Why the groundwater potential in the Northern Western and Peninsular regions of India is lesse...........

Geography Physiography of India

Why the groundwater potential in the Northern,Western and Peninsular regions of India is lesser as compared to valleys and other lower lying areas?

1)The mountainous and hilly regions in the north and west do not allow adequate infiltration of groundwater.

2)The underlying geology limits the formation of large continuous aquifers in the peninsular part of the country.

Which of the above is/are correct?

1 only

2 only

Both 1 and 2

None

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Explanation:

The presence and availability of groundwater varies gratly with changes in topography ,subsurface geology and the prevailing climate in the region. In some areas , groundwater exists in deep aquifers while in others the water is stored near the surface.The location of the aquifer also affects its recharge rate and its susceptibility to pollution and overuse.

Statement 1:- In general ,the mountainous and hilly regions in the north and west do not allow adequate infiltration and thus formation of aquifers is very limited and potential is less. As a consequence ,groundwater is mostly limited to valleys and other lower lying areas. So,1 is correct.

Statement 2 :- Almost the entire peninsular region is covered by a variety of hardrock and fissure formations. So,the aquifers are discontinuous and as a result the yield is very limited.

If the rock formation is porous ,formation of large aquifers is possible and yield will be high.