Skip to main content

Types of Sea Level Changes

Sea level change is relative change in level of the sea surface that rise or fall with respect to the land surface.
There are two types-
A.)Sea Level Rise.
B.)Sea Level Fall.
A.)Sea Level Rise:
Sea level rising while the land surface subsides, remains stationary or rises at a slower rate.
 Characteristics:
  1. Due to the rise of sea water, the various rivers are flooded.
  2. As a result of rise in sea level, almost 33 % of the world’s crop lands could be submerged.
  3. As a result of rise in sea level, the mouths of drainage basins will undergo submergence.
  4. As a result of rise in sea level, beaches, coastal dune & bars will be destroys.
B.)Sea Level Fall:
Sea level falling while land surface rises, remains stationary or subsides at slow rate.
Characteristics:
  1. A fall in sea level may cause changes in the base levels of rivers.
  2. As a result of fall in sea level, deposited of substances produced by various corrosive processes.
  3. Sea level falling greatly regulates the spread of coral reefs.
  4. Water fall is one of the reasons for river’s regeneration.

Fig: Sea Level Change

Labels:

Comments

Post a Comment

Popular posts from this blog

Behaviouralism in geography

Behaviouralism Behaviouralism is an approach in human geography that came to prominence in the human geography of the 1960s and 1970s. It goes out of the idea that people are the determining factor in the explanation of space. Behaviouralism tries to give an explanation of the spatiallity of human activities. And thereby they use a complex universally applicable model.  Definition of Behaviouralism: The particular aspect with which geographical content is analyzed using mathematical statistics & human sensitivity, is called behavioralism. Concept of Behaviouralism: The Behaviouralism revolution is a theoretical concept. Its theories are not based on assumptions, but are actually explored through ascending methods based on the experience of human behavior. An analysis of the significance of geographical issues in behavioral perspectives within a system, so therefore is no definite boundary to behavioral geography. The main purpose of behaviouralism geography is to invest
Post a Comment
Read more

Deep-Ocean Basin

Abyssal Plain:  Abyssal plains is an underwater plain on the deep ocean floor, usually found at depths between 3000 metres & 6000 metres. Characteristics: a)       Abyssal plain is the most extensive relief zone of the ocean floor. b)      The average slope gradient is almost 0.5ᵒ. c)       It covers nearly 40% of the ocean floor. d)      It is flat & rolling submarine plain. Abyssal Hill:  Abyssal hills a small hill that rises from the floor of an abyssal plain. Characteristics: a)       Covering more than 30% of the ocean floor. b)      Height of this hill is less than 100m. Seamounts: Seamounts is an volcanic projections that developed above the abyssal plains that do not rise above the surface of the sea. Characteristics: a)       Seamounts are circular or elliptical. b)      Height is of less than 1 km. c)       Relatively steel slops of 20ᵒ-25ᵒ. d)      Seamounts may be found alone or in groups of from 10 to 100. Guyots:  Guyots are
Post a Comment
Read more

Positive and Negative Impact of Tide

Tide has many effects on human life. The impact of tide discuss below- Positive Impact of Tide: Shipping:  Tides are helpful in making rivers navigable for large vessels. During the high tide, the amount of river water & height of river water increases. At that time, large vessels/ships can easily come to rive port. Again, during the low tide, ships can be returned from port to sea.  For example - London & Kolkata have become important ports because of the tidal waves in the Thames & the Hooghly rivers respectively. Pollution-free Environment:  When tidal water flows, rivers are free of garbage. As a result, the environment is not pollutant near the river areas. Obstruction of Sediments deposited & Delta Formation:  As a result of the tide, sediments not to deposited & prevents delta formation.  For example-  In the Sundarbans, small creeks are capable of navigating during tides.  Regular Water flow:  During the tide, sea salt water enters the river
Post a Comment
Read more