Hengisbury Head Coastal Processes

What atomic number 18 geomorphic processes and how do they affect the coast at Hengistbury qualifying? Setting the scene Hengistbury Head is a scenic and historic headland near the town of Bournemouth on the south coast of England. It stands mid-way between Poole harbour and Hurst spit and draws the main division between Poole and Christchurch Bays. Coastal Processes exposition Sub Aerial Coastal erosional processes that are not linked to the action of the sea. Erosion occurs via rain, weathering by excite and frost. Its impact is often seen in soil creep, slumping and landslides. Corrosion When waves approach the coastline they are carrying material such as sand, handclasp, pebbles and boulders. Abrasion occurs when this material is hurled against cliffs as waves hit them, wearing the cliff away. Human activity Much edifice and recreation occurs at the coast, and this affixs pressure on cliff tops, making them more liable to erosion and subsidence. The build of sea defenc es upsets the dynamic equilibrium of the coastline Hydraulic pressure Cliffs and rocks contain many lines of weakness in the form of joints and cracks.A parcel of air can be go on trapped/compressed in these cracks when water is thrown against it. The increase in pressure leads to a weakening/cracking of the rock. Corrasion When waves approach the coastline they are carrying material such as sand, shingle, pebbles and boulders. Abrasion occurs when this material is hurled against cliffs as waves hit them, wearing the cliff away. Coastal Transport explanation Solution Minerals are dissolved in seawater and carried in solution. The load is not visible.Load can come from cliffs made from chalk or limestone, and calcium carbonate is carried along in solution. Suspension Small particles are carried in water, e. g. silts and clays, which can make the water look cloudy. Currents pick up large amounts of sediment in suspension during a storm, when strong winds generate high-energy waves . Saltation Load is bounced along the seabed, e. g. small pieces of shingle or large sand grains. Currents cannot keep the bigger and heavier sediment afloat for long periods. Traction Pebbles and larger sediment are rolled along the seabed.