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Just to make two points: 1. A surface spring does not mean that a hand-dug well will be successful at that location (or even slightly up-stream). Springs can occur in geological conditions unfavourable to hand-dub wells. 2. Even if the formation were favourable, you might find it very difficult to dig a 20m well there, even with caissoned well rings and mechanical dewatering. 3. One issue in Southern Sudan is whether the spring is used just for people or also for watering animals. This should be allowed for in the design, or the needs of the animals will take precedence. Regards, John Cosgrave
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No.2 Revision
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Just to make two points: 1. A surface spring does not mean that a hand-dug well will be successful
at that location (or even slightly up-stream). Springs can occur in geological conditions
unfavourable to
hand-dub
hand-dug
wells. 2. Even if the formation were favourable, you might find it very difficult to dig a 20m well
there, even with caissoned well rings and mechanical dewatering. 3. One issue in Southern Sudan is
whether the spring is used just for people or also for watering animals. This should be allowed for
in the design, or the needs of the animals will take precedence. Regards, John Cosgrave
Just to make two points: 1. A surface spring does not mean that a hand-dug well will be successful
at that location (or even slightly up-stream). Springs can occur in geological conditions
unfavourable to hand-dug wells. 2. Even if the formation were favourable, you might find it very
difficult to dig a 20m well there, even with caissoned well rings and mechanical dewatering. 3. One
issue in Southern Sudan is whether the spring is used just for people or also for watering animals.
This should be allowed for in the design, or the needs of the animals will take precedence. Regards,
John Cosgrave
John