Indus civilization, also called Indus valley civilization or Harappan civilization, the earliest known urban culture of the Indian subcontinent. The nuclear dates of the civilization appear to be about 2500–1700 bce, though the southern sites may have lasted later into the 2nd millennium bce.
Answer: Canals were slower and they would freeze easier in the winter. The wouldnt work in low water during the summers. They were also more expensive.
