Intense monsoon rains produce surface runoff from the cropped areas.Evacuation of this surface runoff from the area within a safe time is essentialto protect the crops from damage due to inundation, scalding, scorching,restricted root respiration and rise of ground water table upto the rootzone due to infiltration of rain water. On-farm surface drains (Morabba andChak drains) need to be provided to ensure the evacuation of the surfacerunoff from the area in time. The study was conducted to evaluate theperformance of on-farm drains on hydraulic principles with varying drainagecoefficients vis-à-vis the evacuation time and the capacity of the main drainagesystem.
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