An Infiltration Based Runoff Model For Use With a Design Store

by W. J. Rawls, USDA, Agricultural Research Service, Hydrology Lab, Beltsville, MD, USA,
D. L. Brakensiek, USDA, Agricultural Research Service, Hydrology Lab, Beltsville, MD, USA,



Document Type: Proceeding Paper

Part of: Hydraulics and Hydrology in the Small Computer Age

Abstract:

The feasibility of using an infiltration approach for routine runoff prediction has become a reality with the development of approximate infiltration models based on physical principles and infiltration parameter inputs based on readily available soil properties. This paper presents a design storm infiltration-based runoff procedure for use at ungaged locations. The procedure which utilizes the Green-Ampt infiltration equation for predicting the distribution of rainfall excess for design storms is presented. Basic input is readily available soil texture and porosity data.

Subject Headings: Infiltration | Runoff | Storms | Soil analysis | Permeability (soil) | Soil water | Soil properties

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