Integrated modeling on water resource management
World is facing a water crisis and increasing in recent years. It is necessary to understand the water system from source to sink and about 10% of total annual runoff is being used. Agriculture is found largest direct user of water. Asia is consuming about 23%, highest percentage of available water resources. Various steps for efficient water resources management are discussed. Decision support System (DSS) for water resources management is formulated with input of water balance model, water use model, surplus water use model, environmental sustainable model and water pricing & cost recovery model. Water resources development model (WRDM) is linked with DSS model. Main issues on management of water resources are critically focused.