Parameters for the Green-AMPT Loss-Rate Function for Select Texas Watersheds

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Karki, Amit

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Graduate School of Texas Tech University



Some portion of incoming rainfall gets intercepted by the vegetation cover and some portion gets infiltrated into the soil. The soil properties such as hydraulic conductivity and moisture content influence the rate of infiltration process. The remaining portion of the rainfall runs off into the watercourse and subsequently into a wash, creek or stream. This study includes the study of initial loss and infiltration loss parameters. The values for initial loss and infiltration parameters are obtained from an optimization process by the use historically recorded rainfall and runoff data. For this study rainfall-runoff data recorded for selected watersheds in Texas were used. These watersheds were located primarily in Dallas, Fort Worth, Austin, San Antonio and in rural areas of central to north-central Texas. The watersheds were located for the period of 1957 to 1987.

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