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Natural rock catchment and Open water reservoir

625 bytes added, 17:27, 5 April 2012

→‎Costs

==Costs==

[[Image:RubbleStones.jpg|thumb|right|300px|Rubble stones save about 50% of the cost of cement, sand, and ballast.]]

There are 3 types of rock catchment costs to compare:

# Earthen dams are the easiest and cheapest to construct using manual labor or animal draught (yet vulnerable to seepage, erosion, and evaporation).

# Rubble stone masonry dams are cheap to build and maintain (but have large evaporation losses yet no seepage. Evaporation can be prevented by building a roof).

# Water tanks are the most expensive to build (but have no seepage or evaporation losses, only limited amount of water by the size of the tank).

==Field Experiences==

Winona

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