River and River Basin Diversity of Deltic Bangladesh
Rivers are the key point of natural resources, integrated with the culture and civilization of related people. Early civilizations like in ancient Egypt (River Nile), Mesopotamia (River Tigris–Euphrates), ancient China (River Yellow and Yangtze) and Indus valley (River Indus) still bears the sign of social system – a history of mankind. In Indian sub-continent, the Indus valley civilizations namely Harappa and Mohenjo-Daro are noted for their ancient cultural ramifications and urban designs.