Investigating Coastal process and management Robin Hoods Bay

Investigating Coastal process and management: Robin Hood’s Bay

Hyperlink to dramatic storm at Robin Hood’s Bay – it isn’t always sunny and warm!

Investigation Aim: Investigate coastal processes at work in Robin Hood’s bay & how these are managed Postcard showing the larger beach in front of the village in 1890’s

Investigation Aim: Investigate coastal processes at work in Robin Hood’s bay & how these are managed Learning objectives for field visit: • Understand how different coastal processes are shaping this coastline • Consider advantages & disadvantages of different coastal defences • Develop fieldwork skills (such as measuring beach dimensions) • Personal learning objective: . . . . ………………. . . Postcard showing the larger beach in front of the village in 1890’s

Is it safe to leave the classroom? What hazards might we face? Use the image above to: - Identify hazards - Suggest how we can manage those hazards

Catchphrase Note down the key coastal term you think is being described on each slide

Rip rap

Headland

Fetch

Soft Hard engineering

Stack

Destructive wave

Longshore drift

Long shore drift = transportation Swash Oblique angle up the beach Backwash Straight back to the sea

Long shor e Dr ift Long shore drift = transportation The net movement of beach material along a coastline aligned with wave direction

Processes of Coastal Erosion Attrition Collision of detached material causing smaller, more rounded particles Wave Pounding (up to 30 tonnes/m²) Corrosion/Solution Chemical reactions breaking down rocks e. g. Salt crystalisation, blue-green algae, carbonic acid in sea water Abrasion/Corrasion Wearing away of coastline by material hurled against it Hydraulic pressure Compression of trapped air & sudden release

Position on the coast High energy coastline Fetch?

Fetch The distance a wave can travel unobstructed by landmasses Fetch up to 1500 km!

Constructive waves STRONG SWASH Large wavelength Low wave frequency CKWASH WEAK BA Eliptical Orbit lo l a h S h c a e w. B

Destructive Waves WEAK SWASH Small wavelength High wave frequency Circular Orbit ASH STRONG BACKW e e t S e b p h c a

Destructive or Constructive?

Global mean sea level rise is caused by an increase in the volume of the global ocean. This in turn is caused by: • Warming the ocean (thermal expansion). • Loss of ice by glaciers and ice sheets. • Reduction of liquid water storage on land. Mean sea levels estimated to rise by 0. 53 – 0. 98 m by 2100 Storm frequency and ferocity may also increase Source: The Intergovernmental Panel on Climate Change (IPCC)