PERBINCANGAN TENTANG KEJADIAN DAN PERKEMBANGAN AIR BAWAH TANAH, ALIRAN MELALUI KELIANGAN, PERJALANAN DAN TABURAN AIR KE PERIGI, SALIRAN, PENEBUSGUNAAN, PENCEMARAN AIR BAWAH TANAH DAN PENCERUNAN.((THE DISCUSSION OF GROUNDWATER OCCURRENCE AND DEVELOPMENT; FLOW THROUGH POROUS MEDIA, WATER MOVEMENT AND DISTRIBUTION TOWARDS GROUNDWATER WELLS, DRAINAGE, RECLAMATION PROCEDURES, GROUNDWATER POLLUTION AND SUBSIDENCE.))