Thanks Andrew & Randall for ...

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Thanks Andrew & Randall for your responses. The thumb rules Andy shared are useful. 

The information I had sought was to evolve parameters for crop-water budgeting during non-monsoon season (cropping is dependent on irrigation). As the area has very little ground water development, most of the water is accessed using shallow wells.

Ascertaining water availability in the shallow wells has been tricky - as water yields in wells vary widely - influenced by geology.

We have developed a GIS tool called the Composite Land Assessment and Restoration Tool (CLART) - developed by overlaying geology, linaments, drainage pattern, slope and land use to come up with a recharge map - to show the recharge potential. While the tool helps ascertain recharge % based on recharge potential, ascertaining the % available in shallow wells has been difficult.

Are there specific research papers that provide algorithms to calculate the same

 

Regards