Deposition

    Cards (12)

    • 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.