Author(s): A. V. Babkin
Linked Author(s):
Keywords: Heat; Water balance; Precipitation; Arid are
Abstract: The aim of the work is the development of the mathematical model for research of the moisture and water-thermal regime dynamics within arid and semi-arid areas. The base of model is the differential equations of water and heat balance of soil. The income of energy (absorbed solar radiation), water outcome components (evaporation and run-off) and energy outcome components (turbulent heat-exchange of ground surface with atmosphere, evaporation and effective radiation) were related through heat and water storage of soil. The relations between income-outcome characteristics and storage components permitted the soil water and heat balance equations to combine into the system. Its solution reflects the response of dry area water and thermal regime characteristics to variation in atmospheric precipitation. The temporal variations in precipitation were simulated leap-pattern and linear functions. The increase of precipitation within arid and semi-arid areas causes the growth of soil water storage, evaporation, runoff and absorbed solar radiation, while the soil energy storage and its outcome for turbulent heat-exchange of ground surface with atmosphere and effective radiation tends to decrease. The case study calculations were for the dry area of Caspian Lowland and Western Kazakhstan.
Year: 2003