ASSESSMENT OF INTEGRATED RECONSTRUCTION AND MODERNIZATION IRRIGATION SYSTEMS

The purpose of the work: comprehensive reconstruction, including the reconstruction of the irrigation network and increasing water availability, increasing the efficiency (efficiency) and ensuring guaranteed receipt of agricultural products; modernization-provides for the replacement and renewal of individual elements of the GTS. To select the most appropriate option, the target function is used, taking into account the given costs for the reconstruction or modernization of the system, the profits from irrigation of agricultural crops and the indicators of the technical level of the system. Based on the technical and economic comparison, four options were considered: complex and partial reconstruction; modernization of irrigation systems and current repairs. According to the objective function, the optimal version of the sys-tem is selected based on the minimum cost reduced to the estimated year. Carrying out a comprehensive reconstruction will increase the availability of water resources to the system to 100 %, increase the main indicators of the technical condition of the system: KZI – more than 90 %, efficiency-up to 0.85-0.95, the depth of siltation of the ground water level-more than 2.5-3.5 m, will ensure guaranteed receipt of agricultural products-up to 90-100 %. Among all the variants, the objective function is the smallest for complex reconstruction. Partial reconstruction provides for certain types of work, which allows to increase the water supply of the system to 60-80 %, KZI - to 0.60-0.80, efficiency-to 0.80, guaranteed production of up to 80 %. The option of modernization of irrigation systems gives the same values of indicators as for partial reconstruction. We consider two examples of calculating the objective function, where the minimum value was obtained for both variants of the complex reconstruction. The algorithm of computer calculations for choosing the optimal option is developed.