Holderness Coast

Leilia Paske
Mind Map by Leilia Paske, updated more than 1 year ago
Leilia Paske
Created by Leilia Paske over 4 years ago
15
1

Description

Mind Map on Holderness Coast, created by Leilia Paske on 12/20/2016.

Resource summary

Holderness Coast
  1. Physical causes
    1. weather
      1. in winter months
        1. north-easterly dominant winds, higher sea level (surges)
          1. heavier precipitation
            1. increased subaerial processes and mass movement (slumping)
        2. Waves
          1. destructive north-easterly waves
            1. fetch up to 800kms
              1. provide strong backwash
                1. eroding and transporting silts out to sea
            2. Geology
              1. weaker boulder clay cliffs erode easier
            3. Human causes
              1. development
                1. increasing the saturation
                  1. increasing pop density
                    1. lesuire and holiday facilities
                      1. impervious surface
                2. interfering with natural coastal processes
                  1. Groynes at Hornsea, Mappleton and Withernsea
                    1. settlements down drift seen rapid erosion
                      1. up to 10 metres per year
                        1. attribute to sediment starvation
                3. constantly eroding, 29 villages have fallen in since the roman times
                  1. strategies used
                    1. Mappleton
                      1. 450 metres of cliff protected by 61,500 tons of rock armour, 2 groynes and a slopping revetment
                      2. Hornsea
                        1. has 1.6 km of sea wall, groynes and rock armour
                        2. Bridlington
                          1. 3.6 km sea wall and groynes
                            1. stabilises beaches
                              1. popular tourist destination 34,000
                          2. Withernsea
                            1. 2.3km of sea wall, groynes and rock armour
                            2. Easington
                              1. environmentally sensitive area
                                1. 1km revetment along base of cliff
                                  1. 133,000 tones of rock
                            3. how sustainable is the management
                              1. most of the land is farmland and has low value
                                1. protection hard to justify
                                2. policy of protection is to defend larger settlements
                                  1. nothing to prevent erosion elsewhere
                                    1. highly expensive
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