Paper No. JAWRA-07-0146-P of the Journal of the American Water Resources Association (JAWRA). Discussions are open until six months from print publication.
Field Evaluation of DRAINMOD 5.1 Under a Cold Climate: Simulation of Daily Midspan Water Table Depths and Drain Outflows†
Article first published online: 20 APR 2009
© 2009 American Water Resources Association
JAWRA Journal of the American Water Resources Association
Volume 45, Issue 3, pages 779–792, June 2009
How to Cite
Dayyani, S., Madramootoo, C. A., Enright, P., Simard, G., Gullamudi, A., Prasher, S. O. and Madani, A. (2009), Field Evaluation of DRAINMOD 5.1 Under a Cold Climate: Simulation of Daily Midspan Water Table Depths and Drain Outflows. JAWRA Journal of the American Water Resources Association, 45: 779–792. doi: 10.1111/j.1752-1688.2009.00322.x
- Issue published online: 26 MAY 2009
- Article first published online: 20 APR 2009
- Received October 19, 2007; accepted December 2, 2008.
Vol. 46, Issue 4, 849, Article first published online: 11 JUN 2010
- DRAINMOD 5.1;
- subsurface drainage;
- simulation model;
- cold climate
Abstract: The hydrologic performance of DRAINMOD 5.1 was assessed for the southern Quebec region considering freezing/thawing conditions. A tile drained agricultural field in the Pike River watershed was instrumented to measure tile drainage volumes. The model was calibrated using water table depth and subsurface flow data over a two-year period, while another two-year dataset served to validate the model. DRAINMOD 5.1 accurately simulated the timing and magnitude of subsurface drainage events. The model also simulated the pattern of water table fluctuations with a good degree of accuracy. The R2 between the observed and simulated daily WTD for calibration was >0.78, and that for validation was 0.93. The corresponding coefficients of efficiency (E) were >0.74 and 0.31. The R2 and E values for calibration/validation of subsurface flow were 0.73/0.48 and 0.72/0.40, respectively. DRAINMOD simulated monthly subsurface flow quite accurately (E > 0.82 and R2 > 0.84). The model precisely simulated daily/monthly drain flow over the entire year, including the winter months. Thus DRAINMOD 5.1 performed well in simulating the hydrology of a cold region.