Deposition

• Lower Course Deposition


  Dominant process
• Deposition of material/sediment


  1. When there's too much sediment to carry in the river

  2. When the river runs out of energy

  3. When volume of the river decreases
• Where deposition occurs


  • On inner bend of a meander
• River volume decreases


  1. During a dry season

  2. In a dry region with high evaporation rates

  3. Presence of permeable rocks

  4. After a dam or flood relief channels are built

  5. Receding flood waters
• River speed decreases


  1. When it enters a lake (could be man made e.g. a dam)

  2. When it enters a calm sea

  3. When it has a lot of meanders

  4. When it enters a gently sloping plain
• Bar


  A ridge of sediment, usually sand or gravel, deposited in the middle or along the banks of a river
• Braided stream


  A stream that flows in a network of many interconnected rulers around numerous bars. A stream tends to become braided when it is heavily loaded with sediment and has banks that are easily eroded
• Deposition is the process by which sedimentary rocks are formed from the accumulation of weathered material.
• The three main types of deposition are mechanical, chemical, and organic.
• Mechanical deposition occurs when particles settle out of suspension due to gravity or water currents.
• Sediments can form through various processes such as chemical precipitation, biological activity, and physical transport and deposition.
• The type of sediment produced depends on factors like climate, geology, and topography.