Total evaporation from the surface of river catchments in Western Siberia

An important place in determining the water content of the territory in order to plan the optimal management of water resources, as well as in determining the technology of irrigation regimes to obtain sustainable crop yields, is the calculation of total evaporation. Evaporation, being the main element of the hydrological cycle, connects hydrology with meteorology and agriculture. In plant physiology, transpiration is characterized by the transition of water contained in them into a vapor state, followed by accumulation in the atmosphere. During transpiration, as with conventional evaporation, it is necessary to take into account such atmospheric elements as radiation, temperature and humidity, soil moisture and wind parameters. Therefore, the value of total evaporation, including transpiration and evaporation from the underlying surface (soil, water, snow, ice, etc.) depends on both zonal and azonal factors of the geographical landscape. Of great importance in determining the total evaporation is the correct choice of calculation method that meets the tasks requirements, taking into account the climatic features and fulfilling the conditions of the required accuracy of the calculation results.