IAS Prelims 2017 Important topics on Current Affairs: Rain Water Harvesting

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IAS Prelims 2017 Important topics on Current Affairs: Rain Water Harvesting

IAS Prelims 2017 Important Topics on Current Affairs: The Union Public Service Commission (UPSC) will conduct the civil services (CS) preliminary examination on June 18 this year. It is one of the most esteemed and toughest exams in the country. With a success rate of 0.1- 0.3 percent of the total percentage of candidates who apply, it is really difficult to nail the examination.

As you know, On 28th March 2017, we have shared IAS Prelims 2017 Important Topics on current affairs which will help you prepare for your upcoming examination. Here is the topic that we have discussed yesterday, Click on the link below to explore

IAS Prelims 2017 Important topics on Current Affairs: Coastal Erosion

As promised, today we are going to continue with the twenty second topic i.e Rain Water Harvesting. Let us provide you the brief explanation of the said topic.

 

IAS Prelims 2017 Important Topics on Current Affairs:  Rain Water Harvesting

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Let us provide you the explanation of the given topic.

Rain Water Harvesting

Rainwater Harvesting is a process involving collection and storage of rain water (with the help of artificially designed system) that runs off natural or man-made catchment areas e.g. roof top, compounds, rock surface or hill slopes or artificially repaired impervious/semi-pervious land surface.

Advantages:

  1. The cost of recharge to sub-surface reservoir is lower than surface reservoirs.
  2. The aquifer serves as a distribution system also.
  3. No land is wasted for storage purpose and no population displacement is involved.
  4. Ground water is not directly exposed to evaporation and pollution.
  5. Storing water under ground is environment friendly.
  6. It increases the productivity of aquifer.
  7. It reduces flood hazards.
  8. Effects rise in ground water levels.
  9. Mitigates effects of drought.
  10. Reduces soil erosion.

Rain Water Harvesting Techniques:

There are two main techniques of rain water harvesting.

  1. Storage of rainwater on surface for future use.
  2. Recharge to ground water.

Urban Areas:

Roof top rain water/storm runoff harvesting through:

(i) Recharge Pit

(ii) Recharge Trench

(iii) Tubewell

(iv) Recharge Well

Rural Areas:

Rain water harvesting through:

(i) Gully Plug

(ii) Contour Bund

(iii) Dugwell Recharge

(iv) Percolation Tank

(v) Check Dam/Cement Plug/Nala Bund

(vi) Recharge Shaft

Examples of Traditional water harvesting system in India

– Trans-Himalayan Region

  • Zing -Tanks for collecting water from melted ice in Ladakh.

– Western Himalayas

  • Kul -Water channels in mountain areas Jammu, Himachal Pradesh.
  • Naula -Small ponds in Uttaranchal.

– Eastern Himalayas

  • Apatani -Terraced plots connected by inlet and outlet channels in Arunachal Pradesh.

– Northeastern Hill Ranges

  • Zabo -Impounding runoff in Nagaland
  • Bamboo drip irrigation – Water from streams in the hills is brought to the plains via bamboo pipes for drip irrigation in Meghalaya

– Brahmaputra Valley

  • Dongs -Ponds in Assam

– Indo-Gangetic Plain

  • Dighis -Small square or circular reservoir fed by canals from rivers in Delhi

– Thar Desert

  • Baoris / bers -Community wells in Rajasthan

Over here we conclude our article on IAS Prelims 2017 Important Topics on Current Affairs. Stay tuned with us for the rest of the topic that we will discuss day by day. 

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