An evolution of the urban waterlogging flood routing was studied in this paper based on the method of hexagonal grid modeling. Using the method of discrete grid, established an urban geometry model on account of the regular multi-scale discrete grid. With the fusion of 3D topographic survey data and 2D building vector data, formed a regular network model of surface. This model took multi special block into account, such as urban terrain and buildings. On this basis, a method of reverse flow deduction was proposed, which was an inverse computation from the state of flood to the evolution process. That is, based on the water depth of flood, made use of the connectivity with the outfall to calculate the range of water logging, and then implemented the urban waterlogging flood simulation deduction. The test indicated that, this method can implement the evolution of urban waterlogging scenario deduction effectively. And the correlational research could provide scientific basis for urban disaster prevention and emergency decision-making.
LAI Guangling
,
TONG Xiaochong
,
ZHANG Yong
,
DING Lu
,
LI Kai
,
FAN Shuaibo
. Research on the Method of Urban Waterlogging Flood Routing Based on Hexagonal Grid[J]. Acta Geodaetica et Cartographica Sinica, 2016
, 45(S1)
: 144
-151
.
DOI: 10.11947/j.AGCS.2016.F018
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