ВЛИЯНИЕ УРОВНЕЙ ГРУНТОВЫХ ВОД НА ПЕРЕЗИМОВКУ КУЛЬТУР И ЗАТРАТЫ ЭНЕРГОРЕСУРСОВ ПРИ ЭКСПЛУАТАЦИИ ПОЛЬДЕРНЫХ СИСТЕМ С МАШИННЫМ ВОДООТВОДОМ

Analysis of functioning conditions of ameliorative systems, which effect the hibernation of winter crops and perennial grasses, was carried out. Possibility of ground water table control in polder systems with pump water drain closer to the surface, than it is required according to condition of preventing heaving of soil, was considered. It was demonstrated that higher position of ground water tables during no vegetation period, from one side, aggravates hibernation conditions and results in increasing the danger of soil heaving, from the other side it reduces the danger of crops losses from blowout and enables saving of energy, required for pumping out of water.