Borewell Recharge Rate Calculator - Rainwater Harvesting

Enviraj Consulting

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Borewell Recharge Test

Groundwater recharge through the borewell is one of the widely used methods in rainwater harvesting. This method is ideally suitable for very deep water levels (more than 15 meters). Recharge tests can quickly provide site-specific suggestions for borewell selection. To run a recharge test, follow the steps below:

1- Measure the static water level (SWL)
2- Fill the borewell up to the top of the casing using a water tanker
3- Take note of the initial water level
4- Note water level at regular intervals up to 30 mins or until it approaches the static water level
5- Determine Tf, the time it takes to return to a near-static water level (about 2 metres from SWL) and note the final water level
6- Feed the data into an online tool to get results

Static Water Level (mbgl)

Water Level in a well under normal, undisturbed conditions

Initial Water Level (mbgl)

Water Level in a well during the start of recharge test

Final Water Level (mbgl)

Water Level in a well at the end of recharge test

Recovery Time - Tf (mins)

Time between initial and final water level(s)

Borewell Dia (mm)

Avg. Recharge Rate (m/min)	Recharge Capacity (LPH)	Verdict

Diff	Difff	Difff	Difff	Difff

Note:

Ideally, the final water level should return near to static water level within 30 mins. If this takes longer time, the well is considered inefficient and hence not recommended for groundwater replenishment.

Depending upon volume of water to be recharged, number of recharge wells can be increased to enhance the recharge rate

Recharge test field sheet (Sample)

We appreciate any comments and tips on how to make our online tools a better information source. If you find any faults, inaccuracies, or otherwise unacceptable information, please contact us by email info@enviraj.com

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Borewell Recharge Test

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