1a.Objectives (from AD-416):
Quantify edge-of-field phosphorus losses following changes in management.
1b.Approach (from AD-416):
Using automated samplers and control volumes we will instrument and measure hydrology and water quality from edge-of-field sites in Ohio. The sites will be representative of crop production practices throughout the state. The data will be used to quantify the hydrology and water quality impacts of different management practices and to evaluate (validate) the current Ohio Phosphorus Index.
In addition to edge-of-field (EOF) sites already identified and instrumented to support the Mississippi River Basin Initiative (MRBI), 16 fields (8 pair) have been identified and are being instrumented in the Western Lake Erie Basin (WLEB). The field sites include both surface and subsurface (tile) locations. Data are currently being collected from 16 MRBI fields and 8 WLEB fields. Hydrology and water quality that includes nitrogen and phosphorus are being collected at each location.
The work and progress associated with this project supports objective 1 of the parent project, specifically sub-objective 1a: Quantify the influence of conservation practices on surface discharge and water chemistry in the agricultural landscape and sub-objective 1b: Conduct field and watershed-scale studies of hydrology, nutrient, and agrichemical contributions originating from subsurface drainage.