Geography Investigation 4A

Here's an investigation me and David did, I haven't included the graph as we want to listen to it. Oh that reminds me I must investigate my circuitry I need to get the kinks out of it.

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Geography investigation
The gradient of the managed section is higher than the unmanaged section
Walton on the Naze, Essex, UK
Characteristics of the area
The beach is split into two sections managed and unmanaged as shown below, there was a cost
benefit analysis done and it was found the area in front of the houses would benefit from coastal
defences this is because things like houses and Naze tower which have higher value so needed to be
protected whereas in the unmanaged section there is limited things located there so it is not worth
protecting. The Naze tower is a tourist attraction and also a marker for where the Harbour is located
for ships coming into the Harwich Harbour. The managed section and unmanaged section is shown
below with the Naze tower and houses that need to be protected shown. Where the area is not
been managed the cliff is retreating at a rate of 2 metres a year.
Geographical theory
Groynes in the managed section mean that they capture more sediment due to longshore drift.
Longshore drift is the process which sediment is moved along a shoreline as the backwash goes out
to sea parallel to the coast, the swash then goes onto the beach in the direction of the waves which
is often at an angle to the beach so does not goes back in the same place so is moved up the
shoreline as shown in the image above. This is more common in the unmanaged side so sediment
gets removed due to nothing to the stop the sediment form being removed, but in the managed
sides stop the sediment getting to the unmanaged side which is then deprived of sediment so is
more easily eroded due to the sediment being "captured" by the groynes which helps build up the
beach in the managed section of the shoreline. So from this we would expect the managed section of
the beach to have a big change of height due to the build-up of sediment whereas the unmanaged
have little change in height. The wave fetch is not that long meaning that the waves have a weak
swash so they act like constructive waves so they help build-up the beach but only when there is
sediment present, this also means that the gradient of the beach would be quite shallow as the
sediment is moved up the beach. Whereas in the unmanaged section the wave cut platform is likely
to be exposed due to the lack of sediment on the beach so would have a fairly flat beach. There has
also been some cliff re grading in the managed section of the beach where the gradient of the slope
is made gentler so it is less prone to slumping or landslides as shown in the image left.
Ranging pole: Used with the theodolite to measure the height of the beach from a particular point

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Theodolite: Helps view the ranging pole from a level point
Tape measure: Used to measure how far along the transect the measurement or investigation is
Clipboard: Results are written down onto this.…read more

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So from this I conclude that the gradient is higher in the managed section of the beach, although my
data does show some obscurities in my data there seem to be a clear trend in the data which is
shown by my graph. But it is hard to say how much steeper by as we did not measure it from the
same point on both beaches.…read more

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Overall I think my conclusion is not valid although the data shows a clear trend which shows a
difference in the two area gradients plus there are no outliers which stand out from the data, but my
conclusion would of been better if I repeated it by using different transects of the beach which I
could take an average so then improving the validity of the results also taken the transects from the
same point on the two areas of beaches.…read more


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