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Upper Washita River Experimental Watersheds: Nutrient Water Quality Data

posted on 2024-02-13, 13:57 authored by Patrick Starks

Climate variability, changing land use and management, and dynamic policy environments are the main reasons why long-term water quality data sets are needed to understand and predict possible water quality outcomes to alternative future scenarios. Such data sets were acquired by the USDA-ARS in three watersheds in Oklahoma: the Southern Great Plains Research Watershed (SGPRW), the Little Washita River Experimental Watershed (LWREW), and the Fort Cobb Reservoir Experimental Watershed (FCREW). Water quality data collection in the SGPRW began in the 1960s and continued through 1978, while that in the LWREW covered the 1960s to 1990 period. Data collection began in the FCREW in 2004 and continues through the present. The data were collected from streams, unit source watersheds, groundwater wells, and reservoirs. It should be noted that various forms of P—reactive P, total P, soluble P, water-soluble P, particulate P, bioavailable P, total water-soluble P—were measured and are described here as given in the original data sets. No effort was made to determine the similarity of these variables.

Resources in this dataset:




Data contact name

Starks, Patrick

Data contact email


Journal of Environmental Quality

Intended use

These data sets are expected to improve modeling and assessments of conservation practices in relation to climate variability, land use changes, and other environmental factors and may be useful in developing strategies to mitigate these environmental impacts.

Use limitations

Discharge or runoff data for a given unit source watershed, reservoir, or stream gauge are not included in the water quality files. While the water quality data described for a given site are generally complete for a given period of record, not all sites were monitored continuously and were not necessarily analyzed for the same water quality parameters.

Temporal Extent Start Date



  • Not specified

Geographic Coverage


ISO Topic Category

  • environment
  • farming

Ag Data Commons Group

  • Southern Plains
  • Long-Term Agroecosystem Research

National Agricultural Library Thesaurus terms

climate; issues and policy; water quality; data collection; Agricultural Research Service; watersheds; Oklahoma; Great Plains region; rivers; streams; groundwater; wells; phosphorus; models; conservation practices; land use change; environmental factors; environmental impact

OMB Bureau Code

  • 005:18 - Agricultural Research Service

OMB Program Code

  • 005:040 - National Research

Primary article PubAg Handle

Pending citation

  • No

Public Access Level

  • Public

Preferred dataset citation

Starks, Patrick (2020). Upper Washita River Experimental Watersheds: Nutrient Water Quality Data. Journal of Environmental Quality.