Areas of Groundwater potential zones (sq·km)

Years

Very low

Low

Medium

High

Very High

1992

511.519

502.237

504.837

515.558

485.647

2002

504.208

505.508

532.652

487.615

489.815

2012

505.762

503.552

514.447

505.781

490.256

2022

506.804

508.767

498.699

509.473

496.055

2042

507.910

427.911

731.893

318.925

533.159