Why Depositional Landforms Occur Along the Course of A River
Rivers have three courses. The course is the journey the river makes
to reach the sea. Rivers never have a straight course from source to
mouth. Their course is always irregular. Along this course
depositional landforms can occur. Landforms can be formed from the
deposition of weathered and eroded surface materials. On occasion,
these deposits can be compressed, altered by pressure, heat and
chemical processes to become sedimentary rocks.
This includes landforms with some of the following geomorphic
features: beaches, deltas, floodplains, and glacial moraines. The
upper course is found in the mountains and hills where the river rises
from its source and often waterfalls and rapids are also found in this
course. The river is usually fast flowing in the upper course; also
there are lots of stones and boulders for the water to flow over.
Furthermore, the river starts as astream in the upper course and flows
through valleys. The middle course, however, is where the river starts
to become wider and deeper. The land, which the river flows over, is
becoming flatter and this is where the river starts to meander or bend
in the middle course. The lower course is where the river becomes its
widest and deepest. This course is found closest to the sea where the
river has its mouth. The flat area of land by the riverbanks is known
as a floodplain. Sometimes a river can also have an estuary or a delta
as its mouth. This is due to the following.
Rivers and its landforms are formed and moulded over time chiefly by
the processes of erosion, and by the transport and deposition of
sedim...
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... crescent shaped lakes formed in an
abandoned meander river bend by a meander cutoff. Oxbow lakes are
lakes or ponds found in association with river channels. When a river
channel becomes obstructed by silt and debris, the river will often
cut a new channel around the obstruction. With time the obstructed
area may become completely cut off from the river and begin developing
as a lake. Over time an oxbow lake may become filled with organic
material and be transformed into a marsh.
In conclusion hydraulic variables and physical variables
(relief/climate) aid the development of depositional landforms along a
river. The more turbulent a river is, the more it will occur. The
turbulence differentiates through the three courses; upper, middle and
lower. This results in different landforms occurring at different
stages.
A flood is a large amount of water that covers an area that is normally dry. Floods can occur almost anywhere, but they happen more often on floodplains and on places close to the ocean. The land that floods regularly is called a floodplain. It is called coastal flooding when a large storm or wave from the ocean causes flooding in the cities inland. Some floods take days to develop, while others take minutes to form these are called flash floods.
A major flood on any river is both a long-term and a short-term event, particularly any river basin where human influence has exerted "control" over the ri...
affects the ecosystem. The land's incline prevents some areas to receive and maintain a water
Our society takes things for granted that the ancient civilizations originally invented. In southwestern Asia around 3500 B.C. the first River Valley Civilizations began. These early civilizations invented many things. The early River Valley Civilizations of Mesopotamia made key contributions to future societies. Two contributions from the Mesopotamian Civilization were the invention of cuneiform and Hammurabi’s Code.
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Landforms that are Produced as a Result of Costal Deposition Deposition is defined as 'the laying down of sediments, produced by weathering and erosion of landmasses…'. Deposition occurs when velocity decreases and therefore suspended sediment can no longer be transported. There are four main landforms that are resulting form landforms, beaches, spits and tombolos, forelands and barrier islands. The area that I have studied is the Vale of Glamorgan Coastline form Merthyr Mawr Warren to Breaksea Point and within this area there are many depositional features. Most of the rock in the area was formed during the Jurassic period approximately 150 million years ago.
which can be used as a river, and also attracts people as it can be
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in a habitat, changes in climate, the development or destruction of a mountain range, river
the the change in sea level is due to a change in the level of land
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