effects and consideration of storm movement in rainfall–runoff modelling at the basin scale
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2016
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Abstract
A number of studies have emphasized the effects of rainfall movement on
runoff simulation; nevertheless, due to the lack of rain gauges inside
sub-basins, a method using a hyetograph of the nearest gauges to a sub-basin
is usually employed. This study investigated the effects of neglecting
rainfall movement on overland simulation results in even a middle-sized
basin. Simulations were carried out under two conditions: (1) stationary
conditions where the nearest gauge hyetograph was used and rainfall movement
was ignored, which is quite common in the case of a lack of data, and (2) moving
conditions where a shifted hyetograph based on hyetograph timing recorded in
the basin was used. The simulation results were compared with the measured
discharge at the outlets. The results revealed that using the shifted
hyetograph, which could consider the rainfall movement over sub-basins,
decreased the mismatches between the simulated and observed hydrograph. In
some of the cases, the shifted hyetograph reduced the relative difference
more than 20 %. The study provided a useful method to cope with rainfall
movement in runoff modelling of sparsely gauged large watersheds.
| Reference Key |
sigaroodi2016hydrologyeffects
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|---|---|
| Authors | ;S. K. Sigaroodi;Q. Chen |
| Journal | materials research bulletin |
| Year | 2016 |
| DOI |
10.5194/hess-20-5063-2016
|
| URL | |
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