Kingsdale Beck - Geog 2
- Created by: Dreamerfisher
- Created on: 18-05-17 17:11
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- Kingsdale Beck
- Method of Presentation
- Log normal box and whisker plot
- Site 3.1
- Range of 16-39,466 cm3
- Interquartile - 1409.5
- Site 3.3
- Range of 0- 5596 cm3
- Interquartile - 1094 cm3
- Advantages
- Able to display a large range of data, avoiding clusters due to data being over 4 orders of magnitude
- Hypothesis: There is no significance difference between the volumes of bedload in two 3rd order streams
- Mann-Whitney:120
- critical value:127
- Untitled
- Site 3.1
- Log normal box and whisker plot
- Theory
- Hjulstrom
- As the velocity increases it will take away everything smaller than the pick up velocity meaning only larger rocks will remain
- Smaller bed load particles further downstream will be most likely eroded as the velocity will be a lot higher then upstream
- Bradshaw
- where the triangle is wider it is where the characteristic is of a larger quantity or size
- The particle size links into the velocity and how this increases as you go further downstream
- Therefore the higher the velocity the more erosion will take place, meaning the bedload will get smaller, as is also suggested
- Channel bed roughness should also decrease as you go downstream, and therefore also refers to the roundness of the rocks in the channel
- expected there to be anomalies as we hadn't ensured we differentiated between different rock types and therefore erosional abilities
- Strahler's stream order
- Difference between the channel characteristic upstream and further downstream
- Due to different amount of water that will have come from other channels
- Hjulstrom
- Risk Assessment
- Kingsdale Beck
- High risk
- Face upstream, work together, work downstream, no deeper than wellies
- High risk
- Adders
- Lower risk
- Brief to avoid, no sandles
- Lower risk
- Steep slopes
- On site brief
- Ensure to take care when walking down slopes and also to make sure rest of group is able to move down
- On site brief
- Road crossing
- park on left hand side where possible so that door doesn't open onto road, green cross code
- Kingsdale Beck
- Location
- Yorkshire Dales National Park
- Source end of River Twiss, meeting the River Doe further downstream to form River Greta in Ingleton
- Several 1st order streams at the top of the valley near our first site
- land around here is peaty
- 5th order stream near the end of the periglacial lake
- valley sides and valley bottom of the rest of the basin is limestone
- Yoredale series
- Alternating layers of gritstone and limestone and some softer layers of shale and coal
- Yoredale series
- valley sides and valley bottom of the rest of the basin is limestone
- Several 1st order streams at the top of the valley near our first site
- Temperate West-coast maritime climate
- On average 200mm of rainfall per year
- 500m gradient either side of channel with a relatively flat narrow bottom which widens further downstream
- Sampling Technique
- Stratified
- chose whereabouts our sites were going to be to ensure we had different stream orders
- Systematic sampling
- sites were equally spaced apart (50m in between each site at each order) in order to ensure show an environmental gradient in each order
- important as hypothesis was changes downstream
- 12 sites in order to allow enough levels of significance in spearmans rank
- sites were equally spaced apart (50m in between each site at each order) in order to ensure show an environmental gradient in each order
- 1. Used a 50m tape measure as a transect from one bank to the other
- 2. Then a random number table to find a measurement along the transect eg. 56.2 = 5.62m
- 3. repeated this 20 times at each site, then lined them up in size order making it easier
- Meant we took an unbiased sample, reduced chance we would always take out small rocks
- Stratified
- Primary data collection
- Stone roundness
- Power's scale of roundness index table
- scale ranges from 1(very angular) to 6(well rounded)
- minimum of 5 categories to get different categories for chi-squared
- scale ranges from 1(very angular) to 6(well rounded)
- Power's scale of roundness index table
- moderated
- making sure the same person decided the roundness as it is subjective
- 10 sites in order to get levels of significance
- Stone roundness
- Conclusion
- Kingsdale Beck isn't a typical river
- shouldn't be a difference between two 3rd order streams and should be a difference downstream but there isn't
- therefore even the bedload doesn't represent a typical river
- couldn't collect velocity and therefore discharge as well
- impellor wasn't working effectively
- only measured bedload rather than flow characteristic
- only one part of Hjulstrom and Bradshaw measured
- shouldn't be a difference between two 3rd order streams and should be a difference downstream but there isn't
- Kingsdale Beck isn't a typical river
- Method of Presentation
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