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Site Description Very active morphodynamics – risk for beach users I. Generation of Ness pole & NE migration. II. As Ness pole disintegrates, it forms offshore sandbanks which migrate onshore. III. Onshore-migrating shoals attach to shore. I I I II I

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III. II. I. Site Description. Very active morphodynamics – risk for beach users I. Generation of Ness pole & NE migration. II. As Ness pole disintegrates, it forms offshore sandbanks which migrate onshore. III. Onshore-migrating shoals attach to shore. Stage II. - PowerPoint PPT Presentation

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Page 1: Site Description

Site Description

• Very active morphodynamics – risk for beach users

I. Generation of Ness pole &

NE migration.

II. As Ness pole disintegrates,

it forms offshore sandbanks

which migrate onshore.

III. Onshore-migrating shoals

attach to shore.

I

II

III

Page 2: Site Description

Methods• Extract morphology from video ( 6 stages of the

updatedted version of cycle)

Key

Limit of intertidal regionSubtidal contour (-3 m ODN)Sediment transport pathwaysDry land

200 mScale:

Stage I

Access Channel

Shore-attached sand bar

NessHead

Stage II

Access Channel

Offshore sandbank (North)

Offshore sandbank(South) / Ness pole

Bea

ch

Stage III

Spratt Sands

Access Channel

Bea

ch

Offshore sandbank (North)

Offshore sandbank(South) / Ness pole

Page 3: Site Description

Expected results

• Simulations for:• A range of wave heights and directions

• Spring and neap variations

• A range of river discharge

• Characterise risks and produce a chart

explaining them

• Generate a risk map template for the manager to

modify.