Investigation of Runoff from a Subsurface Drained Field

by S. Hackwell, McGill Univ, Canada,
S. O. Prasher, McGill Univ, Canada,



Document Type: Proceeding Paper

Part of: Planning Now for Irrigation and Drainage in the 21st Century

Abstract: This paper examines the relationship among rainfall, water table level and runoff hydrographs for subsurface-drained farmlands. It was found that peak flows were greatly influenced by the location of the water table below the soil surface prior to the beginning of a rainfall event. The times to peak were influenced by the rainfall intensity and duration. In general, longer times to peak were observed for low intensity rain storms. The time from the start of rainfall to the start of runoff depended upon the position of the water table and the rainfall intensity.

Subject Headings: Rain water | Rainfall intensity | Rainfall-runoff relationships | Water table | Runoff | Subsurface drainage | Water flow | Soil water

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