Physical impact of coastal management 5. Measure in at least three heights along the beach profile for each groyne. The sediment sample is placed in the top sieve then the sieves are shaken to sort the sediment into the various sieves. Samples of fine sediments clay,silt and sand will need to be taken from the beach to the lab. Cost benefit analysis assessments of coastal defences take into account the cost of a defence and the value of the land and properties that it protects. As the wave cut notch gets bigger, the weight of rock above the notch gets greater. How resilient is the coast at settlement x to changing weather patterns associated with climate change?
Rip-rap or rock armour is often used as a technique of coastal defence. You can compare a series of groynes along a length of beach. The size and shape of coarse sediments can be measured on the beach. Wave Cut Notch and Wave Cut Platform Wave cut platforms are made in a similar ways to waterfalls and gorges rivers topic. We are going to learn about these next. Bays and Headlands Bays and headlands are formed in a very similar way to rapids rivers topic. Here are a few suggestions:
As the process continues the cliff starts to move backwards retreat. Bays are usually more sheltered so there is less erosive power, meaning you often find beaches in bays. Given its importance we need to carefully consider how we manage the coastline to ensure that we can make use of its resources while still preserving its natural beauty and processes. Often it is a good idea to word the question so that people could respond with positive answers, negative answers or a mixture of the two.
If this happens a blowhole is created. Please rank the following statements from 1 most important to 6 least important Answers: After 20 minutes, you may find that some of the pebbles will have disappeared from the beach or moved in a different coast to the others.
Coastal management – FSC Geography Fieldwork
In its simplest form likelihood can be scored depending on the estimated height of the sea defence above a high tide or storm tide. Here are some densities of rocks often used for rip-rap.
Physical impact of coastal management 5. But the coastline is a vulnerable place; at risk from storms, erosion, deposition and sea-level rise. For each location that you visit, decide which score gvse give for each factor. What type of erosion can you see evidence of? As the wave cut notch gets bigger, the weight of rock above the notch gets greater.
How vulnerable is human activity to coastal flooding? The measurement technique used depends on the size of the sediments. It is influenced by the wind, fetch and depth of water.
Repeat the experiment at least 3 times, or until you judge that the running mean for distance travelled by a pebble indicates that you have taken an adequate sample. What coastal management strategies are used at x? The material seaweed, driftwood that is deposited by the sea at furthest point of the high tide. Annotate cousrework the main features using the description above. Task 5 – Either using the photo of the beach in Conwy, North Wales or your own beach photo, annotate the key features of the beach and how it formed.
Caves, Arches, Stacks and Stumps Caves, arches, stacks and stumps are usually found on headlands, where wave refraction is causing erosion courrsework three sides. Is coastal squeeze happening at x? What historical evidence is there for the impact of these hard defences?
The area of land between high tide and low tide. Research questions Sub questions What is the impact of the coastal defences at x? Headland A piece of land that sticks out into the sea. To find out how waves move material many KM along the coastline.
Why is there a high risk of flooding at Happisburgh purple shading but little risk of flooding at Walcott? There are two ways of presenting statements:. Do nothing Allow natural processes to take over.
Coass table below shows how the height of the defence can be categorised. The backshore is the area above the normal high tide coursewkrk, the foreshore is the area in between normal high and low tide and offshore is the area below the normal low tide. The low area in between two waves. The mass of sediment in each sieve is measured using scales and the percentage of the total sample can be calculated.
You can collect field data on the effectiveness of the rip-rap simply by measuring the length, width and height of each boulder.