Substantiation of Irrigating Additional Areas at the Local Runoff Due to the Hydrologic Computation Automating

Abstract

Purpose: involvement of lands in irrigation using local runoff sources by simplifying and automating hydrological computations of spring floods according to the methodology in the absence of observational data with the possibility of minimal use of reference literature. Materials and methods. The program was developed in MS Excel and is designed to calculate the water body flow rates and build estimated flood hydrographs in the absence of hydrological observation data. Normative and methodological sources were used as initial reference materials. Results. The structure of the program, which consists of four interconnected blocks, in which sequential calculations are performed is given. Block 1 contains reference materials from the methodological literature that are necessary for the calculation. In block 2, the initial data is entered and the maximum instantaneous costs are calculated. Block 3 is intermediate, as it does not contain output data, but serves as a mathematical basis for further graphical construction of hydrographs. For their construction, data on analogue rivers are used. Block 4 displays the main calculated data: maximum discharges, runoff volumes and hydrographs for given reproducibility. Calculation algorithms for blocks 2 and 3 and output data for block 4 are presented. Conclusions. The possibility of involving agricultural lands in irrigation at the expense of local runoff reserves can be achieved thanks to the algorithm proposed by the authors and the program for calculating the maximum spring flood water discharges for various provision. This approach can significantly reduce the calculation of specified parameters by automating the process of selecting reference data and improve their accuracy by eliminating errors. All formulas used in this work comply with regulatory and methodological documents.