Answer :
traditionally, they built wells in all the houses as they mostly were farmers
they made small dams across rivers with stones
the collected water from the roof, floods,etc. and stored it in tanks
they made small dams across rivers with stones
the collected water from the roof, floods,etc. and stored it in tanks
Water having system goes through many forms and methods like Surface runoff harvesting which is runoff waters are caught from surfece area, Roof top rainwater harvesting. which is a method to catching water where it falls. The main advantages of doing so is to reduce soil erosion, to increas water quality in aquifers. etc.