Mathematical Modeling of Water Regimes on Drained Lands

Abstract

The model of the dynamics of the ground water level (CWL) in the area between the drains during pressure regulation in the drains in the conditions of a three-layer soil structure is proposed and implemented. Having the connection between ground water level and humidity in the aeration zone established on the basis of the conducted experiments, the issue of ensuring the necessary humidity in the aeration zone within the root system is resolved.As a result of the regulation of GWL in different modes (passive reduction and humidification) taking into account natural conditions, in particular, based on the received database on the amount of precipitation, the necessary parameters were obtained that characterize the water regime in the aeration zone. The analysis of the obtained results allows for establishing and proposing more effective resource-saving modes of moistening under the condition of a sufficient supply of moisture to the root layer.In the conducted experiments, the accumulated precipitation in the active layer (0-0.6 m) of the soil in the mode of passive reduction of GWL, when an accumulative capacity for moisture retention is formed in the upper layers of the soil, was used as efficiently as possible.