INFILTRATION WORKS Russian patent published in 2001 - IPC

FIELD: water supply engineering; applicable in induced infiltration and as slow filters in purification of surface waters. SUBSTANCE: infiltration works include infiltration basin, water supply system and filter media located on basin bottom whose surface is made comb-shaped with an angle of inclination of side surfaces within 30-40 deg. Water supply system has divergent nozzles with internal curved spiral-shaped conductors connected with supply pipe by means of standpoints located above water surface in basin at length of at least 0.5 m. Pressure pipelines having at their ends convergent nozzles with curved helical grooves at internal surface of nozzle part are installed at level of combs with basin bottom longitudinal inclination of at least 20%. EFFECT: higher efficiency. 3 dwg