Data Collection Transect

Question 0

Discuss the strength of the technique

Answer 0

Systematic sampling cuts out bias
Metre ruler gives precise readings and can be easily compared
Group conclusion on bed load shape eliminates individual bias

Question 1

Describe and justify what you did

Answer 1

Tape measure used to measure flow of river and divided by 10
Systematic sampling- no bias
Depth of river measured by metre ruler-narrow edge facing into flow
Bed load measured by power of roundness scale

Question 2

Discuss the weaknesses/limitations of the technique

Answer 2

Sample size not enough further downstream
Sampling can affect accuracy
Powers of roundness is a qualitative technique, pictures not clear
Measuring B axis was difficult
Some rocks were too big to lift out of the bed