Customary praxis in execution of water storages are high rising water tanks manufactured in synthetic material for instance or multilayered walls with core concrete. More ordinary these methods are used at ground level. In either case, however, solar radiation leads to water warming and evaporation. These water storages are used for roofe catchement
Systems.
Furthermore there are resources in such as surface water
(rivers, lakes, reservoirs) and groundwater
(wells, springs, boreholes). Each of these three water catchment Systems are state of the art actually. But there will be a combination, a more pracicable solution, investors have to be found for.