USGS Washington Water Science Center
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Frans, L.M., 2006, Pesticides in agricultural irrigation-return flow in the Columbia Basin Project, 2002-04: Presentation by the U.S. Geological Survey at the Columbia River Toxics Reduction Strategy Meeting, Richland, Washington, September 21, 2006, 9 p. (PDF, 600 KB)
Jones, J.L., and Roberts, L.M., 1998, Shallow ground-water quality beneath row crops and orchards in the Columbia Basin Irrigation Project area, Washington: U.S. Geological Survey Water-Resources Investigations Report 97-4238, 29 p.
Karlinger, M.R., and Hansen, A.J., Jr., 1983, An engineering economic analysis of artificial recharge in a conjunctive irrigation plan in the Columbia Basin Project, Washington: U.S. Geological Survey Water-Resources Investigations 81-67, 28 p.
Wagner, R.J., Frans, L.M., and Huffman, R.L., 2006, Occurrence, distribution, and transport of pesticides in agricultural irrigation return flow from four drainage basins in the Columbia Basin Project, Washington, 2002-2004, and comparison with historical data: U.S. Geological Survey Scientific Investigations Report 2006-5005, 54 p