Disaster Management can be defined as the preparedness, response and recovery methods in order to lessen the impact of disasters. A disaster disrupts the normal function of the society to the extent that it cannot function without outside help. Disasters can be classified as natural, technological or complex emergencies. Prevention of Natural disaster • Vegetative measures: Preserving vegetation, grasses and trees can minimize the amount of water infiltrating into the soil, slow the erosion caused by surface-water flow, and remove water from the soil. • Structural Measures: Retaining and Diverting water using dams, floodplains, levees etc., Constructing piles & retention walls Improving surface & subsurface drainage Rock-fall protection • Management measures: Integrated river basin approach public awareness, participation and...