An Instrumented Lysimeter System for Monitoring Salt and Water Movement

摘要: A lysimeter system is described which consists of four continuously weighing lysimeters mounted on a portable platform. The lysimeters, made from low pressure PVC irrigation pipe (1.18 m deep by 0.31 dia), are placed hydraulic that of either water-filled rubber pillow or an automotive innertube connected to water column. sensitivity of the 0.1 kg equivalent water depth 1.4 mm. One bar ceramic cups, placed in the center the at 0.25, 0.50 and 0.75 the soil surface, are connected outside for soil solution sampling. Eight small bolts symmetrically located around same depths as ceramic cups, serve "four probe" contacts electrical conductivity measurements. cost each set four lysimeters 1978 was about $400.