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Description: The watertable management model,DRAINMOD, was validated with field data measured in a subsurface-drained field in Atlantic Canada. The 5.4 ha alfalfa field was monitored for three summer months in 1990 andforfive months in 1991 forthemidspan watertable heights and drain outflows. Three drain spacings, i.e.3,6, and 12 m were used. The average mean of the differences, the average absolute deviations, die standard error, the standard devia tion, and the correlation coefficient between the average measured midspan watertable heights and the simulated values ranged from -104.97to 74.8 mm,96.9 to 210.5 mm, 135.4to 271.7 mm, 134.3to 251.9 mm, and 0.45 to 0.87, respectively, for the three drain spac ings. For drain outflows, the corresponding values were -0.146 to -0.62mm/d, 0.6 to 1.42mm/d, 1.37to 3.55mm/d,1.24to3.57mm/d, and 0.47 to0.74, respectively. These values arecomparable tovalues reported by others in similar model validation studies. Noattempts were made to calibrate the model. Therefore, it can be concluded that DRAINMOD can be used for designing or evaluating subsurface drainage systems in Atlantic Canada.

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Citation: M.B. Shukla, S.O. Prasher, A. Madani and G.P. Gupta 1994. FIELD VALIDATION OF DRAINMOD IN ATLANTIC CANADA. Canadian Agricultural Engineering 36(4):205-213.
Volume: 36
Issue: 3
Pages -
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Date: 1994
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Type: Text.Article
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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