what is drainage system?

Answer Posted / k.swaminathan

It is artificial system of outflow to discharge the waste
water & unnecesarry refuse from perticular residential or
working place. To carry raw water or waste water to give
sufficent gravity to flow water. In industrial and
residential areas, a drainage system is a
facility to dispose of liquid waste.
(For imp. Knowledge)
Sustainable Drainage Systems (SuDS), sometimes known as
Sustainable Urban Drainage Systems (SUDS)[1], are designed
to reduce the potential In industrial and residential
areas, a drainage system is a facility to dispose of liquid
waste.(For imp. Knowledge)Sustainable Drainage Systems
(SuDS), sometimes known as Sustainable Urban Drainage
Systems (SUDS)[1], are designed to reduce the potential in
industrial and residential areas, a drainage system is a
facility to dispose of liquid waste.
(For imp. Knowledge)
Sustainable Drainage Systems (SuDS), sometimes known as
Sustainable Urban Drainage Systems (SUDS)[1], are designed
to reduce the potential attractive. Examples of this type
of system are reed beds and other wetland habitats that
collect, store, and filter
dirty water along with providing a habitat for wildlife.
THE WORD DRAINAGE DESCRIBES THE AREA OF RIVERS IS KNOWN as
drainage.The term drainage describes the river system of an
area.Many agricultural soils need drainage to improve
production or to manage water supplies.
some examples are:
1. Dendritic drainage system
Dendritic drainage systems (from Greek δενδρίτης,
dendrites, "of or pertaining to a tree") are the most
common form of drainage system. In a dendritic system,
there are many contributing streams (analogous to the twigs
of a tree), which are then joined together into the
tributaries of the main river (the branches and the trunk
of the tree, respectively). They develop where the river
channel follows the slope of the terrain. Dendritic systems
form in V-shaped valleys; as a result, the rock types must
be impervious and non-porous.[2]
Trellis drainage system
The geometry of a trellis drainage system is similar to
that of a common garden trellis used to grow vines. As the
river flows along a strike valley, smaller tributaries feed
into it from the steep slopes on the sides of mountains.
These tributaries enter the main river at approximately 90
degree angles, causing a trellis-like appearance of the
drainage system. Trellis drainage is characteristic of
folded mountains, such as the Appalachian Mountains in
North America.[3]
Rectangular drainage system
Rectangular drainage develops on rocks that are of
approximately uniform resistance to erosion, but which have
two directions of jointing at approximately right angles.
The joints are usually less resistant to erosion than the
bulk rock so erosion tends to preferentially open the
joints and streams eventually develop along the joints. The
result is a stream system in which streams consist mainly
of straight line segments with right angle bends, and
tributaries join larger streams at right angles.[3]

Radial drainage system

In a radial drainage system the streams radiate outwards
from a central high point. Volcanos usually display
excellent radial drainage. Other geological features on
which radial drainage commonly develops are domes and
laccoliths. On these features the drainage may exhibit a
combination of radial and annular patterns.[3]


2. meander
  miˈæn dərShow Spelled[mee-an-der] Show IPA
–verb (used without object)
1.
to proceed by or take a winding or indirect course: The
stream meandered through the valley.
2.
o wander aimlessly; ramble: The talk meandered on.





3. delta
A usually triangular mass of sediment, especially silt and
sand, deposited at the mouth of a river. Deltas form when a
river flows into a body of standing water, such as a sea or
lake, and deposits large quantities of sediment. They are
usually crossed by numerous streams and channels and have
exposed as well as submerged areas.

4. Lagoon 1
Definition: A shallow sound, channel, pond, or lake,
especially one into which the sea flows; as, the lagoons of
Venice.
Lagoon 2
Definition: A lake in a coral island, often occupying a
large portion of its area, and usually communicating with
the sea. See Atoll.
lagoon 3
Definition: a body of water cut off from a larger body by a
reef of sand or coral


5. Dadur
In India, a wind blowing down the Ganges Valley from the
Siwalik hills at Hardwar.

6. rift valley
A valley that has developed along a rift, especially one
bounded by normal faults in an area of lithospheric
thinning.
7. Basin
A drainage basin is an extent or an area of land where
surface water from rain and melting snow or ice converges
to a single point, usually the exit of the basin, where the
waters join another waterbody, such as a river, lake,
reservoir, estuary, wetland, sea, or ocean. In closed
drainage basins the water converges to a single point
inside the basin, known as a sink, which may be a permanent
lake, dry lake, or a point where surface water is lost
underground.[1] The drainage basin includes both the
streams and rivers that convey the water as well as the
land surfaces from which water drains into those channels,
and is separated from adjacent basins by a drainage divide.
[2]



8. glacier
A huge mass of ice slowly flowing over a land mass, formed
from compacted snow in an area where snow accumulation
exceeds melting and sublimation




9. Drainage divide
A drainage divide, water divide, divide or (outside North
America) watershed is the line separating neighbouring
drainage basins (catchments). In hilly country, the divide
lies along topographical peaks and ridges, and may be in
the form of a single range of hills or mountains (known as
a Dividing range), but in flat country (especially where
the ground is marshy) the divide may be invisible – just a
more or less notional line on the ground on either side of
which falling raindrops will start a journey to different
rivers, and even to different sides of a region or
continent.
Drainage divides are important geographical, and often also
political boundaries. Roads (such as ridgeways) and rail
tracks often follow divides to minimise grades (gradients),
and to avoid marshes and rivers.


10. The loop which is formed by ox bun lake

What Is An Oxbow Lake?
An oxbow is a crescent-shaped lake lying alongside a
winding river. The oxbow lake is created over time as
erosion and deposits of soil change the river's course. You
can see how an oxbow lake takes shape below:

(1) On the inside of the loop, the river travels more
slowly leading to deposition of silt.


(2) Meanwhile water on the outside edges tends to flow
faster, which erodes the banks making the meander even
wider.


(3) Over time the loop of the meander widens until the neck
vanishes altogether.

(4) Then the meander is removed from the river's current
and the horseshoe shaped oxbow lake is formed.


Without a current to move the water along, sediment builds
up along the banks and fills in the lake.

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