The Groundwater Recharge Assessment Tool (GRAT) was developed in partnership with The Earth Genome and Sustainable Conservation. Through a prioritized use of dedicated recharge basins, fallow field recharge, and on-farm recharge sites, it may be possible to balance the water budget and reverse the damage caused by years of over-pumping. On-farm recharge is a relatively new approach and requires an understanding of what crops are being grown, and how flood-year waters could be applied during select weeks of the year when high-flow water is available. To calculate the best use of on-farm recharge and the impact on the water budget, GRAT allows irrigation districts to run an unlimited number of wet-year scenarios, ranking of field types based on soil and crop characteristics, and detailed cost calculations. GRAT allows the automated selection of sites up to a target recharge volume or cost ceiling, and then the manual removal or selection of additional sites based on local expert knowledge. Advanced, dynamic charting gives real-time updates of groundwater balance and estimated costs based on selected sites. Once the balance has been reached, the option to save the plan can be used to share results with decision makers throughout the district.
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