Water 2014, 6(5), 1151-1171; doi:10.3390/w6051151
Article

A New Method for Urban Storm Flood Inundation Simulation with Fine CD-TIN Surface

Received: 11 February 2014; in revised form: 5 April 2014 / Accepted: 11 April 2014 / Published: 5 May 2014
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Urban storm inundation, which frequently has dramatic impacts on city safety and social life, is an emergent and difficult issue. Due to the complexity of urban surfaces and the variety of spatial modeling elements, the lack of detailed hydrological data and accurate urban surface models compromise the study and implementation of urban storm inundation simulations. This paper introduces a Constrained Delaunay Triangular Irregular Network (CD-TIN) to model fine urban surfaces (based on detailed ground sampling data) and subsequently employs a depression division method that refers to Fine Constrained Features (FCFs) to construct computational urban water depressions. Storm-runoff yield is placed through mass conservation to calculate the volume of rainfall, runoff and drainage. The water confluences between neighboring depressions are provided when the water level exceeds the outlet of a certain depression. Numerical solutions achieved through a dichotomy are introduced to obtain the water level. Therefore, the continuous inundation process can be divided into different time intervals to obtain a series of inundation scenarios. The main campus of Beijing Normal University (BNU) was used as a case study to simulate the “7.21” storm inundation event to validate the usability and suitability of the proposed methods. In comparing the simulation results with in-situ observations, the proposed method is accurate and effective, with significantly lower drainage data requirements being obtained. The proposed methods will also be useful for urban drainage design and city inundation emergency preparations.
Keywords: urban inundation; numerical simulation; CD-TIN; depression polygon; water runoff; risk mapping
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MDPI and ACS Style

Li, Z.; Wu, L.; Zhu, W.; Hou, M.; Yang, Y.; Zheng, J. A New Method for Urban Storm Flood Inundation Simulation with Fine CD-TIN Surface. Water 2014, 6, 1151-1171.

AMA Style

Li Z, Wu L, Zhu W, Hou M, Yang Y, Zheng J. A New Method for Urban Storm Flood Inundation Simulation with Fine CD-TIN Surface. Water. 2014; 6(5):1151-1171.

Chicago/Turabian Style

Li, Zhifeng; Wu, Lixin; Zhu, Wei; Hou, Miaole; Yang, Yizhou; Zheng, Jianchun. 2014. "A New Method for Urban Storm Flood Inundation Simulation with Fine CD-TIN Surface." Water 6, no. 5: 1151-1171.

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