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Groundwater Recharge During Spring Thaw in the Prairie Pothole Region via Large, Unfrozen Preferential Pathways
Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.orgCitation: Pp. 49-52 in Preferential Flow, Water Movement and Chemical Transport in the Environment, Proc. 2nd Int. Symp. (3-5 January 2001, Honolulu, Hawaii, USA), eds. D. D. Bosch and K. W. King. St. Joseph, Michigan: ASAE 701P0006.(doi:10.13031/2013.2131)
Authors: B.S. Sharratt
Keywords: Macropore, Snowmelt, Infiltration
Snowmelt is an important source for replenishing groundwater in the Prairie Pothole Region of North America. Snowmelt collects in landscape depressions (forming temporary ponds) as a result of frozen soil impeding infiltration. These ponds aid in replenishing groundwater during spring thaw. Little is known, however, about the dynamic changes in groundwater and the associated physical state of the soil at the time of recharge. In February 2000, the water table within a 2-ha landscape depression rose by 1 m within 24 h after a pond (surface area of 2000 m