Submitted to: National Sedimentaton Laboratory (NSL)- 50 Years of Soil & Water Research in a Changing Agricultural Environment
Publication Type: Abstract Only
Publication Acceptance Date: March 1, 2008
Publication Date: August 3, 2008
Citation: Bosch, D.D., Feyereisen, G.W., Lowrance, R.R., Strickland, T.C., Cho, J. 2008. Conservation Practices Impacts Within The South Georgia Little River Experimental Watershed. National Sedimentaton Laboratory (NSL)- 50 Years of Soil & Water Research in a Changing Agricultural Environment. Technical Abstract: Water quality data collected from the Little River Watershed from 1974 to 2003 were related to changes in precipitation and land management within the watershed. Prior research indicated there are few strong temporal trends in the streamflow water quality data over time. There was a statistically significant downward trend for mean annual total phosphorus concentration in six Little River subwatersheds and an upward trend for chloride in three subwatersheds. The decrease in total phosphorus concentration occurred primarily in winter months which typically have higher rainfall and groundwater flow. Climatic variability and dense riparian vegetation appear to confound clear relationships between land-use and streamflow water quality within the watershed. Seasonal rainfall patterns and groundwater flow were used to relate and decouple their impact on streamflow water quality from the impact of land-use.