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Blencathra fieldwork questions
1. a) Aim : To investigate and observe the downstream changes in the Glenderaterra Beck near the Blencathra Field Study Centre in the Lake District National Park.
Hypothesis 1: as you go further downstream the higher the velocity will be as the higher capacity of the river will mean it has more energy so will travel faster and the channel will be wider and deeper leading to less friction and a higher hydraulic radius
Hypothesis 2: As you go further downstream the bedload size will become smaller and rounder as attrition will have worn away the bedload making them decrease in size.
b) Hypothesis 1: As you go further downstream, more tribrituaries, precipitation and potentially snowmelt will increase the capacity of the river. This increased capacity will increase the energy of the river, further eroding the beds and banks of the river and increasing it’s cross sectional area. As the beds and banks will have eroded, they will be much smoother hence decreasing friction and increasing the river’s efficiency.
Hypothesis 2: As stream order and distance downstream increase, the bedload found at these areas would be expected to be much rounder and smoother than bedload found upstream on an earlier stream order. This is due to the bedload further downstream being eroded over time, by processes of abrasion and attrition, which reduces the smoothness and size of the bedload. Upstream, the bedload in the channel is still large and angular because the river has had neither the time or the power to erode the bedload.
2. a) The selection of our sites allowed us to take samplings and observe downstream changes at 3 different locations down the river and at 3 different stream orders, the fact we took 5 sets of data from 3 different stream orders allowed us to observe the changes downstream using both stratified sampling ( 1st,2nd,3rd(X2 with one being further downstream) order streams) and systematic sampling (5 10meter intervals).
1. a) Aim : To investigate and observe the downstream changes in the Glenderaterra Beck near the Blencathra Field Study Centre in the Lake District National Park.
Hypothesis 1: as you go further downstream the higher the velocity will be as the higher capacity of the river will mean it has more energy so will travel faster and the channel will be wider and deeper leading to less friction and a higher hydraulic radius
Hypothesis 2: As you go further downstream the bedload size will become smaller and rounder as attrition will have worn away the bedload making them decrease in size.
b) Hypothesis 1: As you go further downstream, more tribrituaries, precipitation and potentially snowmelt will increase the capacity of the river. This increased capacity will increase the energy of the river, further eroding the beds and banks of the river and increasing it’s cross sectional area. As the beds and banks will have eroded, they will be much smoother hence decreasing friction and increasing the river’s efficiency.
Hypothesis 2: As stream order and distance downstream increase, the bedload found at these areas would be expected to be much rounder and smoother than bedload found upstream on an earlier stream order. This is due to the bedload further downstream being eroded over time, by processes of abrasion and attrition, which reduces the smoothness and size of the bedload. Upstream, the bedload in the channel is still large and angular because the river has had neither the time or the power to erode the bedload.
2. a) The selection of our sites allowed us to take samplings and observe downstream changes at 3 different locations down the river and at 3 different stream orders, the fact we took 5 sets of data from 3 different stream orders allowed us to observe the changes downstream using both stratified sampling ( 1st,2nd,3rd(X2 with one being further downstream) order streams) and systematic sampling (5 10meter intervals).