Rain Water Harvesting
Rain Water Harvesting
Rainwater Harvesting: Rainwater harvesting is the accumulation and storage of rainwater for reuse before it runs-off. Uses include water for the garden, water for livestock, water for irrigation etc. Due to increasing problems resulting from multi-purpose river projects, water harvesting systems are an alternative for improvement in water availability. It does not harm the environment also.
In India, there existed an extraordinary tradition of water harvesting system keeping in mind the climatic conditions and water needs. People had knowledge of rainfall systems and techniques to harvest groundwater, rainwater, river water and flood water.
Rainwater Harvesting Methods in India
1. Khadins and Johads: In arid and semi-arid regions, agricultural fields were converted into rainfed storage structures that allowed the water to stand and moisten the soil like the Khadins in Jaisalmer and Johads in other parts of Rajasthan.
2. Rooftop rainwater harvesting: People living regions of Rajasthan and Gujarat, where rainfall is scanty, have used rooftop rainwater harvesting systems to store drinking water. Process of rooftop rainwater harvesting is given below
NOTE : Rainwater Harvesting in Shillong: It is the most common practice in Shillong, Meghalaya. It is interesting because Cherapunjee and Mawsynram situated at a distance of 55 km from Shillong and receive the highest rainfall in the world, yet the State Capital Shillong faces acute shortage of water. Nearly every household in the city has a rooftop rainwater harvesting structure. Nearly 15-25 per cent of the total water requirement of the household comes from rooftop water harvesting. Rainwater that falls on the sloping roofs of houses is taken through a pipe into an underground tanka ( Circular Hole in The Ground )
3. Tankas or Tanks. The Tanks in Semi-arid and arid regions of Rajasthan, particularly in Bikaner, Phalodi and Barmer can store rain water that is locally called Palar Pani. Here they have used underground tanks (called tankas) for water storage. The process is similar to rooftop rainwater harvesting system. The tanks could be as large as a big room; one household in Phalodi had a tank that was 6.1 metres deep, 4.27 metres long and 2.44 metres wide
4. Inundation channels: In the flood plains of Bengal, people developed inundation channels (is a channel that is connected to a large river so that the flood water in the river flows in it) to irrigate their fields.
5. Guls or Kuls: In hilly and mountain regions, people built diversion channels to collect rainwater, spring water and store in circular tanks like the ‘guls’ or ‘kuls’. For example, Western Himalayan i.e. Himachal Pradesh for agriculture.
6. Bamboo drip irrigation system: This system for irrigation is in use for 200 years in Meghalaya. It is old system of utilising stream and spring water by using bamboo pipes. Spring water from the hill slopes, flows into the bamboo pipes which is then transported to distant places through the same pipes.
Advantages of Rainwater Harvesting :
Now-a-days, perennial Rajasthan canal supplies plenty of water in the Western Rajasthan and consequently the practice of rooftop rainwater harvesting is declining. In many parts of rural and urban India, rainwater harvesting successfully adapted to store and conserve rainwater. One such example is a remote village in Mysore, Karnataka named Gendathur that has installed about 200 rooftop rain harvesting systems. Gendathur receives an annual precipitation of 1000 mm and with 80 per cent of collection efficiency and of about 10 fillings; every house can collect and use about 50000 litres of water annually. From the 20 houses, the net amount of rainwater harvested annually amounts to 100000 litres.
Note: Tamil Nadu is the first and the only state in India which has made rooftop rainwater harvesting structure compulsory to all the houses across the state and punish the defaulters.
Which of the following structures are knows as 'tankas'? | |||
| Right Option : A | |||
| View Explanation |
Students / Parents Reviews [20]
Usually we see institutes offering objective based learning which usually causes a lag behind in subjective examinations which is the pattern followed by schools. I think it is really a work of planning to make us students grab the advantages of modes of examination, Objective Subjective and Onli...
Anika Saxena
8thMy experience with Abhyas academy is very nice or it can be said wonderful. I have been studying here from seven class. I have been completing my journey of three years. I am tinking that I should join Abhyas Academy in tenth class as I am seeing much improvement in Maths and English
Hridey Preet
9thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thMy experience was very good with Abhyas academy. I am studying here from 6th class and I am satisfied by its results in my life. I improved a lot here ahead of school syllabus.
Ayan Ghosh
8thMy experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
Upmanyu Sharma
7thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
Aman Kumar Shrivastava
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
Shreya Shrivastava
8thAbhyas academy is great place to learn. I have learnt a lot here they have finished my fear of not answering.It has created a habit of self studying in me.The teachers here are very supportive and helpful. Earlier my maths and science was good but now it has been much better than before.
Barkha Arora
10thThe experience was nice. I studied here for three years and saw a tremendous change in myself. I started liking subjects like English and SST which earlier I ran from. Extra knowledge gave me confidence to overcome competitive exams. One of the best institutes for secondary education.
Aman Kumar Shrivastava
10thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
8thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thWe started with lot of hope that Abhyas will help in better understnding of complex topics of highers classes. we are not disappointed with the progress our child has made after attending Abhyas. Though need to mention that we expected a lot more. On a scale of 1-10, we would give may be 7.
Manya
8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
10thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thWhen I have not joined Abhyas Academy, my skills of solving maths problems were not clear. But, after joining it, my skills have been developed and my concepts of science and SST are very well. I also came to know about other subjects such as vedic maths and reasoning.
Sharandeep Singh
7thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
