What kind of pump to install for a borewell of 160 feet deep and 1 inch water level, gravel found at this depth?

Hello,

We recently had a 5" inch diameter borewell drilled for domestic use. About 1" inch water level was found at 160 ft depth. The pipe is full of water up to the brim and the over flow rate is 1/2 litre of water per minute.

Small particles of gravel were found after 160 ft. and the technician refused to drill any further. The upper strata of soil consists of coarse sand , and the technician says that there is silt in the water.

Please suggest what type of pump should be installed and the precautions to take to protect the pump and also what quantity of water we can expect per day. The altitude of this town is 1700 metres.

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