Assessment of environmental safety in the influence zone of the current Zelenchukskaya HPP-PSPP and Krasnogorsky HPP-1, HPP-2 under construction in the area of Ust-Dzhegutinsky reservoir location

¹ Novocherkassk Engineering and Land Reclamation Institute named after A.K. Kortunov, Don State Agrarian University, 346428, Novocherkassk, Russia
² WTL branch (USA) in Asia, 119421, Moscow, Russia
³ Branch of the North Caucasus Federal University in Pyatigorsk. North Caucasus Federal University, 357500, Pyatigorsk, Russia
⁴ LLC “Verkhnebalkarskaya MGES”, Deputy General Director-Chief Engineer, 361813, Kabardino-Balkar Republic, Russia

^* Corresponding author: shtawkader.marya@yandex.ru

Abstract

“Environmental safety” in the considered spatial limits of the basin geosystem of Upper Kuban (Fw = 11.0 * 103 km3, W lit.=3.3*103 km3, Watm.=110 * 103 W BGUK =124.3*103 km3) is about 21.4% of the spatial limits of the Kuban River, where water resources are formed according to the average long-term data of about 3.0 km3, which are used in various sectors of economic activity, including the generation of electric energy at the Zelenchukskaya HPP-PSPP and the Krasnogorsk HPP-1 and HPP-2 under construction with an installed capacity of up to 25 MW, located below the Zelenchukskaya HPP-PSPP target and above the target (12 km) Ust-Dzhegutinsky reservoir. Such placement of the Zelenchukskaya HPP-PSPP and the Krasnogorsk HPP-1 and HPP-2 under construction on a 15 km long section of the Kuban Riverbed has determined a highly active zone of influence (IV), which is caused by a change in the natural hydrograph of the Kuban River, with the formation of an unstated hydraulic regime of the channel flow movement on the considered section of the river to the Ust-Dzhegutinsky reservoir. The relentless changes in the water level in the Ust-Dzhegutinsky reservoir affect the pressure safety front structures, the functional operation of the water intake hydroelectric complex in the Bolshoy Stavropol Canal (BSC) and the hydraulic operation of the BSC. To assess the “environmental safety” level, it became necessary to develop a mathematical model of the functional operation influence of the Zelenchukskaya HPP-PSPP and the Krasnogorsk HPP-1 and HPP-2 under construction on the Ust-Dzhegutinsky reservoir operation level modes.