Cooperative Water Program
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Water quality improvements and best-management practices in agricultural watersheds in Wisconsin –USGS, in cooperation with the Wisconsin Department of Natural Resources, assessed the effectiveness of watershed-management practices, including fencing, streambank protection, barnyard-runoff control, and other practices-for controlling nonpoint-source contamination for the largely agricultural and wooded Eagle Creek and Joos Valley Creek Watersheds. Water quality improvements are attributed to the implemented management practices and to a reduction in the number of cattle in the watersheds.
Sediment and nutrients in agricultural runoff in southern Wisconsin –A cooperative study between USGS, the University of Wisconsin (UW)-Madison Discovery Farms Program, and the UW-Platteville Pioneer Farm program was developed to identify typical ranges and magnitudes, temporal distributions, and principal factors affecting concentrations and yields of sediment, nutrients, and other selected constituents in runoff from agricultural fields. Analysis of runoff, concentration, and yield data on annual, monthly, and seasonal time scales, when combined with precipitation, soil moisture, soil temperature, and on-farm field-activity information, revealed conditions in which runoff was most likely. The analysis also revealed the effects that field conditions and the timing of field-management activities-most notably, manure applications and tillage--had on the quantity and quality of surface runoff from agricultural fields.
Applications of treated municipal wastewater and other sources of nitrate in groundwater beneath Leon and Wakulla Counties, Florida –USGS, in cooperation with the City of Tallahassee, studied the sources and transport of nitrate-nitrogen in groundwater associated with agricultural sprayfields (related to disposal of treated municipal wastewater), along with other sources of nitrate (including atmospheric deposition, onsite sewage disposal systems, disposal of biosolids by land spreading, creeks discharging into sinks, domestic fertilizer application, and livestock wastes).(Full report)