1. The document discusses various options for integrated water management to address increasing water demand, such as developing available water resources, harvesting rainwater, mining non-replenishable groundwater, conserving water sources from pollution, water reuse, importation, efficiency, and graywater reuse. 2. Water is classified according to its source and quality, including black, blue, gray, and green water. Recently, terms like virtual water and shadow water have also emerged. 3. Blue water refers to fresh surface and groundwater.