Examine the role of the process of deposition on the formation of one fluvial landform or one coastal landform or one glacial landform that you have studied. - Leaving Cert Geography - Question 1 - 2021

Deposition is a key process in geomorphology, playing a significant role in shaping various landforms.

In the context of fluvial systems, one notable landform affected by deposition is the delta. Deltas form at the mouth of rivers where they meet a body of water, such as an ocean or lake. The process begins when the river, carrying sediments, slows down upon entering a standing water body. This reduction in velocity leads to the deposition of the sediments, which accumulate over time, forming a delta.

Processes of Deposition:

1. Transport of Sediments: Rivers carry sediments eroded upstream, consisting of clay, silt, and sand.
2. Velocity Decrease: As the river meets a larger body of water, its velocity drops, causing heavier sediments to settle first, followed by lighter particles.
3. Formation of Landforms: The continuous deposition creates a landform that is typically shaped like a triangle or fan.

The role of deposition in the formation of deltas not only shapes the landscape but also creates unique ecosystems and habitats, supporting diverse flora and fauna.