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Nitrogen Dynamics at a Manured Grass Field Overlying the Sumas-Blaine Aquifer in Whatcom County

Publication number Date Published
14-03-001March 2014
VIEW NOW: Nitrogen Dynamics at a Manured Grass Field Overlying the Sumas-Blaine Aquifer in Whatcom County (Number of pages: 150) (Publication Size: 18585KB)

Win Zip format (Publication Size: 147KB)
Note: Tables J.2 and J.3 in Appendix J

Appendices B through T
(110 pages) (7MB)

Response to Comments
(91 pages) (3MB)

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Author(s) Carey, B. (Ecology) and J. Harrison (WSU)
Description The Department of Ecology, in cooperation with Washington State University, conducted a 4-1/2-year monitoring study at a manured grass field overlying the Sumas-Blaine Aquifer in northwest Washington. The purpose of the study was to evaluate nitrogen dynamics at a manured field relative to documented high nitrate concentrations across the aquifer.

The amount and timing of manure application were the overriding factors that affected groundwater nitrate concentrations in shallow monitoring wells in the study field.

Nitrogen mass balance analysis and post-harvest soil nitrate results were not reliable predictors of nitrate concentrations in groundwater. Direct monitoring of water quality at the water table was the only accurate and reliable method for tracking effects of manure management on groundwater nitrate.

Appendices B through T are linked under View Now above. The Response to Comments is also linked above.
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Keywords Sumas-Blaine, HUC number, nitrogen, manure, groundwater, aquifer
WEB PAGE Sumas-Blaine surficial aquifer long-term ambient groundwater monitoring
WATERSHED Water Resource Inventory Area 01 Nooksack
DATA Environmental Information Management (EIM) #bcar0003


POSTER: Evaluation of field N budgets and soil nitrate as indicators of N leaching to groundwater in a Pacific Northwest U.S. dairy grass field

Focus on Groundwater Quality: Study evaluates nitrogen at a manured grass field

Sumas-Blaine Aquifer Nitrate Contamination Summary

Quality Assurance Project Plan: Groundwater, Soil, and Crop Nitrogen at a Field Where Dairy Waste is Used as Fertilizer in Whatcom County.