Soil Conservation Research, Demonstration and Training Centre, Chatra, Nepal
An automatic device for maintaining the constant head of water for infiltration studies was developed and this worked satisfactorily under different soil and site conditions. An air inlet tube (7 mm in diameter) adjusted between angles 65° and 75° with the horizontal was found convenient for maintaining the constant head. Infiltration rates at different elevations in Durvasa Khola watershed (representing Churia hills of Siwalik type) and Bhabar area were studied using double ring infiltrometer. The infiltration rates vary from moderately slow to moderately rapid rates depending upon soil types and site conditions. Higher infiltration rates were observed with soils having high organic matter content, friable consistency and crumb structure.
