Rycycle of water between hydrosphere,atmosphere and lithosphere
Evaporation
Evapotranspiration
Water cycle
None of this
Rainwater flowing on surface of land
Groundwater
Rinwater
Surfacewater
'The universal solvent'.
Water
Land
Soil
Forest
The objectives of rain-water harvesting
To reduce surface run off
To recharge the water table
To avoid flooding of roads
All of these
Percentage of earth's surface is covered with water
About 2/3
About 3/4
About 1/4
About 1/2
Catchment dams particularly in water deficiet areas
Check Dam
Dam
Watershed
Water Stress
River having water only in particular season
Seasonal river
unseasonal river
Dry river
Perennial river
Two techniques of rooftop rain-water harvesting.
To capture water from roof tops
To capture run-off water from catchment areas
To bring water from far-off regions
To use ground water
The Sardar Sarovar Dam is constructed on
River Krishna
River Mahanadi
River Kaveri
River Narmada
The process of removing dissolved salt from sea water
Electrodialisis
Salination
Desalination
Dehydration
