In Indiana, there are extensive agricultural areas developed on glacial outwash deposited in floodways of major streams and on outwash fans and wind-blown sands. In such settings, groundwater is subject to degradation by nitrates derived from agricultural sources such as inorganic fertilizers, crop residues, applied manure, and manure from grazing cattle. However, denitrification may occur as groundwater migrates downward, so that shallow aquifers in such settings are candidates for remediation. A variety of experimental practices were employed in an attempt to reduce the leaching of nitrates into groundwater. Groundwater chemistry was monitored in test plots to determine if such practices resulted in measurable improvements in water quality. Following application of standard quantities of inorganic fertilizers, nitrate concentrations in the uppermost part of the water table naturally decline to values that are less than the Drinking Water Standard limits. The results of experimental practices such as reduction of fertilizer applications and use of nitrification inhibitors are also described.
Harper, D. , Hartke, E. J. 2009, Best management practices to remediate nitrate contamination in a major outwash aquifer in Jackson County, Indiana: Indiana Geological Survey Occasional Paper 70, 14 p., 6 fig.
You may also like:
Can't find what you're looking for? Feel free to contact us directly:
Publication Sales Office
Indiana Geological and Water Survey
611 North Walnut Grove
Bloomington, IN 47405-2208
IGS Return Policy
All sales are final. Materials may not be returned after they have been accepted by the customer. Any discrepencies in mail orders must be reported to IGWS within 10 days of receipt of order.
The Indiana Geological and Water Survey will refund the purchase price and sales tax of products if returned with the original sales receipt within 10 days of receipt of order. Refunds will be issued with the same method of payment as indicated on the original receipt except for cash purchases, which will be refunded by check. Items must be returned in the same condition as purchased. Refunds on digital products and services are not allowed, except for defective media such as CD-ROMs, flash drives, and so on. The customer is responsible for paying shipping costs to return items.