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Data Extent

Goodwater Creek Experimental Watershed Nutrient Water Quality Data

The data producers document the 20-yr-long research effort to study the transport of N and P to surface and groundwater in Goodwater Creek Experimental Watershed. They also document related efforts in nearby claypan watersheds and watersheds with contrasting soil and hydrologic conditions across the northern Missouri–southern Iowa region. Details of the analytical methods, instrumentation, method detection limits, and quality assurance program used to generate the data are described in the associated article along with a brief overview of significant findings. Nutrient concentrations in streams were in the range associated with nuisance algal growth and presumed loss of aquatic invertebrate diversity. Incorporation of fertilizers was shown to be the most effective practice for reducing nutrient transport in runoff. Despite the claypan soils, NO3− leaching was a major fate for fertilizer N, and significant contamination of the glacial till aquifer has occurred when long-term fertilizer and manure N inputs exceeded crop N requirements. A key finding of these studies was that field areas with the poorest crop growth were also the most vulnerable to nutrient as well as sediment and herbicide transport.

Release Date
Spatial / Geographical Coverage Area
POLYGON ((-92.566 40.617, -90.933 40.617, -90.933 38.672, -92.566 38.672))
Temporal Coverage
January 1, 1991 to January 1, 2010
Contact Name
Lerch, Robert
Contact Email
Public Access Level
Source ID
Harvested from Geodata Harvest
Harvest Source TitleGeodata Harvest
Harvest Source URIhttps://geodata:NAL2geodata@2017@geodata.nal.usda.gov/geonetwork/srv/eng/csw
Last Harvest PerformedTue, 04/10/2018 - 13:22

Metadata Source