Links to key Data Method Limitations Solutions question What did you Problems? What could you How reliable is do? do to get good your data? data? Sampling?Land use mapBeach Profile
Hengistbury Head map 3: Coastal management techniques
MethodologyIdentify 3 sampling sites across the width of the beach to measure your beach profiles – Mark these clearly on your mapFor each Site:- • Place a Ranging Pole at A (as close to the low-tide mark as safe) • Identify the key points where the slope angle seems to change (eg. Diagram A below) – use each of these points to divide your profile into sections • Measure the distance between point A and B using a measuring tape (Record this in the tables on the next page) • Measure the slope angle between point A and B using a clinometer (Record this in the tables on the next page) • Repeat this process for Sections B-C, C-D, etc Diagram A
Methodology Updrift Downdrift1. Identify a sample of 5-10 groynes and mark these on your map2. As close to the low water Wave Direction mark as is safe use a Diagram C metre rule to measure the exposed height of the groyne updrift (direction waves are coming from) – See Diagram B and C – Record this in the table on the next page3. Repeat the same exercise downdrift of the groyne Diagram B Height of Exposed Groyne
For your safety: • Remain in groups of 2 or 3 at all times • Obey all signs in the area • Do not go into the water No using the or climb on cliffs ferry! In your group, you need to: • Conduct 4 Beach Profiles • Complete 10 Groyne height measurements • Complete pebble sampling • Complete land use mapping • Map sea defencesLimit of activity • Conduct questionnaires • Create field sketches and maps • Take photographs of evidence of coastal processes, existing seaPC= Toilets defences, land uses, economic activity, habitats • Make notes on the area • Complete any extra data collection • Make notes on anyMeet at the café drop off point at 10am, 11:30am, 2pm, 2:30pm problems and limitationsOur slot at Beach survey is: of your data collection
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