Respectively, Hydrologist, U.S. Geological Survey, 2280 Woodale Drive, Mounds View, Minnesota 55112; Research Hydrologist, U.S. Geological Survey, Denver Federal Center, MS 413, Lakewood, Colorado 80225; Hydrologist, U.S. Geological Survey, 406 Federal Bldg., 100 Centennial Mall North, Lincoln, Nebraska 68508; and Hydrologist, U.S. Geological Survey, 431 National Center, MS 431, Reston, Virginia 20192 (E-Mail/Delin: firstname.lastname@example.org).
EFFECTS OF TOPOGRAPHY AND SOIL PROPERTIES ON RECHARGE AT TWO SITES IN AN AGRICULTURAL FIELD1
Article first published online: 8 JUN 2007
JAWRA Journal of the American Water Resources Association
Volume 36, Issue 6, pages 1401–1416, December 2000
How to Cite
Delin, G. N., Healy, R. W., Landon, M. K. and Böhlke, J. K. (2000), EFFECTS OF TOPOGRAPHY AND SOIL PROPERTIES ON RECHARGE AT TWO SITES IN AN AGRICULTURAL FIELD. JAWRA Journal of the American Water Resources Association, 36: 1401–1416. doi: 10.1111/j.1752-1688.2000.tb05735.x
Paper No. 99095 of the Journal of the American Water Resources Association.Discussions are open until August 1, 2001.
- Issue published online: 8 JUN 2007
- Article first published online: 8 JUN 2007
- focused recharge;
- chlorofluorocarbon age dating;
- hydrograph analysis;
- ground water
ABSTRACT: Field experiments were conducted from 1992 to 1995 to estimate ground water recharge rates at two sites located within a 2.7-hectare agricultural field. The field lies in a sand plain setting in central Minnesota and is cropped continuously in field corn. The sites are located at a topographically high (upland) site and a topographically low (lowland) site in an effort to quantify the effects of depression focusing of recharge. Three site-specific methods were used to estimate recharge rates: well hydrograph analysis, chlorofluorocarbon age dating, and an unsaturated zone water balance. All three recharge methods indicated that recharge rates at the lowland site (annual average of all methods of 29 cm) exceeded those at the upland site (annual average of 18 cm). On an annual basis, estimates by the individual methods ranged from 12 to 44 percent of precipitation at the upland site and from 21 to 83 percent at the lowland site. The difference in recharge rates between the sites is primarily attributed to depression focusing of surface water runon at the lowland site. However, two other factors were also important: the presence of thin lamellae at the upland site, and coarser textured soils below a depth of 1.5 m at the lowland site.