Water conservation for time

AGRASEN KI BAOLI in Delhi is a stepwell built on four levels. It was probably built in the 14th century by wealthy merchants, in the name of Raja Agrasen, the grandfather of Krishna and Balram.

108 steps lead downwards to the water level. The first two levels have niches in the walls that must have served as meeting places, and there are passages and rooms inside the baoli. In the northern end of the baoli is a well. In the past, as the water rose in the well, it would fill the baoli from the bottom to the top level. The steps were built next to the shafts of wells so that whatever the level of the groundwater, residents could always access some.






It seems likely that there was a stepwell here many centuries ago, we know for example, that the Bronze Age Indus Valley Civilization built these water-harvesting structures. 

But this isn't the only Baoli in Delhi, or the most famous. 

The HAZRAT NIZAMMUDIN BAOLI is situated at current day Hazrat Nizam-ud-din basti. Legend has it that while Khwaja Nizam-ud-din Auliya was building this in 1321-22, the ruler, Ghiyas-ud-din Tughlaq was trying to build Tughlakabad. He forbade the workers from working on the baoli, so they would help the sufi saint at night. To light their way, Chiraguddin Auliya, a disciple of the Khwaja's, lit lamps with water instead of oil.  The water here is also believed to have healing powers. And the Khwaja cursed Tughlaqabad to be a ruin.

However, when Ghiyas-ud-din Tughlaq realised the issue of water scarcity which resulted from the curse of Nizammudin Chishti, he planned 13 well-dug baolis in TUGHLAQABAD Fort. However, only two baolis can be identified in the fort premises today: 

RED FORT BAOLI - A rare L shaped baoli, this baoli is believed to be older than Red Fort itself and has been constructed with uniform sized stones. 

FEROZ SHAH KOTLA BAOLI - the only circular one in Delhi, and also the largest in terms of area, this 14th century baoli was built within Feroz Shah Kotla by Feroz Shah Tughlaq as he tried using the construction of structures to save the people from a collapsing economy. 
LOHARHERI BAOLI - Discovered very recently, this baoli in Dwarka was covered with dense vegetation. It could have belonged to ironsmiths, therefore the name. It is the smallest baoli in Delhi with just 20 steps to the tank. 
RAJON KI BAOLI - This well-kept baoli that was built in 1516 in Mehrauli reflects the time when it was built, i.e. during the reign of the Lodis. This baoli is four storeys deep and attached to a mosque. The walls of the baoli also adorn calligraphic inscriptions from the Quran. It is also the largest and the most ornate of the three baolis in the complex. 
MUNIRKA BAOLI - Built in 1526 ( odd to think of the 16th century as rather recent but there it is), this stands between a gurudwara and a temple. Known for its design, it is surrounded by well-manicured lawns now. Interestingly, the baoli also has another well within the complex. This baoli makes for an interesting visit as it is exemplified Lodi-style architecture.

OLD RIDGE BAOLI - Built in 1354 this baoli is situated within the Hindu Rao hospital complex and close to the main hospital building. It was the only source of water during the 1857 war of independence. 
PURANA QILA BAOLI - Built in: 1538 and situated in the Old Fort complex, this baoli had 89 steps to reach the water level and is fully functional!  
ARAB SARAI KI BAOLI - Built in the 16th century by Akbar, this is the second smallest baoli in Delhi and located in the Humayun's Tomb complex so is a Unesco World Heritage Complex and the architecture is unique. 

But this is just one of the many systems of water conservation that India employed over the centuries. Our traditional systems in water harvesting and storage included capturing rain water and reducing evaporation losses by planting trees on the periphery or by building a wall across a stream to retain water in the dry season. 

There were traditional techniques of water conservation used across India that have lasted for centuries. Just one example from each corner of India is given below -  

Johads and Naadis in Rajasthan - johad/ pokhar or a percolation pond[1], is a community-owned traditional harvested rainwater storage wetland principally used for effectively harnessing water resources in the states of HaryanaRajasthanPunjab, and western Uttar Pradesh of North India, that collects and stores water throughout the year, to be used for the purpose of recharging the groundwater in the nearby water wells, washing, bathing and drinking by humans and cattle. Some johads also have bricked or stones masonry and cemented ghats 
Johad at Rithal village of Rohtak district of Haryana
Eris tanks in Tamil Nadu  - cascading tanks built several hundred years ago to utilize the water flowing in the rivers to the fullest before it reached the sea. It was a simple act of engineering that involved diversion of river water into tanks through dug out earthen channels and then diversion into a series of cascading tanks so that the outflow from one tank would serve as the inflow for the next one. 

Surangam tunnels in Karnataka and Kerala  - Suranga (also Surangam or thurangam) (English: Tunnel well) is a traditional water management system used to provide a reliable supply of water for human settlements and irrigation in Kasargod district of Kerala and Dakshin Kannada district of KarnatakaIndia.[1][2][3] A suranga is basically a horizontal tunnel dug in the slope of a laterite hill for about 30 metres (98 ft) to 40 metres (130 ft), which uses gravitational force for extraction of the underground water and collect into a storage tank.[2] As both the areas are covered by uneven and steep laterite hill which makes boring of traditional bore well hard and expensive, surangas are considered as a relatively cheap option. 

All these are managed by local community members, and use minimum or no fossil fuel-based energy. They maximized the availability of water by minimizing the loss of water by combining  natural and man-made waterways and architecture in an aesthetic and functional way.

Even today, most of these techniques form the basis of our current day water conservation efforts, like rainwater harvesting, groundwater recharge, drip-irrigation, and revitalizing freshwater bodies in cities, towns and villages.

 Try reading this site to know more - 

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