Patent ID: 8449219

Claim:
A water-storage and water-purification system ( 1 ), comprising: (a) a substantially water-impermeable, artificial, and outwardly delimited reservoir ( 2 ) which is filled at least partially by porous material ( 3 ); (b) at least two adjacent barrier layers ( 5 ) for extending the seepage path of the water, wherein the barrier layers ( 5 ) are disposed within the reservoir ( 2 ) and the barrier layers ( 5 ) are each provided with at least one passage ( 6 ) for water; (c) porous material ( 3 ) located above and below each of the barrier layers ( 5 ); and (d) a water-collecting container ( 4 ) which extends in the reservoir ( 2 ) from a bottom of the reservoir ( 2 ) upwards at least to a surface of the reservoir ( 2 ); wherein the water-collecting container ( 4 ) comprises a first opening ( 7 ) above an uppermost barrier layer ( 5 ) and at least one second opening ( 8 ) below a lowermost barrier layer ( 5 ), through which openings water can flow; wherein the passage ( 6 ) for water takes up a surface area of 5% to 20% in relation to the entire surface of the barrier layer ( 5 ), wherein the passage ( 6 ) for water is disposed in an outer region of the barrier layer ( 5 ) near a sidewall of the reservoir; wherein the passages ( 6 ) for water in each of the at least two adjacent barrier layers ( 5 ) are disposed in an offset manner with respect to each other; and wherein substantially all of the porous material ( 3 ) has pores which have an initial pore diameter of <0.1 μm.