Tuesday, March 8, 2011

L3 MCGE

Explain the process of Longshore Drift in the MCGE and identify natural features that can be created/modified from this process.

14 comments:

Unknown said...

Long shore drift is the transporting process of sediment from one place to another, and they are the reason for the popularity of Motutara Island, otakamiro point and Maori Bay, the caves and the blow holes. Long shore drift causes erosion and that is how all these natural features occur.

Ibanez said...

The process of Longshore Dirft has five main steps:

1. the wind blows from the SW direction 58% of the time at Muriwai.

2. The wind sets up wave trains that approach the beach from an oblique angle.

3. Swash moves up on to the beach from a SW direction.

4. Backwash receeds straight (i.e westwards) due to the gravity. Thus setting up a zig-zag pattern of swash and backwash up to the beach.

5. Sediment carried in the swash and backwash moves in a northerly direction towards South Kaipara Head.

tatai said...
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Solomon said...

The process of the longshore drift starts from the sediment that comes from fluvial erosionsof the landmasses(over 90%) the wave transport from the sea floor and the (titanomagnetite), then sediment is transported from Mount taranaki to North Cape, the transportation is then takenfrom Taranaki whereas winds build strong waves which travels 6m/sec, as waves move in an oblique angle carrying the sediment. The current then travels upward until it approaches the coast and deposits the sediment onto muriwai beach building the beaches.

tatai said...

Longshore drift is the process in which sediment is transported(generally sand but may also consist of coarser sediments such as gravels) along a coast at an angle to the shoreline. it is really dependents on prevailing winds, swash and backwash. The process is also known as longshore transport, littoral drift and LSD.

Unknown said...

Longshore Drift is when sediment or also known as titanmangnetite (iron sand) from Mt Taranaki is washed in the Tasman Sea and is transported northward and deposited on beaches like Muriwai Beach. Longshore drift happens where the waves break. Natural features that can be created from this process is Muriwai Beach.

Samantha said...

Long shore drift is the process of transporting sediment from Mt Taranaki northward on Muriwai beach. Long shore Drift is responsible for the supply of Titanmagnetite, it originates from Mt Taranaki and the central volcanoes. It operates in the breaker zone, meaning where waves break in shallow waters. As the process of Long shore drift occurs it creates natural features such as the Muriwai Beach.

Polly said...

Longshore drift transports sediment northward on Muriwai Beach. Results: Formation of s sand spit called Kaipara Peninsula. LSD is responsible for the supply of titanmagnetite (iron sand). It is originally washed into the Tasman Sea by rivers originating from Mt Taranaki and the central volcanoes. LSD has transported it north. LSD operates as a process in the breaker zone i.e. where waves break in shallow water. Waves rarely approach the coastline at right angles. Each wave train strikes Muriwai beach in the south first and then the wave breaks in a northerly direction. When wave approach the coast at an oblique angle, a Longshore or littoral current is created. The current transports material along a beach in a down drift direction known as LSD. Swash runs up the beach face at an angle due to oblique wave approach because the prevailing wind is SW. backwash runs perpendicular down the beach face due to gravity. A zig zag movement of sediment results. As high tide rises and falls the swash and backwash transports a very large amount of sediment northward every year.

Imelda said...

Explain the process of Longshore Drift in the MCGE and identify natural features that can be created/modified from this process.

The process of Longshore Drift in the Muriwai Coastal Georgaphic Environment is transported from Mnt Taranaki to Muriwai Beach, therefore resulted in formation of a sand spit called Kaipara Peninsula. Longshore drift is resposible for the supply of titanmagnetite(ironsand). it's originally washed into the Tasman Sea by rivers originating from Mnt Taranaki and the central volcanoes.

Unknown said...

Longshore drift is the process of sediment being transported from Mount Taranaki to Muriwai beach which is located on the west coast of Auckland city. The longshore drift is responsible for the supply of titanmagnetite (iron sand). First it washes into the Tasman Sea by rivers orginating from Mount Taranaki and the central volcanoes. LSD has transported it north. Most of the sediment comes from fluvial erosion of the landmasses.

The wind sets up wave trains that approach the beach from an oblique angle. The wave trains hits Muriwai Beach in the south first and then the wave breaks in a northerly direction. This current transport material along a beach in a down drift direction known as Longshore drift.

Swash moves up the beach face at an oblique angle from a SW direction.

Unknown said...

Long Shore Drift?
What can i say??
Long shore drift has 5 main steps.LSD is a tranporting system used to carry sediment to and from the beach. Wind carries sediment from Mount Ruapehu as well as Mount Taranaki to the coasts of Muriwai beach. Once the sediments has dried out the wind then carries sedments to the diffrent parts of the Muriwai coastal inviroment. The Backshore carries a few of these sediments which then gets picked up and blown on the Beach.

Unknown said...
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Unknown said...

The process of Long shore drift that occurs at Muriwai has five main steps:

1. The wind Blows from SW Direction 58% of the time at Muriwai.

2. The wind sets up Wave trains that approach the beach from an obliques angle.

3. Swash moves up on to the beach from SW direction.

4. Back wash recceds straight (i.e Westwards) due to the Gravity. Thus setting up a zig-zag pattern of swash and backwash up to the beach.

5. Sediment carried in the swash and backwash moves in a northerly direction towards south Kaipara head.

puiipuii said...

The Long shore drift process:
1. Wind blows from the SW 58% of the time at Muriwai .
2. The wind sets up wave trains that approach the beach from an oblique angle.
3. Swash moves up onto the beach from a SW direction.
4. Backwash receeds straight (i.e westward) due to gravity. Thus sitting up a zig-zag pattern of swash and backswah up the beach.
5. Sediment carried in te swah and backswah moves in a northernly direction towards south kaipara head.

Headland:
Depostion of material occurs at one side of the headland to the other side , due to waves refracting around Otakamiro point to the Headland.