Modeling dynamics of stored soil moisture at stage of control of structures of amelioration systems

Abstract

The article contains the results of development of a methodology for assessing and optimizing the water regime on agricultural lands. To ensure an environmentally safe mode of humidification, operational instrumental control of dynamics of soil moisture reserves is necessary. A distinctive feature of the developed rational regime of hydro-reclamation is its inherent and appropriately justified dynamics of soil moisture reserves as a whole during the growing season and in specific phases of plant development. Methods of mathematical modeling allow us to fully and quickly present the humidity picture of the field. With this approach, it is necessary: to establish the number of experimental points in the actual boundaries of the agricultural field, required for mathematical modeling of soil moisture reserves; to determine the coordinates of the points where you should quickly measure the soil moisture and which, in turn, will be representative or characteristic, based on the most complete account of the set of properties of the field; take the optimal soil moisture for the cultivated crop and the time interval or hydro-reclamation norm , representative in general for the field; justify the representative depth of the sensor installation (sampling) in order to assess the humidity of the calculated soil profile. In the feasibility study of the support network points, using the materials of field surveys, maps of hydrozole soil moisture reserves are modeled and the statistical structure of fields of humidity of the active layer of soils in various natural hydration years. The developed method is recommended to be used for objective and qualitative assessment of the natural water regime of soils on agricultural land in the operational formation of reclamation impacts in the process of managing the structures of drainage and irrigation systems.