Year 10 Controlled Assessment Spring / Summer 2012 “How do geomorphic processes affect Hengistbury Head?”Name ______________________________________________Teacher ______________________________________________Tutor group ______________________________________________Date of field visit ______________________________________________
Who are the major stakeholders of Hengistbury Head and why do they care? I am: I care because: I am: I care because: I am: I care because: I am: I care because:
1. Male or Female?2. How old (roughly in Years) are you? – (Guess, don’t ask!!!) 0-15 15-25 25-40 40-50 50-65 65+3. Approximately, how many miles away do you live from this section of coast? 0-5 5-15 15-30 30-50 50-100 100+4. How often, on average, do you visit this section of coast? a. Everyday d. At least once a year b. At least once a week e. Less than once a year c. At least once a month f. This is my first time visiting this section of coast5. Why do you visit this section of coast? a. Walks along the beach d. Other ________________ b. For some peace and quiet c. Job (eg. you work in a local café)6. How important do you feel it is to protect this section of coast from geomorphological processes on a scale of 1-5 (1 = not important at all, 5 = very important)
7. Would you say you visited this section of coast: a.On a regular basis? b.Quite often? c.Rarely?8. What is your opinion on the following statements on a scale of 1-5 (1=strongly disagree, 5=strongly agree) a.Existing sea defences are necessary b.More sea defences should be put in place c.The sea defences are unattractive d.The beaches have been improved by the sea defences e.More sea defences are needed f.Government money could be better spent elsewhere instead of defending this coastline
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
Exposed height of groyne updrift Exposed height of groyne downdriftGroyne (cm) (cm) A B C D E F G H I J
Pebble measurement:The simplest way to measure pebble shape is to classify the stone asvery angular, angular, sub-angular, sub-rounded, rounded or very rounded.Decide which shape is the best fit for each pebble.For an estimate of pebble size, measure the longest (a) axis of each pebble.You should aim for at least 20 pebble measurements from a minimum of three sites.A larger data sample will improve the quality of your investigation, consider your timemanagement in order to achieve this.