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Great Bath, Mohenjo-daro A water well in Lothal Water reservoir, with steps, at Dholavira, Gujarat, India. The ancient Indus Valley Civilization in the Indian subcontinent (located in present-day eastern-Pakistan and north-India) was prominent in infrastructure, hydraulic engineering, and had many water supply and sanitation devices that are the first known examples of their kind.
The Indus Valley civilization in Asia shows early evidence of public water supply and sanitation. The system the Indus developed and managed included a number of advanced features. An exceptional example is the Indus city of Lothal (c. 2350–1810 BCE). [24]
Drainage System: The Indus Valley Civilisation had advanced sewerage and drainage systems. All houses in the major cities of Harappa and Mohenjo-daro had access to water and drainage facilities. Waste water was directed to covered gravity sewers , which lined the major streets.
The plumbing and sewerage systems were formed by early hydro-engineers to allow water and sanitation within the city. These systems were effectively used and maintained by ancient Harappan residents. [9] Dams were hydro-structure built along the Indus River for water management purposes such as collecting, storing and diverting water. [15]
Sewage and waste water for buildings at the site were disposed of via a centralized drainage system that ran alongside the site's streets. [28] These drains that ran alongside the road were effective at allowing most human waste and sewage to be disposed of as the drains most likely took the waste toward the Indus River. [29]
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The construction of these stepwells hit its peak during the 11th to 16th century. The Muslim rulers of the 13th to 16th century did not disrupt the culture that was practiced in these stepwells and encouraged the building of stepwells. The wells lost their significance in the 19th century due to introduction of water pumps and pipe-systems.
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