Hydrodynamic analysis of storm movement effects on runoff hydrographs and loop-rating curves of a V-shaped watershed

Title
Hydrodynamic analysis of storm movement effects on runoff hydrographs and loop-rating curves of a V-shaped watershed
Author(s)
서용원김대홍[김대홍]
Keywords
SURFACE RUNOFF; MOVING RAINSTORMS; OVERLAND-FLOW; NUMERICAL-MODEL; EQUATIONS; BATHYMETRY; SCHEMES
Issue Date
201310
Publisher
AMER GEOPHYSICAL UNION
Citation
WATER RESOURCES RESEARCH, v.49, no.10, pp.6613 - 6623
Abstract
The effects of storm movement on rainfall-runoff processes through a V-shaped watershed are investigated using a dynamic wave model based on shallow water equations. The governing equations are solved by a fourth-order accurate finite volume method to obtain accurate computational results. Once the numerical model is verified, a series of rainfall-runoff events on a V-shaped watershed are simulated. To investigate the contribution of each term in the depth-averaged momentum equation, a scale analysis, and quantitative assessment are conducted on the basis of the computational results. As a result, it is found that the speed and the direction of storm movement can play an important role in determining peak discharge and peak arrival time. In addition, the storm movement can generate loop in the stage-discharge relationship curve. Finally, it is revealed that the rating curve depends on the watershed characteristics rather than the rainfall conditions, at least in the idealized V-shaped watershed.
URI
http://hdl.handle.net/YU.REPOSITORY/28777http://dx.doi.org/10.1002/wrcr.20535
ISSN
0043-1397
Appears in Collections:
공과대학 > 건설시스템공학과 > Articles
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