Abstract

When irrigation of land in the arid zone, one of the mandatory elements for maintaining the water-salt balance is soil washing. At present, washing standards are calculated and recommended for different soils. However, these calculations are based mainly on experimental data. To increase the efficiency of washing, and also to save irrigation water, it is necessary to investigate the mechanism of desalinization of the soil during washing. In this paper, we propose a method for calculating the rate and degree of desalination of soils based on the analysis of the motion of salt particles. The main calculation element is the velocity and range of the particle’s salt in solution. This method makes it possible to justify and determine the technology of clock leaching of saline soils. The paper presents the results of applying mathematic modeling methods to the example of the left-bank Tentek Irrigation Massif. The basis of the modeling was laid the basic equation of salt transfer with the calculation of the coefficients included in it according to the actual data. As a result, net wash rates were obtained for saline lands, depending on the physicochemical properties of the soils of the investigated massif.

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