%0 Journal Article %T Analysis of energy efficiency of polder of pumping stations in a Slavsk district of the Kaliningrad region %A Spirin, Y.A. %A Puntusov, V.G. %K polder, energy efficiency, pumping equipment, geodesic pressure, weighted average pressure, land improvement, drainage, hydraulic calculation %J Melioration and Water Management %D 2020 %N 2020 %P 5 %I ANO Editorial Board Melioration and water management