Location: Arava, Negev Desert     Client: Jewish National Fund     Completed: 1983     Team: Shlomo Aronson, Stanley Fields,     Shoshi Keinan,Hadass Benmeir.		Geological analysis in this area  showed a layer of clay capping  a permeable layer of stone,  creating a high water table. By  removing alluvial debris and the  clay layer, water was allowed  to percolate into a small lake.  The sides of the lake were lined  with river-washed stone, the  bottom left unlined to allow the  upwelling of water. Sapir lake  has been developed into a   desert oasis for recreation.