Which river is most closely associated with the name of the Indus Valley Civilization?

The Indus Valley Civilization takes its modern name from the Indus River region. Its prominent urban centers include Mohenjo-daro in present-day Sindh and Harappa in present-day Punjab. The civilization flourished during the Bronze Age and is known for planned cities, drainage systems and long-distance trade. The Indus River is also a major geographical feature of modern Pakistan.