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United States Department of Agriculture

Agricultural Research Service

Title: Modeling Soil Freezing, Thawing and Frozen Soil Runoff

Authors
item Flerchinger, Gerald
item Seyfried, Mark

Submitted to: American Geophysical Union
Publication Type: Abstract Only
Publication Acceptance Date: November 1, 1995
Publication Date: N/A

Technical Abstract: Seasonally frozen soil plays play an important role in the hydrology in northern latitudes. In many areas, rain or snowmelt on seasonally frozen soil is the single leading cause of severe runoff events, but efforts to predict frozen soil runoff have had limited success. A field study was conducted at the Lower Sheep Creek Watershed within the Reynolds Creek Experimental Watershed to study processes associated with infiltration and runoff (and is described by Seyfried and Flerchinger in a companion study). The Simultaneous Heat and Water(SHAW)model was applied to data collected at the Lower Sheep Creek site to simulate the impacts of sparse vegetation on heat and water transfer associated with frozen soil infiltration and runoff. The SHAW model simulates a one-dimensional vertical profile extending form the plant canopy, snow, residue and soil into one simultaneous solution. Interrelated heat, water and solute fluxes are computed throughout the system and include detailed provisions of soil freezing and thawing. Daily or hourly predictions include evaporation, transpiration, soil frost depth, snow depth, runoff and soil profiles of temperature, water, ice and solutes. Simulation results compared well with soil temperature, unfrozen water content and runoff measured for areas with and without vegetation cover.

Last Modified: 9/10/2014
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