Communications Project

Document Type:Major Paper
Name:Kenneth Espiritu
Title:Development of a Computerized Version of the Universal Soil Loss Equation and the USGS Pollutant Loading Functions
Degree:Master of Engineering in Civil Engineering
Department:Civil Engineering
Committee Chair: David F. Kibler
Committee\ Members:
Keywords:erosion prediction models, sediment yield models, pollutant load models
Date of defense:June 11, 1997
Availability:Release the entire work for Virginia Tech access only.
After one year release worldwide only with written permission of the student and the advisory committee chair.


A computerized program of soil loss and pollutant loading equations was developed in a Windows PC environment. The program implements the Universal Soil Loss Equation (USLE), the Modified Universal Soil Loss Equation (MUSLE), Roehl’s sediment delivery ratio equation, and a sediment delivery ratio equation based on both the USLE and the MUSLE. Also implemented into the program were ten pollutant loading equations based on the USGS Nationwide Regression Equations (NRE) for predicting water quality in urban runoff. The programs developed here will become a part of the Virginia Tech/Penn State Urban Hydrology Model (VT-PSUHM).

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