Scientific Investigations Report 2009–5030
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2009–5030
Effect of Agricultural Practices on Hydrology and Water Chemistry in a Small Irrigated Catchment, Yakima River Basin, Washington
National Water-Quality Assessment Program
By Kathleen A. McCarthy and Henry M. Johnson
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Figures
Figure 1. Location of the DR2 catchment and data-collection sites, Yakima River basin, Washington.
Figure 2. Data-collection dates in the DR2 catchment, Yakima River basin, Washington.
Figure 3. Estimated 2003 water balance for the DR2 catchment, Yakima River basin, Washington.
Figure 4. Discharge for the DR2 Catchment surface-water outflow (site W13), Yakima River basin, Washington.
Figure 5. Conceptualization of the hydrology of the DR2 catchment, Yakima River basin, Washington.
Figure 6. Water levels in well pairs in the DR2 catchment, Yakima River basin, Washingto.
Figure 7. Water levels and water temperatures in ground water in the DR2 catchment, Yakima River basin, Washington.
Figure 8. Ground-water head gradient and temperature at site W23, DR2 catchment, Yakima River basin, Washington
Figure 9. Estimated ground-water recharge dates in the DR2 catchment, Yakima River basin, Washington.
Figure 10. Abundance of deuterium and oxygen–18 in water samples from the DR2 catchment, Yakima River basin, Washington.
Figure 11. Abundances of oxygen-18 and nitrogen-15 in nitrate in water samples from the DR2 catchment, Yakima River basin, Washington.
Figure 12. Distribution of specific conductance of water samples from the DR2 catchment, Yakima River basin, Washington.
Figure 13. Distribution of concentrations of major solutes in water samples from the DR2 catchment, Yakima River basin, Washington.
Figure 14. Distribution of concentrations of nitrate and soluble reactive phosphorus in water samples from the DR2 catchment, Yakima River basin, Washington.
Figure 15. Vertical temperature profile measured in the streambed in the DR2 catchment, Yakima River basin, Washington, September 2004.
Figure 16. Concentrations of selected solutes and stream discharge at the DR2 catchment outflow (site W13), Yakima River basin, Washington.
Figure 17. Distribution of concentrations of selected solutes measured in the DR2 catchment outflow components, and concentrations calculated for hypothetical seasonal agricultural flow (SAF), Yakima River basin, Washington.
Tables
Table 1. Excess nitrogen gas (N2) measured in the DR2 catchment, Yakima River basin, Washington.
Table 2. Composition of surface flow-system components during the irrigation season in the DR2 catchment, Yakima River basin, Washington.
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Send questions or comments about this report to the author, K.A. McCarthy, (503) 251-3257.
For more information about USGS activities in Washington, visit the USGS Oregon Water Science Center home page.