METHOD TO INCREASE FRESH WATER OUTPUT IN LENS FLOWING ON SALT WATER AND FORMED UNDER OPEN SAND Russian patent published in 2007 - IPC E03B3/06 E03B3/34 

FIELD: agricultural melioration, particularly water supply in arid zones.

SUBSTANCE: method involves creating radial drain system including tubular drains in explored area with lens border and along with fresh water output determination at ground salt water level; arranging bottomless water drain pit in lower point in which tubular drains meet each other, wherein the drain pit is made as reinforced concrete sleeve with lid provided with orifice; inserting water intake pipe in the orifice so that lower end thereof is inside lens at salt ground water level and upper water intake pipe end is over opened sand lever and is provided with valve; creating closed pit having triangular cross-section in explored area surface along periphery thereof; forming atmospheric precipitation collecting pits in radial directions, wherein the pits are gutters inclined towards water intake pipe; collecting atmospheric precipitations with closed pit and gutters; filtering atmospheric precipitations with sand layer located over drain system and delivering thereof into reinforced concrete collar of water drain pit via tubular drains; using the collected water for domestic use in amount of 60-80% of annular precipitations; preventing of plant grow on open sand within closed pit zone. In the case of salt water ingress in water intake pipe valve is temporary closed.

EFFECT: possibility of stable all-the-year-round fresh water supply.

3 cl, 2 dwg