he Indus Valley Civilization (IVC), also known as the Harappan Civilization (c. 2600 1900 BCE), is renowned for its advanced and scientific sense of town planning. Unlike other ancient contemporary civilizations, the Harappans followed a systematic urban layout that reflects their expertise in engineering and hygiene.
Main Features of Town Planning
1. Grid System:
The most striking feature was the Grid System. Streets and lanes were laid out according to a set plan, cutting each other at right angles (90), effectively dividing the city into rectangular blocks.
2. Division of the City (Citadel and Lower Town):
Most Harappan cities were divided into two parts:
- The Citadel (Acropolis): Built on a raised mud-brick platform, this area contained large structures like the Great Bath and Granaries. It was likely inhabited by the ruling class.
- The Lower Town: Located at a lower level and much larger in area, this part consisted of small residential houses for the common people.
3. Advanced Drainage System:
The Harappans had the most sophisticated drainage system in the ancient world.
- Every house had its own soak pit and was connected to the main street drains.
- Drains were covered with loose bricks or stone slabs for regular cleaning, showing a high concern for public health and sanitation.
4. Residential Buildings:
Houses were built of baked bricks of a uniform size ($4:2:1$ ratio). Most houses were multi-storied with a central courtyard, a private well, and a separate bathing area. Interestingly, no windows faced the main streets, which suggests a preference for privacy.
Conclusion
The urban planning of the Indus Valley Civilization was far ahead of its time. The emphasis on cleanliness, the use of burnt bricks, and the organized street layout prove that the Harappans were master urban planners whose techniques remain relevant even in modern civil engineering.
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