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30 Year Historical Trends in Coralville Reservoir Water Quality

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan

Citation:  Paper number  701P0904,  . (doi: 10.13031/2013.17428)
Authors:   Claudia O. Espinosa-Villegas1*, Dr. Craig L. Just2 Dr. Jerald L. Schnoor1

Iowas water resources are perhaps its single most valuable natural asset, yet the number of water bodies and river miles impaired by nutrients and siltation has increased in the last years. With agriculture as the leading industry in Iowa, yet a major contributor to water resources degradation, it is difficult to protect our water resources without negative economic and social impacts to farmers. In watersheds that are primarily agricultural, it has been estimated that over 80% of the total nitrogen added in to the watershed comes from commercial fertilizers use related to agriculture. Many times, the amounts of in-stream nutrients can be correlated to the land-use of the watershed.

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