River Wyre Field Work

?
  • Created by: Madi_Lily
  • Created on: 06-12-17 16:28
View mindmap
  • Understanding the Bradshaw Model
    • The speed and velocity decrease as you move downstream
      • This goes against Bradshaw's Model
        • The velocity increases as you move down the stream as more water is added via tributaries
    • Velocity Evaluation
      • problems
        • channel very narrow so it is difficult to take the 3 readings (left, middle, right)
        • low water levels resulted in sticking
        • 5 times at each location was problematic due to time constraints
      • Bar chart is a relevant way to show the data
    • Depth and Width
      • depth and width will increase as you move down stream
        • This is inline with Bradshaw's model
          • Increased discharge increases erosion so the channel becomes wider and deeper further down the rivers course
      • Problems
        • accurate recordings are needed to produce the true likeness of channel in cross section
        • For a full cross section you need to measure the distance from the bankfull height to the surface of the water level
      • Cross sections are an appropriate way to display the change in channel shape
        • need to be clearly labelled with appropriate scales
        • As a result this should clearly show the hypothesis
    • Stone Size and shape
      • The stones will decrease in size and become more rounded as we move downstream
        • This supports Bradshaw's model
          • due to increased attrition as the channels velocity increases the sediment should become smaller, smoother and rounder
      • Problems
        • Measuring radius, depth and width can be difficult with a ruler
        • Determining shape from chart can be challenging
        • Drawing 2D results can be vague
          • could be backed up by photos
        • A whole class sample combined to produce a colour coded scatter graph could be more effective to present data
    • Overall Issues
      • The length of the river wyre transect was too short
        • Needed a longer transect in the middle or lower course of the river to prove it follows the Bradshaw model
      • Major time constraints
        • more time was needed at each site to gather sufficient data and disprove/ prove our hypothesis
      • Accurate and annotated field sketches back with photographic evidence to help identify the change in channel characteristics as we moved downstream

Comments

Heidi54

Report

This is about the Brashsaw model, not a River Wyre case study??

Similar Geography resources:

See all Geography resources »See all Field Work resources »