanese river is then carried out. Values of the model parameters are identified with which the model successfully reproduces the observed population dynamics. A series of numerical experiments are performed to find the most effective operation policy of the dam based on a relaxation of the current policy.

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Calculation and visualization of flood inundation based on a topographic triangle network

Cited by 38 publications

References 22 publications

A Simple GIS-Based Model for Urban Rainstorm Inundation Simulation

A Simple GIS-Based Model for Urban Rainstorm Inundation Simulation

Analysis of Urban Drainage Networks Using Gibbs’ Model: A Case Study in Seoul, South Korea

Robust stochastic control modeling of dam discharge to suppress overgrowth of downstream harmful algae

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