The operation and simulation accuracy of hydrological model mainly depends on the quality of input parameters. The precipitation parameters of SWAT model input were acquired through different approaches. To evaluate the data inputs, this article compared the accuracy of model simulations. It was found in SWAT model that the choice of precipitation site is generally fixed during one simulation, and the model will use the weather generator to fill in gaps in measured records. The weather generator functioned inaccurately on extreme weather conditions, which leads to precipitation input error. The SWAT model simulation was suitable for the years with less variable rate of precipitation and operated imprecisely in heavy rains events. The changing range of precipitation should be evaluated before the simulation. On regions of lacking precipitation observations the spatial interpolation method can serve as a good tool to produce data needed by SWAT model. The using of GIS tools will promote the development of hydrological model.
NING Ji-cai, LIU Gao-huan, YE Yu, LIU Qing-sheng, XIE Chuan-jie
. Study on Precipitation Parameters Input of SWAT Model[J]. JOURNAL OF NATURAL RESOURCES, 2012
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: 866
-875
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DOI: 10.11849/zrzyxb.2012.05.015
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