A claim that a real site is currently safe goes further than any dataset can. What you can write is what the evidence showed on its date, how strong that is and what would need checking now.
This is the last lesson in coasts and marine processes, and it builds on using a sourced case with its date and limits.
How do you word a risk claim?
- Report the finding with its date. “In the 2023 survey, the cliff edge was 15.2 m from the marker.”
- Say how strong the evidence is. Few dates, one source or a short record each make it weaker.
- State the limit. The data does not show storms since that date.
- Say what to check next. A newer survey, a local authority warning or a current assessment.
Real places should be described neutrally and factually, without opinion about who is to blame.
Worked example
All figures are invented for practice. A cliff-top post is measured from the cliff edge in three surveys: 18.0 m in 2019, 16.8 m in 2021 and 15.2 m in 2023.
Step 1, first interval: 18.0 − 16.8 = 1.2 m in 2 years, so 1.2 ÷ 2 = 0.6 m per year.
Step 2, second interval: 16.8 − 15.2 = 1.6 m in 2 years, so 1.6 ÷ 2 = 0.8 m per year.
Step 3, compare: the rate is higher in the second interval, so the retreat looks faster. With only three dates, that is a hint and not proof.
Step 4, check the total: 18.0 − 15.2 = 2.8 m over 4 years, and 1.2 + 1.6 = 2.8 m. Both agree.
Step 5, write the claim: “The surveys show the cliff edge approaching the post at an increasing rate between 2019 and 2023. Because the latest data is from 2023 and covers three dates, it cannot show the present risk, and a current assessment would be needed.”
The mistake to watch for
Over-claim: “The cliff is 15.2 m back, so the footpath is safe.”
The figure is from one date, and “safe” is a judgement the data cannot make.
A better version is “In 2023 the edge was 15.2 m from the post, and retreat had risen from 0.6 to 0.8 m per year, so the evidence points to a growing risk that should be rechecked.” Notice that this is still a clear answer.
A short note on fieldwork safety
These are general points only. Follow your school’s or exam centre’s risk assessment and your teacher’s instructions.
Check tide times and weather, stay well back from cliff edges, and go in a group. Never enter the sea or climb a cliff to take a measurement.
Check yourself
1. Posts show 12.0 m in 2018, 11.0 m in 2020 and 9.4 m in 2022 (invented). Find the yearly rate for each interval.
Show answer
12.0 − 11.0 = 1.0 m in 2 years = 0.5 m per year. 11.0 − 9.4 = 1.6 m in 2 years = 0.8 m per year.
2. Rewrite “The beach is safe to use” for a 2021 survey that found a stable beach.
Show answer
For example: “The 2021 survey found the beach level stable, but it does not show present conditions.”
3. Give one thing to check before relying on older data.
Show answer
A newer survey, a recent storm record or a current local assessment.
Where this leads next
Test the whole module in the coasts and marine processes practice set. Our teachers in online one-to-one Geography tuition can help with the wording of conclusions. The statistics and distribution explorer checks averages.