PARAMETER SELECTION AND TESTING THE SOIL-WATER MODEL SOIL

The soil water and heat simulation model SOIL was tested for its suita bility to study the processes of transport of water in soil. Required parameters, particularly soil hydraulic parameters, were determined by field and laboratory tests for some common soil types and for soils s ubjected to contrasting treatments of long-term grassland and tilled l and under cereal crops. Outputs from simulations were shown to be in r easonable agreement with independently measured field drain outflows a nd soil water content histories.