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प्रश्न
It is important to make small check dams across the flooded gullies because they
- hold water for irrigation
- hold water and prevent soil erosion
- recharge ground water
- hold water permanently
विकल्प
(i) and (iv)
(ii) and (iii)
(iii) and (iv)
(ii) and (iv)
उत्तर
(ii) and (iii)
Explanation -
Small check dams are made across the flooded gullies to hold water, prevent soil erosion and recharge ground water.
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संबंधित प्रश्न
The construction of large dams leads to social and environmental problems. List two problems of each category.
What is watershed management system ?
Is water conservation necessary? Give reasons.
Describe some of the problems associated with the construction of dams.
The main reason for the abundant coliform bacteria in the water of river Ganga is :
(a) immersion of ashes of the dead into the river
(b) washing of clothes on the banks of river
(c) discharge of industrial wastes into river water
(d) disposal of unburnt corpses into river water
Answer the following question.
Write two causes for the failure of sustained availability of groundwater.
‘Kulhs’ the ancient water harvesting structure were made in ______
Which one is not an example of groundwater?
Match the following:
| Secondary Treatment | Disinfection |
| Grey water | Floatation |
| Primary Treatment | Reusable wastewater |
| Tertiary Treatment | Sedimentation |
Point out the importance of water conservation.
