During recent years, there was a steady growth in the gross harvest of potatoes in Moscow region, production capacities for processing of agricultural crop have been also increasing. However, based on 2020 results, the yield is still highly dependent on weather conditions and, in particular, on the amount of precipitation during the growing period. Therefore, in order to obtain sustainable yields, it is necessary to maintain the optimal values of the water-air balance, that consider conduction of agromeliorative measures, including additional irrigation. The most economical is drip irrigation among the moisturizing activities. It allows to deliver irrigation water directly to the root zone. This will significantly reduce the cost of water and electricity; however, the maximum benefits of drip irrigation may be obtained by revise and calculation of the irrigation rates. Suggested irrigation rates do not take into account the elliptical shape of the humidification contour, which leads to overestimated rates for it. The method for calculating the irrigation rate proposed in the article, takes into account the shape of the humidification contour that enables to use irrigation water wisely.

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Over the past two years, decrease in potato yield has been observed in the Moscow region. One of the main reasons is unfavorable weather conditions. To obtain a guaranteed yield, as well as to improve the quality of products, it is necessary to carry out reclamation works, including additional irrigation. Creation of the optimal water - air balance of the plant throughout the entire growing season will increase productivity, and improve the quality of agricultural products. Drip irrigation is the most economical method of irrigation, but its widespread use is hindered by the high proportion of manual labor when installing the drip tape. A mechanized method of laying the drip tape by placing the working equipment on the Grimme GF-75/4 comb former is offered. The existing methods for determining the irrigation rate do not consider the parameters of the humidification circuit, which leads to excessive irrigation and additional losses of irrigation water. The paper offers a method for determining the irrigation rate considering the shape of the humidification circuit and its geometric parameters.

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The article describes methods for collecting and processing source data for building a computer model of the delta of river Volga and zones of western substeppe lakes (ilmens). With the help of the computer model being created, the calculated data describing the movement of water in a rivers and channels will be obtained. This information will be used to justify measures to improve the watering of the studied areas.