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An Arcgis Tool for Creating Populations of Watersheds

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Abstract:For the Landscape Investigations for Pesticides Study in the Midwest, the goal is to sample a representative subset of watersheds selected statistically from a target population of watersheds within the glaciated corn belt. This area stretches from Ohio to Iowa and includes parts of Michigan, Wisconsin and Minnesota. Although readily available watershed delineations such as the National Resource Conservation Service's 12- and 14-digit hydrologic unit code (HUC) delineations provide consistently-determined watersheds within states, the level of detail varies among the states in the Midwest. To provide a consistently determined target population of watersheds across the entire area, we developed ArcGISTM arc macro language (AML) computer code that allows many options for generating watersheds. After examining the characteristics of watersheds derived from the different options, we generated watersheds associated with third order streams for the forty-two 4-digit HUCs comprising the study area. The approach involved using National Elevation Dataset (NED) data with partial burn-in of streams from the National Hydrographic Data set, and no walls. Details of this approach and the resulting watersheds will be described.
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Citation:Chaloud, D. J., D. W. Ebert, T. G. Wade, and A. M. Pitchford. An Arcgis Tool for Creating Populations of Watersheds. Presented at American Water Resources Association, 2004 Spring Specialty Conference Geographic Information Systems (GIS) and Water Resources lll, Nashville, TN, May 17-19, 2004.
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Contact: Chris Siebert - (702) 798-2234 or siebert.christopher@epa.gov
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Division: Environmental Sciences Division
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Branch: Landscape Ecology Branch
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Product Type: Abstrct/Oral
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Presented: 05/17/2004
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Related Entries:
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Bullet Item Landscape Indicators for Stream Vulnerability to Pesticides and Toxic Substances
spacer Relationship Reason:   A Project of the Product
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Last Updated on Monday, October 22, 2007
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