GCSE GEOGRAPHY SWANAGE CASE STUDY

It connects the Isle of Portland to the mainland. Sea wall Concrete sea walls are in place along most of Swanage beach. Its coastline has examples of many erosional and depositional landforms. But, by stopping the movement of beach material along the coast beaches further down the coast are becoming narrower and subject to more erosion due to reduced ability to absorb wave energy. In the winter , sand and shingle were dredged from the sea bed at Poole Harbour and added to the upper parts of Swanage beach creating a wider beach. Then the cove widens where the softer clays have been more easily eroded.

At the back of the cove is a band of more resistant chalk, so erosion is slower here. New timber groynes were installed on Swanage beach in and have reduced the loss of beach material. An arch at the end of the headland has collpased to form a stack called Old Harry and a stump called Old Harry’s Wife. Over time Old Harry will collapse to form a stump. The spit has continued to join to the Isle of Portland.

However, this creates a strong backwash which removes sediment from the beach and can lead to erosion under the wall. They reflect waves back out to sea preventing erosion of the cliff. New timber groynes were installed on Swanage beach in and have reduced the loss of beach material. Sediment has been deposited over time to form a spit.

The headland juts out into the sea, so it is more vulnerable to high-energy waves. They trap material being transported by longshore drift to create larger beaches which can then absorb wave energy to reduce erosion rates.

An Examination of the coast line in the Swanage Area.

Erosion by waves opened up a crack in the headland, which then geoyraphy a cave and eventually an arch. Chesil Beach is an example of a bar. Lulworth Cove is situated on the south coast of England, on a concordant coastline. Longshore drift affects the bay carrying material mainly gravel from the south to the north of the beach. It has been created by longshore drift.

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The arch is gradually being worn away by mechanical, chemical and biological weathering. But, by stopping the movement of beach material along the coast beaches further down the coast are becoming narrower and subject to more erosion due to reduced ability to absorb wave energy.

Towards the northern end of the bay the cliffs are covered in vegetation, stablising them and protecting them from erosion.

gcse geography swanage case study

The alternating bands of hard and soft rock run parallel to the coast. Over time Old Harry will collapse to form a stump.

Coastal Case Studies

Coastlines where the geology alternates between bands geoyraphy hard and soft rock which are perpendicular to the shore are called discordant coastlines. As areas of the Dorset coast are being eroded, properities and infrastructure are at risk.

How do climate and geolgy influence geomorphic processes? Chemical weathering and erosion are gradually wearing down these down.

An Examination of the coast line in the Swanage Area. – GCSE Geography – Marked by

This is made of chalk which is a gvse rock. The limestone cliffs forming the back wall of the cove are vulnerable to mass movement and sometimes experience small slides and slumps. Coastal management strategies are being used along the Dorset coastline to prevent erosion in some areas but they have impacted the landscape and caused changes to the natural environment. Sea cass Concrete sea walls are in place along most of Swanage beach.

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gcse geography swanage case study

A concordant coastline has the same type of rock along its length. The areas where the soft rock has eroded away, next to the headland, are called bays. Because there’s no erosion, there is no material to replenish the beach meaning the beach level will become lower. How are geomorphic processes creating coastal landforms?

This means waves are slowed, reducing erosion and will help to protect proprties and cliffs.

Coastal Case Studies – Mindmap in GCSE Geography

An arch at the end of the headland has collpased to form a stack called Old Harry and geographu stump called Old Harry’s Wife. Groynes Groynes are wooden or stone barries which are built at right angles to the coast. The bands of soft stufy erode more quickly than those of geographhy more resistant hard rock leaving a section of land jutting out into the sea, called a headland.

This caused the formation of Old Harry, a stack. Dorsert is located on the southern coast of the UK. It connects the Isle of Portland to the mainland. At the back of the cove is a band of more resistant chalk, so erosion is slower here. The spit has continued to join to the Isle of Portland.

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