عنوان مقاله [English]
A lot of water is wasting through the canals and ponds. The use of geosynthetic materials such as geomembrane liners, have been welcomed by farmers due to their low cost, rapid installation and low water seepage. In this research, seepage water lost in 7 ponds with HDPE geomembrane lined in Semnan province was studied. To determine water lost, ponding method was used. The results showed that in the pools that were lined with HDPE geomembrane, the amount of water seepage lost was 4.5 to 46 (meanly 25) mm/m2/day. Water seepage losses in the stone and cement of pools was 74.5 to 84 (meanly 80) mm/m2/day. So, water seepage in geomembrane lined pools in about 30% of ston-lined pools. Water seepage losses in Geomembrane lining, was 20 times less than ston-lined. High-speed, short implementation time, lower cost, greater durability and very good seal, are the most important reasons for accepting the Geomembrane covers. The biggest weakness of the Iranian Geomembranes plates was width low. Low width sheets, increased cost of the projects.