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Rainfall Simulation Methods to Investigate Hydrologic Impervious Surface Effects

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  032297,  2003 ASAE Annual Meeting . (doi: 10.13031/2013.14978) @2003
Authors:   Elizabeth Warnemuende, William Shuster, James Bonta, Douglas R. Smith
Keywords:   Urbanization, Impervious Surfaces, Urban Runoff, Rainfall Simulation

Urbanization of watersheds previously managed for agricultural uses results in hydrologic and water quality changes including increased flooding, erosion, and surface water degradation. Few studies have been conducted to quantify these effects under controlled conditions and standard rainfall simulation methodologies have not been established. In this project, the feasibility of rainfall simulation methods to evaluate hydrologic and erosional responses to various impervious treatments is examined. In addition, a modular segmented soil box design is developed in order to quantify the hydrologic, erosional, and water quality impacts of specific urban land use configurations, including the impacts of land uses of areas hydraulically connected to impervious areas. Hydrologic, nutrient, and pesticide data from runoff under rainfall simulation will be collected and analyzed. Impervious treatments will include both effective and non effective impervious elements comprising up to 40% of the total hydrologic area.

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