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Advanatages

Relatively cheap Simple and easily understood and maintained Skills often available locally Comparing wells of similar depth, an open well has a large surface area and hence yield than a hand drilled well, but a hand drilled well can extend deeper into the aquifer Open wells can be covered and fitted with pump

Disadvantages

Hand drilled wells often cheaper and quicker to drill Open wells open to contamination from runoff, air borne pollutants and contamination of water lifting equipment Excavation dangerous and requires support in unsolidated ground Limited depth (due to labour requirements) so only suits shallow aquifers (<50m) Lifting water with windlass/bucket is labour intensive

Advanatages

Relatively cheap Simple -Relatively cheap

-Simple and easily understood and maintained Skills maintained

-Skills often available locally Comparing locally

-Comparing wells of similar depth, an open well has a large surface area and hence yield than a hand drilled well, but a hand drilled well can extend deeper into the aquifer

Open

-Open wells can be covered and fitted with pump

Disadvantages

Hand -Hand drilled wells often cheaper and quicker to drill Open drill

-Open wells open to contamination from runoff, air borne pollutants and contamination of water lifting equipment Excavation equipment

-Excavation dangerous and requires support in unsolidated ground Limited ground

-Limited depth (due to labour requirements) so only suits shallow aquifers (<50m) Lifting (<50m)

-Lifting water with windlass/bucket is labour intensive