Water has been harvested in
Traditional rainwater harvesting which is still prevalent in rural areas was done in surface storage bodies like lakes, ponds, irrigation tanks, temple tanks etc. In urban areas, due to shrinking of open spaces, railways will have to necessarily be harvested as ground water, hence harvesting in such places will depend very much on the nature of soil viz., clayey, sandy etc.
According to Londonkar (2007) various kinds of traditional rainwater harvesting can be described as follows:
S Paar System
Paar is a common water harvesting practice in the western Rajasthan region. It is a common place where the rainwater flows from the agar (catchments) and in the process percolates into the sandy soil. In order to access the rajani pani (percolated water) kuis or beris are dug in the agar (storage area). Kuis or Beris are normally 5 mts to 12 mts deep. The structure was constructed through traditional masonary technology.
This is the most predominant form of rainwater harvesting in the region. This method is also known as Patali Paani.
S Talab / Bandhis
Talabs are reservoirs. They may be natural, such as the ponds (pokhariyan) at tikamgarh in the bundelkhand region. They can be human made. A reservoir area of less than five bighas is called a talai, a medium sized lake is called a Bandhi or Talab, and bigger lakes are called sagar or samand. The pokhariyan serve irrigation and drinking purposes.
S Saza Kuva
An open well with multiple owners (Saza = partner), Saza Kuva is the most important source of irrigation in the Aravalli hills in Mewar, eastern Rajasthan. The soil dug out to make the well pit is used to construct a huge circular foundation or an elevated platform sloping away from the well.
Saza Kuva construction is generally taken up by a group of farmers with adjacent landholdings.
Johads are small earthen check dams that capture and conserve rainwater, improving percolation and groundwater recharge. Starting 1984, the last sixteen years have seen the revival of some 3000 Johads spread across more than 650 villages in Alwar district, Rajasthan. This has resulted in a general rise of the groundwater level by almost 6 metres and a 33 percent increase in the forest cover in the area.
Five rivers that used to go dry immediately following the monsoon have now become perennial, such as the River Arvari, has come alive.
S Pat System
This system was devised according to the peculiarities of the terrain to divert water from swift-flowing hill streams into irrigation channels called pats. The diversion bunds across the stream are made by piling up stones and then lining them with teak leaves and mud to make them leak proof. The pat channel has to negotiate small nullahs that join the stream off and on and also sheer cliffs before reaching the fields.
The villagers irrigate their fields by turns. The channel requires constant maintenance and it is the duty of the family irrigating the fields on a particular day to take care of the pat on that particular day.
S Naada / Bandha
Naada/Bandha is found in the Mewar region of the
A Rapat is a percolation tank, with a bund to impound rainwater flowing through a watershed and a waste weir to dispose of the surplus flow. If the height of the structure is small, the bund may be built of masonary, otherwise earth is used. Rapats and percolation tanks do not directly irrigate land, but recharges well within a distance of 3-5 km downstream.
S Chandela tank
These tanks were constructed by stopping the flow of water in rivulets flowing between hills by erecting massive earthen embankments, having width of 60m or more. These hills with long stretches of quartz reefs running underneath them, acted as natural ground water barrier helping to trap water between the ridges. The earthen embankments were supported on both sides with walls of coarse stones, forming a series of stone steps. These tanks are made up of lime and mortar and this is the reason why these tanks survived even after thousand years but the only problem, which these tanks are facing, is siltation of tank beds.
S Bundela Tank
These tanks are bigger in size as compared to Chandela tanks. These tanks had solidly constructed steps leading to water in the tank but these structures had chabootaras, pavillions and royal orchards designed to show off the glory of the king who built them. But these tanks are not as cost effective and simple as Chandela tanks. These tanks were constructed to meet the growing water demands in the area; maintenance of these tanks was done by the person employed by the king but in case of smaller tanks villagers collectively removed silt and repair embankment.
S Kunds / Kundis
A kund or kundi looks like an upturned cup nestling in a saucer. These structures harvest rainwater for drinking, and dot the sandier tracts of the Thar Desert in western Rajasthan and some areas in
They can be owned by only those with money to invest and land to construct it. Thus for the poor, large public Kunds have to be built.
S Baoris / Bers
Baoris or bers are community wells, found in Rajasthan, that are used mainly for drinking. Most of them are very old and were built by banjaras (mobile trading communities) for their drinking water needs. They can hold water for a long time because of almost negligible water evaporation.
Jhalaras were human-made tanks, found in Rajasthan and
Nadis are village ponds, found near
Tobas is the local name given to a ground depression with a natural catchment area. A hard plot of land with low porosity, consisting of a depression and a natural catchment area was selected for the construction of Tobas.
Tankas (small tank) are underground tanks, found traditionally in most
The tanka system is also to be found in the pilgrim town of
A khadin, also called as a dhora, is an ingenious construction designed to harvest surface runoff water for agriculture. Its main feature is a very long (100-300 m) earthen embankment built across the lower hill slopes lying below gravelly uplands. Sluices and spillways allow excess water to drain off. The khadin system is based on the principle of harvesting rainwater on farmland and subsequent use of this water-saturated land for crop production.
A similar system is also reported to have been practiced 4,000 years ago in the Negev desert, and in southwestern
S Vav / vavdi / Baoli / Bavadi
Traditional step wells are called Vav or vavadi in Gujarat, or baolis or bavadis in Rajasthan and northern
S Ahar Pynes
An ahar is a catchment basin embanked on three sides, the 'fourth' side being the natural gradient of the land itself. Ahar beds were also used to grow a rabi (winter) crop after draining out the excess water that remained after kharif (summer) cultivation.
Pynes are artificial channels constructed to utilize river water in agricultural fields. Starting out from the river, pynes meander through fields to end up in an ahar. Most pynes flow within 10 km of a river and their length is not more than 20 km.
According to Willcocks, the distinguishing features of the irrigation system were:
ü The canals were broad and shallow, carrying the crest waters of the river floods, rich in fine clay and free from coarse sand.
ü The canals were long and continuous and fairly parallel to each other and at the right distance from each other for purposes of irrigation.
ü Irrigation was performed by cuts in the banks of the canals, which were closed when the flood was over.
S Dungs or Jampois
Dungs or Jampois are small irrigation channels linking rice fields to streams in the Jalpaiguri district of West Bengal.
S Kohli Tanks
The Kohlis, a small group of cultivators, built some 43,381 water tanks in the district of Bhandara,
Kuls are water channels found in precipitous mountain areas. These channels carry water from glaciers to villages in the Spiti
Naula is a surface-water harvesting method typical to the hill areas of Uttaranchal. These are small wells or ponds in which water is collected by making a stone wall across a stream.
Zings are water harvesting structures found in Ladakh. They are small tanks, in which collects melted glacier water. Essential to the system is the network of guiding channels that brings the water from the glacier to the tank. As glaciers melt during the day, the channels fill up with a trickle that in the afternoon turns into flowing water. The water collects towards the evening, and is used the next day.
A water official called the churpun ensures that water is equitably distributed.
Tanks, called Kere in Kannada, were the predominant traditional method of irrigation in the Central Karnataka Plateau, and were fed either by channels branching off from anicuts (chech dams) built across streams, or by streams in valleys. The outflow of one tank supplied the next all the way down the course of the stream; the tanks were built in a series, usually situated a few kilometers apart.
a) No wastage through overflow.
b) The seepage of a tank higher up in the series would be collected in the next lower one.
Other types of rain water harvesting are: