The term “drainage area” is defined as the land area where precipitation falls off into creeks, streams, rivers, lakes, and reservoirs . It is a land feature that can be identified by tracing a line along the highest elevation between two areas on a map, often a ridge.
What is the meaning of drainage area?
Definition: A drainage area is the total surface area, upstream of a point on a stream , where the water from rain, snowmelt, or irrigation which is not absorbed into the ground flows over the ground surface, back into streams, to finally reach that point.
What does river drain mean?
The outlet of a river , sewer, etc. noun. The place where a sewer, drain, or stream discharges.
What is the area drainage by a single river system called?
Complete answer:
The drainage basin is called the region drained by a single river system. Sometimes with drainage basin or catchment, the word watershed is used interchangeably. It represents all of the tributaries of the stream that flow along the stream channel to some location.
How do you calculate drainage area?
To do this, we simply multiply across each row . The runoff, Q, for the roof area in drainage Zone A is: (1.00 x 1.5 x 500) / 96.23 = 7.79 gallons per minute. The runoff for the grass portion of drainage Zone A is: (0.35 x 1.5 x 900) / 96.23 = 4.91 gpm.
What is the border between two drainage basins called?
What is the border between two drainage basins called? Boundary .
What are the 4 types of drainage patterns?
there are 4 types of drainage patterns on the basis of their flowing pattern- dendritic, trellis, radial and rectangular .
What are the three types of drainage patterns?
- Dendritic drainage pattern.
- Parallel drainage pattern.
- Trellis drainage pattern.
- Rectangular drainage pattern.
- Radial drainage pattern.
- Centripetal drainage pattern.
- Deranged drainage pattern.
- Annular drainage pattern.
What is the most common drainage pattern?
A dendritic drainage pattern is the most common form and looks like the branching pattern of tree roots. It develops in regions underlain by homogeneous material. That is, the subsurface geology has a similar resistance to weathering so there is no apparent control over the direction the tributaries take.
What is the place where the river originates called?
Complete answer:
The source is called the location where a river starts. A river’s place of origin is called the river’s source. The beginning of a river is called the young stage or the source, as it flows rapidly with lots of energy.
What is called a river system?
A river system is sometimes called a drainage system . It is the whole natural water system in a drainage basin. ... Water flow in rivers and streams is normally confined to channels which are depressions or scours in the land surface that contain the flow.
What is called watershed?
A watershed is an area of land that drains or “sheds” water into a specific waterbody . Every body of water has a watershed. Watersheds drain rainfall and snowmelt into streams and rivers. These smaller bodies of water flow into larger ones, including lakes, bays, and oceans.
How do you calculate the drainage area of a river?
Drainage areas are determined by tracing all of the water bodies flowing into the stream or river upstream of the proposed site . A divide or ridge surrounds every drainage basin. A divide is defined as “the line of separation or dividing ridge marking the boundary between two drainage systems.”
What is the contributing drainage area?
Contributing drainage area (A) is the most statistically significant explanatory watershed variable and the only explanatory watershed variable that is used in the regression equations. Contributing drainage area is the total area that contributes runoff upstream of the stream site of interest.
What is the minimum slope for water drainage?
For efficient drainage, paved surfaces should have a minimum 1-percent slope . Turf or landscaped areas should have a minimum slope of 2 percent.
What is the difference between catchment area and drainage basin?
“A catchment is an area of land from which water drains into a river. ... Neighbouring catchments are divided by watersheds , and rivers are arranged within catchments in drainage patterns.” A catchment (or drainage basin) is an area where water is collected by the natural landscape.
