Improved Swat Model and Application in Simulation of Snowmelt Runoff

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Abstract:

The improved model for double layer snowpack melting was put forward to overcome the disadvantages of the DG (Degree-Day) model which had simple principle and neglected the relevant factors which could be important to the simulation of snowmelt runoff. The surface snowpack model, improved top layer snowpack model and model parameters calculation were studied. The structure and calculation method were put forward to improve double layer snowpack runoff model. Finally, taking the Lancangjiang River as an example, the snowmelt runoff was calculated by the improved SWAT model. Through comparison, it revealed that between two models that the simulation results of the improved double layer snow melting model was obviously better than that of the DG model in evapo-transpiration loss, the distinguish among cover layer, snowfall, rainfall and snowpack water equivalent calculation, and melting snowpack refrozen as well as adaption condition.

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Periodical:

Advanced Materials Research (Volumes 550-553)

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2561-2564

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Online since:

July 2012

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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DOI: 10.1002/hyp.5614

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