Chapter 3 Drainage Flashcards
(6 cards)
What is a water divide?
A line that seprates two neighbouring drainage basins.
Origin of indus and Ganga.
Indus - tibet near mansarovar lake.
Ganga - gangotri glacier in Uttarakhand.
Why brahmaputra in tibetan part have less silt, despite longer course?
Brahmaputra (tsango in tibet) carries less silt because of Tibet is a cold and dry area.
Why are rivers important for the country’s economy?
1 they help develop tourism.
2 river water is used for agricultural, domestic industrial purposes.
3 river water is used for running hyrdo electric dams.
4 the water we drink comes from the rivers.
Himalayan and peninsular river difference.
Himalayan - originate from the himalayas.
Perennial rivers.
They receive water from rain and melted snow from mountain.
Peninsular - 1 originate from western ghats.
2 seasonal rivers.
3 these rivers are dependent on rains.
Main causes of pollution in Indian rivers. And how to prevent it.
Main causes - 1 the growing demand for domestic industrial for water naturally effects water quality.
2 heavy loads of untreated sewage is emptied into rivers.
3 this affects not only the quality but the self cleaning capacity of water.
4 increased urbanisation and industrialisation.
Prevention - 1 sewage and industrial effluents should be treated before they enter the rivers.
2 common people should be made aware about pollution levels of rivers.
3 Indians are religious minded, most of their festivals involve religious items being emptied into rivers. This needs to be checked and controlled.
