Watersheds: Walnut Creek and Squaw Creek Watersheds

The Walnut (52.2 km2) and Squaw (47.4 km2) creek watersheds are two adjacent watersheds with similar basin characteristics located in the southern Iowa Drift Plain, an area characterized as steeply rolling hills and well developed drainage. These watersheds were selected for a paired watershed approach to study nonpoint source pollution reduction strategies by the Iowa Department of Natural Resources.

Relevant Projects

  • 2009-10: USEPA. U.S. Environmental Protection Agency. A Market Feasibility Assessment for a Reverse Auction in the Walnut Creek Watershed. Investigators: C.L. Kling, P.W. Gassman, M. Jha, K.E. Schilling, C.F. Wolter, and S. Rabotyagov. Amount: $200,000.
  • 2004-06: USDA/CSREES. U.S. Department of Agriculture/Cooperative State Research, Education, and Extension Services (now AFRI). Water Quality and Economic Effects of Multiple Conservation Practices in Three Midwest Watersheds. Investigators: C.L. Kling, M.M. Al-Kaisi, P.W. Gassman, M.J. Helmers, T.M. Isenhart, K.E. Schilling, and W.W. Simpkins. Amount: $645,600.

Journal Publications

  • Rabotyagov, S., M. Jha, and T. Campbell. 2009. Resilient optimal solutions for nonpoint source pollution reduction at watershed scale. Canadian Journal of Agricultural Economics (revised, January 2010)
  • Rabotyagov, S., M. Jha, and T. Campbell. 2010 (in press) Impact of crop rotations on optimal selection of conservation practices for water quality protection. Journal of Soil and Water Conservation.
  • Jha, M., K.E. Schilling, P.W. Gassman, and C.F. Wolter. 2010 (in press) Targeting land cover change for nitrate load reductions in an agricultural watershed. Journal of Soil and Water Conservation.
  • Schilling, K.E., M.D. Tomer, P.W. Gassman, C.L. Kling, T.M. Isenhart, T.B. Moorman, W.W. Simpkins, and C.F. Wolter. A tale of three watersheds: Nonpoint source pollution and conservation practices across Iowa. Choices: Food, Farm, and Resource Issues 22(2):87-95.