The tract of land drained by a river and its tributaries
Drainage area
River area
Drainage Basin
None of this
The river having water throught the year
Dry river
Perennial river
non perennial river
Seasonal 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
Precipitation, surface run off and ground water are the sources of
Saline water
Fresh water
Impure water
Pure water
River having water only in particular season
unseasonal river
The first multi-purpose project of India
Sivasamudram
Damodar Valley
Hirakud
Bhakra Nangal
'The universal solvent'.
Water
Land
Soil
Forest
Rainwater harvesting system in mountainous regions is known as
Guls
Tankas
Johads
Baolis
The objectives of rain-water harvesting
To reduce surface run off
To recharge the water table
To avoid flooding of roads
All of these
Catchment dams particularly in water deficiet areas
Check Dam
Dam
Watershed
Water Stress
