short note on indus valleywater system
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The ancient Indus Valley Civilisation of South Asia, including current day Pakistan and Northwest India, was prominent in hydraulic engineering, and had many water supply and sanitation devices that were the first of their kind.
Among other things, they contain the world's earliest known system of flush toilets. With a number of courtyard houses having both a washing platform and a dedicated toilet / waste disposal hole. The toilet holes would be flushed by emptying a jar of water, drawn from the house's central well, through a clay brick pipe and into a shared brick drain, that would feed into an adjacent soakpit (cesspit). The soakpits would be periodically emptied of their solid matter, possibly to be used as fertiliser. Most houses also had private wells. City walls functioned as a barrier against floods.
The urban areas of the Indus Valley civilization provided public and private baths, sewage was disposed through underground drains built with precisely laid bricks, and a sophisticated water management system with numerous reservoirs was established. In the drainage systems, drains from houses were connected to wider public drains.[1]