Spatial Variations In Geo Enviornment, Case Study (TPOS). Year 13 Essay.

The major processes evident at TPOS is Coastal Erosion, coastal Transportation and coastal deposition ; Spatial Variations is the differences in elements which affect the rate of these processes, coastal Morphology, wave type and wave energy, wind energy, geology and sediment type, biotic tectonic/geologic and climatic variations.

Coastal Morphology is the shape and the structure of the shore line. The shape of the coastline varies so does Coastal Erosion. Erosion is most evident at the headlands; the wave cut platform of Anchor bay the eastern tip of TPOS, Wave refraction is caused around the head land and over time sea caves, arches and stacks are formed. The constant curving of the waves is concentrating erosion onto the headland and it is being eroded the most, the caves get bigger and form arches and finally the arch which i

Another Major element which coastal erosion relies on is geology the sediment type, size rock structure, and supply of the beach material. The strength if coastal rocks influence rate erosion. Also a continual supply of material is needed to erode at a maximum level. Waipapa greywake which is hard and more resistant is found at Jones Bay compared to waitemata comglomerate and sandstone which is soft and new is found as the cover rock on the head lands of Anchor bay and therefore is more venerable to erosion, hydraulic pressure is a common type of erosion noticeable on the headland of Anchor Bay. Hydraulic pressure forms when a parcel of air is trapped and compressed, either in a cliff or between breaking wave and a cliff, the resultant increases in pressure over a period of time, waken and break off pieced rock2. This erosion is more effective where there is abundance supply for sediment in the waves which pound the head land. Also different Sediment and rock types means different percolation rates, Jones Bay has high percolation which means it was go greater swash and low back wash, while Omaha has a low rate . The sediment size is related to coastal deposition, bigger the sediment means lower the threshold velocity therefore the sediment does not travel far up the beach as the smaller sediments. The faster the water travels the further up the beach it can place the sed

Some topics in this essay:
Omaha Sandspit, Jones Bay, Marram Spinfex, TPOS Wave, Bay Hydraulic, Coastal Deposition, Spatial Variations, Type Wave, Erosion Erosion, Coastal Morphology, coastal erosion, head land, anchor bay, spatial variations, coastal deposition, sand particles, omaha sandspit, wave energy, peninsula omaha sandspit, hydraulic pressure, type wave, transportation coastal deposition, erosion coastal transportation, coastal transportation coastal, coastal erosion coastal,