==Suitable conditions==
{{Climate_change
|drought_text=- ''Effects of drought'': Tend to dry up quickly. <br> - ''Underlying causes of effects'': Lack of rainfall. <br> - ''To increase resiliency of WASH system'': Site on rock that is bare and free of vegetation/soil with no fractures, so whatever amount of rain ''does'' fall, it will have a greater chance of being collected.
|flood_text= xxx
}}
* The rock that makes up the catchment should be bare and free of vegetation/soil. It should have no fractures or cracks that would result in a loss of water through seepage.
* Site the dams for rock catchments to maximize the natural topography – to get the best storage volume, build on gorges between rocks, rock pools, and rock shelves. Make dams on the lower side of existing rock pools.
==Construction, operations and maintenance==
[[Image:RockCatchmentRoof.jpg|thumb|right|300px|Building a roof for the rock catchment dam to keep it clean and minimise evaporation losses.<br> [http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0CDcQFjAC&url=http%3A%2F%2Fwww.samsamwater.com%2Flibrary%2FBook1_Water_from_Rock_Outcrops.pdf&ei=Ys59T4_iLanM2gXA4NTlDA&usg=AFQjCNFY-XFDfUONAlG7HCp0p7Q4YDDOhw&sig2=UKAZc-rFHN-M4tfVsNOZGQ Water from Rock Outcrops.] DANIDA.]]
[[Image:RockPool.jpg|thumb|right|300px|A rock pool in near Taveta, Kenya.]]
[[Image:MeasureRockGradient.jpg|thumb|right|300px|To measure the rock gradient, a spirit-level horizontal on a 100cm length of timber is used. This rock is determined to be too steep.]]
