What is the Bradshaw Model?
Enjoying Flashcards?
Tell us what you think
What is the Bradshaw Model?
The Bradshaw Model is a theoretical model used to explain how rivers change as they flow downstream.
True or False?
The enquiry process includes identifying a question and context.
True.
The enquiry process includes identifying a question and context.
What is a hypothesis?
A hypothesis is a statement that is tested through fieldwork.
What is systematic sampling?
Systematic sampling means sampling sites at regular intervals to cover all parts of the river.
How are sample sites selected in an enquiry?
Site selection involves sampling to reduce bias.
What equipment is needed for river fieldwork?
Equipment for a river enquiry includes:
Tape measure
Meter rule
Clipboard
Pencil
Camera
Float or flowmeter
Stopwatch
True or False?
Risk assessments are not needed for river fieldwork.
False.
Risk assessments are needed for any fieldwork to consider health and safety.
What is the aim of a risk assessment?
A risk assessment aims to identify and mitigate (reduce) potential risks associated with fieldwork.
"The velocity of River Y will increase with distance downstream". Is this an example of an aim or a hypothesis?
The statement 'The velocity of River Y will increase with distance downstream' is an example of a hypothesis.
Give one risk associated with river fieldwork.
There are several risks associated with river fieldwork including:
Weather conditions
Slippery rocks
Polluted water
Working in an unfamiliar place
Misuse of equipment
Define the term river discharge?
Discharge is the volume of water flowing past a specific point at a given time.
State the equation for calculating discharge.
Discharge (m³/s) = cross-sectional area (m²) x velocity (m/s).
What does cross-sectional area mean?
Cross-sectional area is the area of a river channel perpendicular to the flow.
How is velocity measured in a river?
Velocity is measured by timing how long it takes a float to travel a set distance or using a flowmeter.
True or False?
Photographs are quantitative data.
False.
Photographs and field sketches are qualitative data.
What are the strengths of using line graphs to present data?
Strengths of line graphs include:
Showing trends clearly
Being quick to construct
Easy to interpret
Requiring little explanation.
What are scatter graphs used for?
Scatter graphs are used to show the relationship between two variables.
Define river gradient.
River gradient is the decrease in height of a river over a certain distance downstream.
What may statistical analysis involve for river data?
Statistical analysis may involve calculating the mean for variables like depth and velocity.
What should conclusions state for a river enquiry?
Conclusions should state whether the hypothesis was proved or disproved and explain any anomalies.