Project Number: 1902-13000-012-31
Start Date: Sep 30, 2013
End Date: Sep 30, 2015
The project will be led by a postdoctoral scholar, with close supervision by Penn State faculty members and USDA-Agricultural Research Service scientists. In year one, the postdoctoral scholar will apply pedogenic models in each of the four project watersheds to map soils with restrictive layers that are prone to seasonal saturation and surface runoff generation. The restrictive layer maps will be used in conjunction with data from past hydrologic studies and ongoing monitoring efforts to develop empirical models linking rainfall-runoff and infiltration occurrence to new, high-resolution weather forecast variables for each of the four watersheds. These models will support the development of the Fertilizer Forecaster, a web-based tool to guide decisions by farmers on when and where to apply fertilizers and manures over 24, 48, and 72 hour periods. In year two, the postdoctoral scholar will apply the Soil and Water Assessment Tool (SWAT) model to the four project watersheds in order to simulate phosphorus losses under alternate applications of the phosphorus site assessment index. This work will support efforts by Penn State and USDA-ARS to validate and refine site assessment tools for phosphorus in the upper Chesapeake Bay watershed.