Delta
A delta is landform that is created at the mouth of a river. It is where a river or stream meets and flows into a body of water such as an ocean, sea or lake. Delata are formed by the deposition of the sedement, rock particles, that are carried by the river or stream as it flows. Over time the sedement, rock particles build up and creates a delta.
There are 4 types of delta. Deltas are typically classified according to the main control on deposition, which is usually either a river, waves, or tides. These controls have a large effect on the shape of the resulting delta. Below is a breaf description of each.
Wave-dominated delta- this type of delat is controled and shaped by the waves. This type of delta has a triangle shape.
Tide-dominated delta- This typ of delta is controled by a tide. This type of delta creates new dstributaries we there is a lot of water, such as floods or storm surges.
Gilbert delta- This type of delta is formed by coarse sediments. For example, a mountain river depositing sediment into a freshwater lake would form this kind of delta. This formation is more characteristic of the freshwater lakes, where it is easier for the river water to mix with the lakewater.
Island delta- This type of delta is located inside a large valley and is called an inverted river delta. Sometimes a river will divide into multiple branches in an inland area, only to rejoin and continue to the sea; such an area is known as an inland delta, and often occur on former lake beds.
There are 4 types of delta. Deltas are typically classified according to the main control on deposition, which is usually either a river, waves, or tides. These controls have a large effect on the shape of the resulting delta. Below is a breaf description of each.
Wave-dominated delta- this type of delat is controled and shaped by the waves. This type of delta has a triangle shape.
Tide-dominated delta- This typ of delta is controled by a tide. This type of delta creates new dstributaries we there is a lot of water, such as floods or storm surges.
Gilbert delta- This type of delta is formed by coarse sediments. For example, a mountain river depositing sediment into a freshwater lake would form this kind of delta. This formation is more characteristic of the freshwater lakes, where it is easier for the river water to mix with the lakewater.
Island delta- This type of delta is located inside a large valley and is called an inverted river delta. Sometimes a river will divide into multiple branches in an inland area, only to rejoin and continue to the sea; such an area is known as an inland delta, and often occur on former lake beds.