||The Office of Water Resources Research allotment and matching grant programs provided a firm base for about one-third of the University of Hawaii Water Resources Research Center's research effort. Projects directed toward evaluation of runoff and sediment contributions to quality of surface waters included A-018-HI, A-027-HI, and A-030-HI. Wastewater reclamation potential was evaluated in A-018-HI and A-036-HI. In A-040-HI the pollution potential of sanitary landfill leachate was assayed. Projects directed toward water sufficiency included A-030-HI, concerning the patterns and trends of water demand in southern Oahu; A-031-HI, comparing drip to sprinkle irrigation; and modeling studies of infiltration, water demand, and optimal use of small reservoir systems in A-035-HI, A-037-HI, and A-038-HI, respectively. Radiation well logging and calibration techniques for that work were studied in A-032-HI and A-034-HI. Isotopic means of evaluating water age and movement was researched in B-030-HI. A new rain gage was developed and utilized in B-028-HI. Simulation of urban hydrology and water distribution system design were the objectives of B-028-HI and B-029-HI, respectively.