Down-scale Inundation Simulations for Local Area of a Basine
Date Issued
2008
Date
2008
Author(s)
Chen, Yen-Hung
Abstract
The quick growing of remote sensing technology in recent years has obviously elevated the quality, in both resolution and precision respects, of topographic data. The accuracy and availability of the airborne scanning laser altimetry have been promoted and the applications are widening. The requirements of computation resources cause the difficulty for massive simulations by using the high quality digital terrain models (DTM). In most practical situations, the large area for computation is essential to having proper boundary conditions, nevertheless, the high accuracy might be needed only in limited parts of the domain. The local refinement method is a feasible solution to provide results comparable to a much higher resolution (uniformly refined) mesh with less computational expense. In this study, an efficient 2D inundation model, incorporating the QPESUMS radar precipitation and multi-scale computational method, will be established to provide accurate resolution results. The 0612 Storm event of 2005 in Bajhang River basin is adopted as the study case of the newly developing model. The accuracy and efficiency of proposed model are evaluated with different grid scale. The high performance of the multi-scale inundation model with high resolution grids in local area is obtained.
Subjects
Inundation model
multi-scale simulation
QPESUMS system
Type
thesis
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