Muriwai
Muriwai is located on the west coast of the north island New zealand and is approximately 40km from Auckland city, The two natural processes i am going to talk about that interact are long shore drift and Aeolian transportation and deposition.
Long shore drift is a process where sediment is moved along a beach by the action of waves.When the waves approach a beach, the base of the waves drags along the sea bed picking up sediment and causing the wave to break, the wave then swashes up onto the beach face carrying sediment with it. Gradually the build up of sediment pushes the sediment up the beach which it is then able to dry out to become light enough to be deposited further up the beach. The sediment found at south muriwai beach is made up of three types, Silica,quarts and titanomagnetite, Silica and quarts are lighter grains with a lighter colour where as titanomagnetite is a dark black colour and a heavier grain. At south muriwai beach silica and quarts are found on the top layers of the beaches sand, this means that the process of Aeolian deposition is able to take place. Due to this changes to the environment have been able to take place, such as the formation of the sand dunes located on south muriwai beach as shown on my map. On south Muriwai Beach there are sand dunes, Larger sand dunes and smaller sand dunes that stretch across majority of the beaches length. These sand dunes are a result of the processes long shore drift and Aeoilian transportation and deposition interacting. As Long shore drift takes place, the build up of sediment is able to dry out and become much lighter so that the process of Aeolian transportation and deposition can occur. Long shore drift and Aeolian processes interact by allowing the sand granules to be lifted in the air and transported further up the beach, this is the sub process of suspension. At south Muriwai beach data shows that the wind speeds exceed up to 16km/h 42’ of the time, which are prime conditions for aeolian
Long shore drift is a process where sediment is moved along a beach by the action of waves.When the waves approach a beach, the base of the waves drags along the sea bed picking up sediment and causing the wave to break, the wave then swashes up onto the beach face carrying sediment with it. Gradually the build up of sediment pushes the sediment up the beach which it is then able to dry out to become light enough to be deposited further up the beach. The sediment found at south muriwai beach is made up of three types, Silica,quarts and titanomagnetite, Silica and quarts are lighter grains with a lighter colour where as titanomagnetite is a dark black colour and a heavier grain. At south muriwai beach silica and quarts are found on the top layers of the beaches sand, this means that the process of Aeolian deposition is able to take place. Due to this changes to the environment have been able to take place, such as the formation of the sand dunes located on south muriwai beach as shown on my map. On south Muriwai Beach there are sand dunes, Larger sand dunes and smaller sand dunes that stretch across majority of the beaches length. These sand dunes are a result of the processes long shore drift and Aeoilian transportation and deposition interacting. As Long shore drift takes place, the build up of sediment is able to dry out and become much lighter so that the process of Aeolian transportation and deposition can occur. Long shore drift and Aeolian processes interact by allowing the sand granules to be lifted in the air and transported further up the beach, this is the sub process of suspension. At south Muriwai beach data shows that the wind speeds exceed up to 16km/h 42’ of the time, which are prime conditions for aeolian