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Further advantages of open wells include:

1) They provide extra storage - so in low permeability soil/rock water can slowly percolate into the well at night or when the well is not in use and then be drawn down less rapidly at peak times. 2) They can be covered and fitted with a handpump installation to reduce the potential for contamination - if the handpump breaks down, and is not able to be fixed, the users can remove the cover and still access the water. 3) They can be deepened if necessary.