1) coastal management involves ways to protect human development but ot take in careful consideration of how it will effect the environment.
2) sea walls, breakwaters, Groynes
3) Sea walls- advantages- stop erosion of the coastline and protect property
disadvantages- often replace foredune, which is an essential part of beach erosion
Breakwaters- stabilise river entrances and provide safe access for boating by keeping the river entrance clear of sand built up
Disadvantages- can act to dramatically alter patterns of erosion, transportation and deposition of sand along the coastline.
Groynes- Advantages- to catch sand and make beaches wider
Disadvantages- however sand tends to accumulate on one side only, creating a different beach from its natural shape.
4) you need to keep the balance between human development and the environment.
Tuesday, November 1, 2011
7.3 Geographical Processes shaping the coastal environment
1) hydraulic action, corrasion and corrosion
2) wave refraction is when energy is concentrated around headlands and more dispersed along beaches located in bays
3) converging waves due to refraction on headland, wave energy concentrated, wave energy difused,
4) the most common erosional landforms found along the coastline are in Victoria called the famous Australian the twelve Apostles
5) longshore drift, deposition and erosion
7) once the material is eroded away by the wind and waves it is transported to other places to be deposited.
8) the most common depositional landforms found along the coastline are beaches and sand dunes
9) coastal dunes are formed by the action of the wind. once sand is deposited on the beach it is then subject to wind transportation. the wind blows the sand landward, which is then trapped by low-lying vegetation like coastal spinifex.
10) waves usually approach the coast at an angle. Once the waves break they start to lose their energy. as the swash travels up the beach it slows until the force of gravity causes it to travel directly back towards the ocean. the water will then be hit by the next wave and the process begins again. sand is transported along the beach by this process
2) wave refraction is when energy is concentrated around headlands and more dispersed along beaches located in bays
3) converging waves due to refraction on headland, wave energy concentrated, wave energy difused,
4) the most common erosional landforms found along the coastline are in Victoria called the famous Australian the twelve Apostles
5) longshore drift, deposition and erosion
7) once the material is eroded away by the wind and waves it is transported to other places to be deposited.
8) the most common depositional landforms found along the coastline are beaches and sand dunes
9) coastal dunes are formed by the action of the wind. once sand is deposited on the beach it is then subject to wind transportation. the wind blows the sand landward, which is then trapped by low-lying vegetation like coastal spinifex.
10) waves usually approach the coast at an angle. Once the waves break they start to lose their energy. as the swash travels up the beach it slows until the force of gravity causes it to travel directly back towards the ocean. the water will then be hit by the next wave and the process begins again. sand is transported along the beach by this process
7.2 Questions Waves- water on the moves
1) Wind- formation of swells and waves- waves enter shallow water the energy in the waves starts to interact with the sea floor
2) the distance the wind travels over the ocean to form a wave. it is an important factor because wind is the main cause for waves.
3) waves in the deeper ocean do not break but cause swells and the further a swell travels the more likely the waves are to form what is called a ground swell.
5) wave forms by the action of the wind blowing across the ocean. when the waves reach shallow water the energy in the wave starts to interact with the sea floor. the wavelegnth becomes shorter and the wave height increases.
6) the difference between the three types of waves is that spilling waves break far from the shore on beaches with gentle slopes. plunging waves break on beaches where the slope is moderately steep and surging waves occur on very steep beaches
7) a wind swell is marked by a short wavelength and high frequency of waves hitting the coast. A ground swell forms when waves have traveled across a greater distance of ocean before hitting the coast.
2) the distance the wind travels over the ocean to form a wave. it is an important factor because wind is the main cause for waves.
3) waves in the deeper ocean do not break but cause swells and the further a swell travels the more likely the waves are to form what is called a ground swell.
5) wave forms by the action of the wind blowing across the ocean. when the waves reach shallow water the energy in the wave starts to interact with the sea floor. the wavelegnth becomes shorter and the wave height increases.
6) the difference between the three types of waves is that spilling waves break far from the shore on beaches with gentle slopes. plunging waves break on beaches where the slope is moderately steep and surging waves occur on very steep beaches
7) a wind swell is marked by a short wavelength and high frequency of waves hitting the coast. A ground swell forms when waves have traveled across a greater distance of ocean before hitting the coast.
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