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Water Quality and Quantity Inputs for the Urban Creeks Future Needs AssessmentBy Michael E. Barrett, Ann M. Quenzer, and David R. Maidment ABSTRACT This report presents an analysis of more than 20 years of stormwater runoff data collected in the City of Austin. The goal of this effort is to identify the relationship between land use, impervious cover, and the amount and quality of stormwater runoff. Analysis of data from single land use watersheds indicates that impervious cover can successfully be used to estimate concentrations of various constituents in runoff. The amount of runoff produced annually for various levels of impervious cover for development on and off the Edwards recharge zone indicates that a single relationship adequately represents the runoff from all areas. The concentrations of constituents in the major creeks in the City during storms were analyzed to determine whether significant seasonal variations could be identified. The results indicate little relationship between season and water quality. Finally, dry weather flow volumes were used to derive a relationship between the average impervious cover in the watershed and the amount of baseflow produced. The highlighted links that follow are connected to Adobe pdf files of the corresponding material. To view them you must have the Adobe Acrobat Reader 3.0. View the Whole Report...(1.4Mb)
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