Impact of imperfect potential evapotranspiration knowledge on the efficiency and parameters of watershed models

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• 作者：André ; assian ; Vazken ; Perrin ; Charles ; Michel ; Claude
• 关键词：Rainfall&ndash ; runoff modeling ; Sensitivity analysis ; Potential evapotranspiration ; Parameter uncertainty ; Parsimony
• 刊名：Journal of Hydrology
• 出版年：2004
• 期刊代码：68_00221694
• 类别：abs
• 出版时间：January 30, 2004
• 卷：286
• 期：1-4
• 页码：19-35
• 文件大小：543 K

摘要

This paper attempts to assess the impact of improved estimates of areal potential evapotranspiration (PE) on the results of two rainfall–runoff models. A network of 42 PE stations was used for a sample of 62 watersheds and two watershed models of different complexity (the four-parameter GR4J model and an eight-parameter modified version of TOPMODEL), to test how sensitive rainfall–runoff models were to watershed PE estimated with the Penman equation.