Physical fieldwork- Is hard engineering controlling longshore drift at Hornsea?

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  • Physical fieldwork- Is hard engineering controlling longshore drift at Hornsea?
    • Where and why?
      • Hornsea- North East England- Holderness coastline
      • Fastest eroding coastline in Britain which means that longshore drift and movement of sediment will be visible.
        • Clear evidence to prove our question.
    • Link between 2 data sets.
      • Anomalies
        • Anomaly for the drop of the groyne
          • At groyne 5, north side drop was bigger that the south side drop.
            • This may be because at that section/ area of the beach the prevailing wind has changed direction. Or it could just be an inaccurate measurement.
    • Risk assessment
      • Isolation
        • 2
          • Make sure to stay in groups and look out for a teacher.
      • Tide times
        • 2
          • Check tide times and plan your visit ahead.
      • Trip/ fall over
        • 3
          • Look  where  you are walking.
      • Rain
        • 2
          • Be aware of potentially slippery surfaces.
    • Types of sampling
      • Systematic sampling
        • Deliberately choosing which areas to sample to ensure coverage of all areas you want to study.
          • Specific points to analyse.
      • Stratified sampling
        • Data is collected at set intervals.
          • Every 5th house/ every 5 metres.
      • Random sampling
        • Sampling using random numbers, where every item has an equal chance of being chosen.
          • House numbers and then some chosen to analyse.
  • Methods
    • Measure groyne sediment heights on either side of the groyne.
      • This is to see which way longshore is occurring and to see if sediment is being trapped.
        • We can clearly see which way longshore drift is occuring. However we may have made inaccurate measurements which affected our results.
    • Measure beach length either side of the groyne to help confirm the extent of longshore drift- measure to the swash zone.
      • This allows us to see the difference in length of the beach where longshore drift is.
        • By using this method we were able to see where longshore drift is hitting the beach and how it differs depending on the direction of longshore drift. But groups may have measured to different points which would make our data inaccurate.
    • Take photos of the differences in sediment build up and different widths of the beach.
      • We can carefully analyse the data when we return.
        • It was good to be able to analyse the photos in more detail when we returned and it's evidence that we have actually been. However , it doesn't show the actual height and the photos can be biased against what you actually want to see.
    • Physical fieldwork- Is hard engineering controlling longshore drift at Hornsea?
      • Where and why?
        • Hornsea- North East England- Holderness coastline
        • Fastest eroding coastline in Britain which means that longshore drift and movement of sediment will be visible.
          • Clear evidence to prove our question.
      • Link between 2 data sets.
        • Anomalies
          • Anomaly for the drop of the groyne
            • At groyne 5, north side drop was bigger that the south side drop.
              • This may be because at that section/ area of the beach the prevailing wind has changed direction. Or it could just be an inaccurate measurement.
      • Risk assessment
        • Isolation
          • 2
            • Make sure to stay in groups and look out for a teacher.
        • Tide times
          • 2
            • Check tide times and plan your visit ahead.
        • Trip/ fall over
          • 3
            • Look  where  you are walking.
        • Rain
          • 2
            • Be aware of potentially slippery surfaces.
      • Types of sampling
        • Systematic sampling
          • Deliberately choosing which areas to sample to ensure coverage of all areas you want to study.
            • Specific points to analyse.
        • Stratified sampling
          • Data is collected at set intervals.
            • Every 5th house/ every 5 metres.
        • Random sampling
          • Sampling using random numbers, where every item has an equal chance of being chosen.
            • House numbers and then some chosen to analyse.
  • Description
    • Justification
      • Evaluation
  • Key
  • Conclusion
    • Reliability
      • Fairly reliable because we were able to collect the data ourselves so we know the results are genuine for us.
      • Other data
        • How much the sea wall erodes at the bottom.
        • Data from an area with no coastal protection to compare to our results.
        • More data relating to the sea wall
    • Firstly, the data from the sediment drop on the north side, which averages at 66.1cm, shows that longshore drift moves from north to south. This helps us answer the key question because the build up of sediment should be on the side of the groyne which is in the direction of the longshore drift. It shows that the groynes are preventing longshore drift from occurring. The photograph which shows this proves that the sediment was higher on the north side than on the south side which is what we can expect. On the other hand, the average drop on the south side was 158.1cm. This shows us that because the sediment is being deposited on the north side, nothing is being moved to the south side.
      • Overall, I believe that using my data I am able to answer the fieldwork question. This is because all of my data shows the same conclusion which is that hard engineering is controlling longshore drift at Hornsea.
  • Drop from the top of the groyne and beach width.
    • Smaller drop on north side= longer beach width on average.
  • Risk Factor
    • Level of risk (1-4)
      • Reducing the risk
  • Data collection
    • Primary data
      • Data that you collect
        • How much sediment has built up behind the groyne
    • Secondary data
      • Data that has been collected  elsewhere.
        • Difference in sediment height at different points in the year.
  • Description
    • Example
    • What
  • What
    • Description
      • Example

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