Water Resources Activities in the United States: pt. 20. Water resources of Hawaii. Pt.21. Evapo-transpiration reduction. Pt. 22. Weather modification. Pt. 23. Evaporation reduction and seepage control. Pt. 24. Water quality management. Pt. 25. River forecasting and hydrometeorlogical analysis. Pt. 6. Saline water conversion. Pt. 28. Water resources research needs. Pt. 30. Present and prospective means for improved reuse of water. Pt. 31. Impact of new techniques on integrated multiple-purpose waterdevelopment. Pt. 32. Water supply and demand