Tun daga shekarun 1950, injiniyoyi sun yi nasarar tsarawa tare da geomembranes.Amfani da geomembranes, wanda kuma ake magana da su a matsayin masu sassaucin ra'ayi (FMLs), ya karu sakamakon karuwar damuwa game da gurbatar albarkatun ruwa masu mahimmanci.Layukan labule na gargajiya, kamar su kankare, admi...
Kara karantawa