This document outlines the roles that various agencies and professionals play in water resource management. It discusses the contributions of agricultural departments, geologists, meteorologists, chemists, biologists, economists, social workers, politicians, water quality authorities, the general public, NGOs, industries, mechanical engineers, electrical engineers, ISRO, and civil engineers to sustainable water management. Their roles include developing irrigation techniques, assessing water quality, predicting weather patterns, studying ecosystems, performing cost-benefit analyses, educating the public, setting standards, building infrastructure, and ensuring water access and conservation.