CBSE Geography Class 10 Water Resources HOTS
Q.1. Write the features of the â€˜tankas’ built in the houses of Bikaner, Phalodi and Banner. [CBSE 2013]
Ans. (i) The tanks could be as large as a big room;
one household in Phalodi had a tank that was 6.1 meters deep, 4.27 meters long and 2.44 meters wide.
(ii) The tankas were part of the well-developed rooftop rainwater harvesting system and were built inside the main house or the courtyard.
(iii) They were connected to the sloping roofs of the houses through a pipe.
(itv) Rain falling on the rooftops would travel down the pipe and was stored in these underground tankas.
(v) The first spell of rain was usually not collected as this would clean the roofs and the pipes. The rainwater from the subsequent showers was then collected.
Q.2. Explain the term â€˜tankas’. Where were tankas built in India ? [CBSE 2013]
Ans. (i) The tankas were part of the well-developed rooftop rainwater harvesting system and were built inside the main house or the courtyard. They are built for storing drinking water. A tank could be 6.1 meters deep, 4.27 meters long and 2.44 meters wide.
(ii) The tankas were built in the semi-arid and arid regions of Rajasthan, particularly in Bikaner, Phalodi and Barmer.
Q.3. What is bamboo drip irrigation ? Mention any two features of it. [CBSE 2012]
Ans. (1) (i) About 18-20 liters of water enters the bamboo pipe system, get transported over hundreds of meters and finally reduces to 20-80 drops per minute at the site of the plant.
(ii) Bamboo drip irrigation system is practiced in Meghalaya.
(2) Features of bamboo drip irrigation ;
(i) Bamboo drip irrigation system is 200 year old system of tapping stream and stripwater by using bamboo pipe.
(ii) Bamboo pipes are used to divert perennial springs on the hilltops to the lower reaches by gravity.
(iii) The channel sections, made of bamboo, divert water to the plant site where it is distributed into branches.
Q.4. What role do “Guls”or “Kuls”of the Western Himalayas and “Khadin”and “Johads”in parts of Rajasthan play ? Describe. [CBSE 2012]
Ans. (i) In Western Himalayas people build diversion channels like â€˜guls’ or â€˜kuls’.
(ii) In arid and semi-arid regions, agricultural fields were converted into rain-fed storage structures.
(iii) These allowed the water to stand and moisten the soil like the â€˜Khadins’ in Jaisalmer and â€˜Johads’ in other parts of Rajasthan.