Технико-экономические показатели наливных водохранилищ польдерных систем в зоне Полесья.
Abstract
Практика создания наливных водохранилищ, выполненных гидронамывным способом в зоне Полесья, показывает, что фильтрация воды из водохранилищ, расположенных на песчаных грунтах, в течение года может достигать величины, равной объему самого водохранилища при напорах 4,5 – 6 м. Противофильтрационная защита, выполненная из полиэтиленовой пленки, уложенной по внутреннему откосу в виде понура, не дает желаемого результата. Интенсивность спада снижается примерно в 2 раза по отношению к аналогичному участку без защиты. Наблюдения на водохранилище «Жидче» показали, что спустя 13–15 лет объемы фильтрации стабилизировались в объеме 3 м 3/сут. на погонный метр дамбы. На других аналогичных водохранилищах спад фильтрации произошел в течение 5–7 лет от начала их эксплуатации. = Practice of creation of the bulk water basins executed in the hydroalluvial way in a zone of Polesye, shows, that the filtration of water from the water basins located on sandy soil within year can reach the size equal to volume of the water basin at pressures 4,5 – 6 m. Protection against filtration executed from a polyethylene cloth, laid on an internal slope in a kind screen, does not give desirable result. Intensity of recession decreases approximately in 2 times in relation to a similar site without protection. Supervision on a water basin «Zhidche» have shown, that later 13–15 years filtration volumes were stabilised in vol-ume 3 m 3/days on dam running metre. On other similar water basins filtration recession has occurred within 5–7 years from the beginning of their operation.References
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