IMPACT OF THE LEVEL OF SPRINKLER IRRIGATION PROVISION ON THE SPENDING OF WATER AND ENERGY RESOURCES AND ITS OVERALL EFFICIENCY IN CHANGEABLE CLIMATIC CONDITIONS

Abstract

New modern approaches to solving the problem of growing water deficit for irrigation in the context of climate change are  considered, based on the input of the level of its availability indicator, which reflects the reduction of irrigation and irrigation norms relative to their project values, as well as the results of the study of the impact of this indicator on the consumption of  water and energy resources and the overall efficiency of sprinkler irrigation in changeable climatic conditions. The necessity of changing approaches to the implementation of irrigation and moving to nature-oriented and ecologically effective solutions is substantiated. The study was carried out on the basis of a machine experiment using a computer program based on the application of a set of optimization, economicmathematical, forecasting-simulation methods and models, including a model of climatic conditions of the area, a model of water regime and water regulation technologies, as well as crop yield models forforecasting long-term assessment of the technological, economic, environmental and investment efficiency of the facility, the use of which is regulated by the industry standards of the State Agency of Water Resources of Ukraine. It has been experimentally determined that the intensity of the reduction in productivity of the project crop rotation is almost twice lower than the intensity of the reduction in water and electricity consumption for almost most of the considered variants of sprinkler irrigation regimes with different levels of its provision, which is confirmed by the corresponding net income indicators. Thus, the targeted reduction of irrigation water consumption for sprinkler irrigation is a completely reasonable and necessary solution on the way to saving water and energy resources and moving hydromelioration activities to nature-based andecologically effective solutions.