Estimation of Seepage from Canal to Evaluate Its Role in the Process of Waterlogging in Heavy Soil

Studies were conducted in the minor canals, sub-minor canals and water courses at Barna Command to study drainage problem caused by excessive seepage from canal. Water-table fluctuations were studiedfor seven years. including annual rate of rise/fall in the water-table. The canals were designed initially considering the seepage value 0.81 cumec/Mm² of wetted area of canal. After ten years of canal operation. actual seepage rate was 1.5 times greater than the designed value, which has contributed to the drainage problem in about 8750 ha of land. The water-table rise responded positively to rainfall and canal operation schedule.