Gully Erosion Case Study

Overview

In this 8th lesson of the unit, students investigate gully erosion in Northern Queensland as a real-world example of how environments change. They analyse environmental impacts and propose practical management approaches, building towards students explaining how places and environments are managed and protected.

Learning intentions

Students will:

• identify key features of the gully erosion environment and its causes
• describe how places and environments change over time due to erosion
• explain environmental impacts on land, water and living things
• demonstrate ways to manage and protect affected places using evidence

Success criteria

Students can:

• use geographic language to describe features (e.g. slope, runoff, gully formation, sediment)
• outline at least two cause-and-effect links for gully erosion
• name and explain at least three environmental impacts
• suggest one management strategy and justify how it protects the environment

Curriculum links

• GELS-DFC-02: Students identify features or characteristics of places and environments
• GELS-PRI-01: Students describe how places and environments change
• GELS-MAN-01: Students demonstrate ways to manage and protect a place or environment
• GELS-APC-02: Students identify ways in which Aboriginal Peoples care for and manage Country (where relevant to local practices and land stewardship)

Lesson structure (60 minutes)

1. 0–5 min · Hook and retrieval. Teacher shows 2–3 images (healthy paddock/nearby gully/after heavy rain) and asks students to jot one “What changed?” statement. Students share a quick idea with a partner, recalling from earlier lessons how environments change.

2. 5–15 min · Mini direct teach: what is gully erosion? Teacher explains using a simple sequence: rainfall → runoff → soil loss → rill to gully → sediment movement; students annotate a provided diagram with labels and one sentence on cause and effect.

3. 15–30 min · Case study analysis (group task). Teacher distributes a Northern Queensland case study sheet with short text plus a simple data table (e.g. sediment increases after storms, land degradation observations) and one map sketch. Students work in groups to complete a “Features–Causes–Impacts” organiser:

• Features: what can be seen on the land/water system
• Causes: what triggers or increases erosion
• Impacts: effects on soil, waterways, habitats and/or land use

4. 30–42 min · Guided discussion: impacts and scale. Teacher draws a whole-class impact chain on the board (cause → process → impact → knock-on effects). Students add at least two “because” links and practise using geographic terms (runoff, sediment, turbidity, habitat loss) to explain impacts clearly.

5. 42–55 min · Management challenge: protect the environment. Teacher introduces the task: “Choose one management strategy for this gully erosion site. Justify using evidence from the case study.” Students individually select one option from a provided menu (e.g. re-vegetation and ground cover, controlling runoff and stormwater, fencing/stock management, erosion control structures, community monitoring, culturally informed land stewardship where applicable). Students write a 6–8 sentence response using a sentence scaffold:

• Claim (strategy)
• Evidence (from features/data)
• Explanation (how it interrupts the erosion process)
• Impact (how it protects the environment)

6. 55–60 min · Exit ticket. Students submit a short exit ticket: “One environmental impact I can explain is… One management action that would help is… because…”

Resources

• Case study sheets on Northern Queensland gully erosion (text, map sketch, and simple data)
• Diagram handout of gully erosion sequence for annotation
• Impact-chain graphic organiser (cause → process → impact → knock-on effects)
• Sentence starters and geographic word bank cards
• Highlighters/colour pencils (to code Features/Causes/Impacts)
• Projector/print images for the hook
• Exit ticket slips or digital form

Assessment

• Formative: teacher circulates during group task, checking students’ cause-and-effect reasoning and geographic language use.
• Formative: observe participation in whole-class impact-chain activity for accuracy and clarity.
• Summative-in-lesson (exit ticket): evaluate whether students identify features, describe change, and link a management strategy to impacts.

Differentiation

• Support: provide sentence starters, word bank, and a partially completed Features–Causes–Impacts table for students who need scaffolding.
• Support: offer an “evidence bank” box with 3–5 phrases pulled directly from the case study to reduce reading load.
• Extension: challenge students to evaluate trade-offs (e.g. costs, time to stabilise soil, potential short-term disruption) and refine their justification.
• EAL: allow oral rehearsal with a partner before writing; provide visuals and allow use of first language for planning notes before translating key statements.
• SEN: use chunked steps with clear time limits; assign roles in groups (reader, mapper, recorder) so every student contributes.

Differentiation checks for accuracy

• Students must refer to at least one specific feature or data point from the case study when justifying their management strategy.
• Students must include at least one “because” statement linking cause/process to an environmental impact.