Edexcel GCSE Geography B (1GB0) — Geographical Investigations
Have you ever noticed how a beach isn't just a flat ramp of sand, but has distinct ridges and dips? To understand how waves shape this environment, geographers measure beach morphology by creating a beach profile.
To conduct this fieldwork, place the first ranging pole at the start of the transect and the second at the first break of slope. Measure the ground distance between them using the tape measure. Next, look through the clinometer from a specific height on the first pole to the exact matching height on the second pole. Read and record the angle in degrees, then move the poles to the next segment and repeat.
A single handful of pebbles can reveal the energy levels of the waves that shaped them. To ensure the data is representative and unbiased, researchers follow this sequential method:
Systematic sampling is deliberately chosen here to remove human bias in selecting pebbles. It ensures the entire beach is represented evenly, allowing geographers to identify clear spatial trends, such as how sediment size decreases closer to the sea due to attrition.
The vertical rise of each beach segment can be calculated using trigonometry.
Calculate the vertical height of a beach segment where the distance between two ranging poles is 4.5 m and the recorded clinometer angle is 8°.
Step 1: m,
Step 2:
Step 3: m
To calculate the Mean Sediment Size for a site:
Example for 5 pebbles (42, 55, 38, 61, 49 mm): mm
Coastal management requires evaluating not just how well hard engineering or soft engineering stops erosion, but how it impacts the community and the environment. Because factors like aesthetics and public access are subjective, geographers use a Bipolar Evaluation (or EQS) following these steps:
Because this method relies on personal opinion, it inherently lacks numerical reliability. To mitigate this subjectivity, students should work in groups and calculate an average score for each criterion to ensure consistency.
Students often confuse systematic and stratified sampling in coastal fieldwork. Remember that systematic is used for sediment (e.g., every 5 m) to remove bias, while stratified is used for profiles (at every break of slope) to capture the true shape.
In 8-mark fieldwork evaluation questions, you must explicitly identify the limitations of qualitative methods like the Powers' Scale or EQS; you must mention they are 'subjective' and prone to 'operator error'.
When describing how to use a clinometer, always state that you must sight it to the exact same height on the opposite ranging pole to avoid parallax errors that distort the angle.
Avoid using confusing axis letters (like a-axis or c-axis) for sediment size in Edexcel exams; just write 'longest axis' to ensure your meaning is clear and you secure the mark.
To gain marks for 'justifying judgements' in a methodology question, explain that field notes or sketches are used alongside bipolar scores to provide evidence for the subjective numbers assigned.
Beach morphology
The physical shape, size, and slope profile of a beach environment and its sediment.
Beach profile
A cross-sectional representation of the landscape running from the shoreline to the back of the beach.
Transect
A designated line across a landscape along which fieldwork measurements are taken to show change over distance.
Ranging poles
Tall, highly visible poles used to mark measurement points along a transect line during fieldwork.
Clinometer
A handheld instrument used to measure the angle or gradient of a slope in degrees.
Stratified sampling
A data collection method where the survey area is divided into distinct categories or zones, such as taking measurements specifically where the beach slope changes.
Break of slope
A specific point on a landscape where the gradient visibly changes.
Callipers
A precision measuring tool used to accurately determine the length of a pebble's axes.
Longest axis
The longest dimension of a piece of sediment, used as the standard measure for sediment size in coastal studies.
Powers' Scale of Roundness
A qualitative visual chart used to categorize sediment shape into six distinct classes based on its smoothness.
Systematic sampling
Collecting data at regular, pre-defined intervals, such as taking a sample every 5 metres.
Coastal management
Strategies and techniques used to protect coastlines from the impacts of erosion and flooding.
Hard engineering
Man-made, artificial structures like sea walls and groynes built to resist and control natural coastal processes.
Soft engineering
Sustainable coastal management methods that work with natural processes, such as beach nourishment.
Qualitative data
Non-numerical information based on subjective observations, opinions, and descriptive qualities.
Environmental Quality Survey (EQS)
A fieldwork method used to record a researcher's subjective judgment on the overall quality of an environment against predetermined criteria.
Bipolar evaluation
A survey technique using a numerical scale with opposing descriptors at either end (e.g., -3 to +3) to record opinions.
Total Success Score
The final sum of all bipolar scores for a specific site, used to compare the overall performance of different management strategies.
Field notes
Qualitative records made during fieldwork (descriptions, sketches, or reasons) used to justify subjective scores in surveys like an EQS.
Put your knowledge into practice — try past paper questions for Geography B
Beach morphology
The physical shape, size, and slope profile of a beach environment and its sediment.
Beach profile
A cross-sectional representation of the landscape running from the shoreline to the back of the beach.
Transect
A designated line across a landscape along which fieldwork measurements are taken to show change over distance.
Ranging poles
Tall, highly visible poles used to mark measurement points along a transect line during fieldwork.
Clinometer
A handheld instrument used to measure the angle or gradient of a slope in degrees.
Stratified sampling
A data collection method where the survey area is divided into distinct categories or zones, such as taking measurements specifically where the beach slope changes.
Break of slope
A specific point on a landscape where the gradient visibly changes.
Callipers
A precision measuring tool used to accurately determine the length of a pebble's axes.
Longest axis
The longest dimension of a piece of sediment, used as the standard measure for sediment size in coastal studies.
Powers' Scale of Roundness
A qualitative visual chart used to categorize sediment shape into six distinct classes based on its smoothness.
Systematic sampling
Collecting data at regular, pre-defined intervals, such as taking a sample every 5 metres.
Coastal management
Strategies and techniques used to protect coastlines from the impacts of erosion and flooding.
Hard engineering
Man-made, artificial structures like sea walls and groynes built to resist and control natural coastal processes.
Soft engineering
Sustainable coastal management methods that work with natural processes, such as beach nourishment.
Qualitative data
Non-numerical information based on subjective observations, opinions, and descriptive qualities.
Environmental Quality Survey (EQS)
A fieldwork method used to record a researcher's subjective judgment on the overall quality of an environment against predetermined criteria.
Bipolar evaluation
A survey technique using a numerical scale with opposing descriptors at either end (e.g., -3 to +3) to record opinions.
Total Success Score
The final sum of all bipolar scores for a specific site, used to compare the overall performance of different management strategies.
Field notes
Qualitative records made during fieldwork (descriptions, sketches, or reasons) used to justify subjective scores in surveys like an EQS.
