Community and Regional Planning Program


Date of this Version

Spring 2012


Szatko, Andrew. (2012). Assessing Impermeable Surface Area Impacts on Modeling: Implications for the Combined Sewer Overflow Long Term Control Plan in Omaha, Nebraska. Omaha.


This report was authored by Andrew Szatko in collaboraton with the City of Omaha's Department of Public Works and the Omaha CSO Program. This report is a professional project for the degree of Master of Community and Regional Planning at the University of Nebraska at Lincoln.


The report looks at assessing the accuracy of estimating impervious surface areas (ISAs) by zoning code, the method utilized by the City of Omaha, Nebraska. A 101 acre subcatchment had all ISAs manually digitized and compared the actual with the estimated value. The subcatchment was then modeled with 10 percent decreases of ISAs to establish the relationship with peak flow rates and total volume in the combined sewer service area. The results show a significant relationship between the two that may provide insights into a new approach to manage CSO events with the integration of green infrastructure.