A topographically delineated area
drained by a river system with a
single outlet.
Watershed
A land area drained by a stream or
fixed body of water and its
tributaries having a common outlet
for surface run-off.
Watershed
Each watershed is separated from adjacent watersheds by a topographic boundary or
barrier such as a ridge, hill or mountain, known as _____
Divide
a geologic divide that partitions water penetrating the ground
surface
Phreatic divide
For practical reasons watershed boundary refers to _____
Topographic divide
A watershed is made up of many smaller watersheds called
_____
Subwatershed
Watershed with area 1,000
ha to 10,000 ha
Small Watershed
Watershed has area
10,000 ha to 50,000 ha
Medium Watershed
Watershed
50,000 ha to 100,000 ha
Large Watershed
Watersheds with area >100,000 ha
River Basins
Largest watershed in the Philippines with almost 3M ha in area
Cagayan River Basin
T or F
More than 90% of total land area of the Philippines are watersheds
True
Province of _____ is the first province
that adopted watersheds as unit for preparing
CLUPs and Provincial Physical Framework Plan
Lanao del Norte
Primary tasks of a watershed manager is to maximize amount of rainwater _____.
stored underground
_____ refers to all water accumulating on
the ground surface i.e., rivers, lakes.
Surface water
_____ refers to water stored below ground
surface.
Groundwater
