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The Parallelization Effectiveness Analysis of K-DRUM Model  

Chung, Sung-Young (K-water 남강댐관리단)
Park, Jin-Hyeog (K-water 수자원연구소)
Hur, Young-Teck (K-water 물관리센터)
Jung, Kwan-Sue (충남대학교 토목공학과)
Publication Information
Journal of Korean Society for Geospatial Information Science / v.18, no.4, 2010 , pp. 21-30 More about this Journal
Abstract
In this paper, the parallel distributed rainfall runoff model(K-DRUM) using MPI(Message Passing Interface) technique was developed to solve the problem of calculation time as it is one of the demerits of the distributed model for performing physical and complicated numerical calculations for large scale watersheds. The K-DRUM model which is based on GIS can simulate temporal and spatial distribution of surface flow and sub-surface flow during flood period, and input parameters of ASCII format as pre-process can be extracted using ArcView. The comparison studies were performed with various domain divisions in Namgang Dam watershed in case of typoon 'Ewiniar' at 2006. The numerical simulation using the cluster system was performed to check a parallelization effectiveness increasing the domain divisions from 1 to 25. As a result, the computer memory size reduced and the calculation time was decreased with increase of divided domains. And also, the tool was suggested in order to decreasing the discharge error on each domain connections. The result shows that the calculation and communication times in each domain have to repeats three times at each time steps in order to minimization of discharge error.
Keywords
Parallelization; MPI; K-DRUM; Namgang Dam watershed; GIS(geographical information system);
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Times Cited By KSCI : 4  (Citation Analysis)
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