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Iowa CREP Site Identification with GIS

Utilize GIS for Iowa Conservation Reserve Enhancement Program (CREP) site identification. Conduct county-wide searches, terrain analysis models, and landowner inquiries to locate suitable sites. Ensure wetland criteria and buffer ratios are met. Use DEMs, aerial photography, and other coverages for detailed analysis.

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Iowa CREP Site Identification with GIS

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  1. Counties Eligible for Iowa Conservation Reserve Enhancement Program

  2. Site Identification • Geographic Information Systems (GIS) • Section by section county-wide search • Terrain analysis models • Landowner Inquiries • CREP Field Specialists • Local SWCD or NRCS staff

  3. Drainage area > 500 acres • Wetland should be 0.5% to 2% of watershed • drainage area • To maintain wetland vegetation, no more than • 25% of the wetland should be >3 feet in depth • “Shall not damage the value of property in any • public or private drainage system without the • property owner’s consent.” CREP Site Criteria • Buffer : Wetland ratio not to exceed 4:1

  4. GIS Coverages Used • Digital Elevation Models (DEMs) • Aerial Photography • Drainage Districts & Tile Drainage • Common Land Unit (CLU) • Hydrology • Soils • Animal Feeding Operations • Threatened & Endangered Species • Airports • Major Pipelines • Major Powerlines

  5. Iowa Conservation Reserve Enhancement Program Drainage District Boundary Hydric Soils Subsurface Tile Drain CREP Wetland

  6. Tile Outlet Potential Site Location Identify Potential Site

  7. Delineate Stream Network

  8. Delineate Watershed

  9. Potential Site Location Create One-Foot Contours Using Digital Elevation Models

  10. Deep Water Wetland Buffer Delineate Wetland Area Using Contours

  11. Negotiate Easement Boundary

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