Contents: 1.introduction 2.Climatics classification 3.Meteorology 4.Precipitation 5.Rainfall characteristics and water balance 6.Rainfall analysis 7.rain water harvesting & recycling 8.Water losses and control 9.Tillage and equipment's 10.Rainwater management 11.Design of water harvesting structures 12.Risk management under drought 13.nutrient management 14.disease-pest management 15.Droughts and drought indices 16.Crop planning 17.Alternate land use planning 18.Watershed management