Active learning ideas
Mass movement and tsunamis are high-energy geological events that can reshape landscapes and devastate coastal communities. This topic examines the mechanics of slope stability, focusing on the balance between shear strength and shear stress. Students investigate how factors like pore water pressure, rock structure, and human interference (such as deforestation or over-steepening) trigger landslides and rockfalls. Additionally, the course covers the generation and propagation of tsunamis, primarily through subduction zone earthquakes and submarine landslides.
Activity 01
Groups use sand boxes to create slopes of varying angles. They test the effect of adding water (increasing pore pressure) and adding 'vegetation' (roots/sticks) to see how these factors change the 'angle of repose' and trigger failure.
What geological factors make a slope prone to failure?
Activity 02
Students are given 'buoy data' and 'seismic alerts' from an ocean basin. They must calculate the travel time of a potential tsunami to various coastal cities and decide which areas need immediate evacuation and which only need a 'watch' status.
How do tsunamis propagate across ocean basins?
Activity 03
Display images of different engineering solutions (e.g., gabions, rock bolts, shotcrete, sea walls). Students move around to evaluate the cost-effectiveness and environmental impact of each method for a specific high-risk site.
What role does deforestation play in increasing landslide frequency?
A few notes on teaching this unit
Watch Out for These Misconceptions
Tsunamis are just 'big waves' like those at the beach.
Tsunamis are surges of water with much longer wavelengths and periods than wind waves; they behave more like a rapidly rising tide that doesn't stop. Using video analysis and peer discussion helps students understand the immense volume of water involved.
Landslides only happen on very steep mountains.
Even gentle slopes can fail if the underlying geology is weak (e.g., clay layers) or if pore water pressure is high. Hands-on modeling with different materials (clay vs. sand) shows students how internal structure matters as much as gradient.
Methods used in this brief
Seismic Hazards and Prediction
An in-depth analysis of earthquake mechanisms, focusing on the factors that determine seismic risk and vulnerability. Students will evaluate current methods for earthquake prediction and early warning systems.
8 methodologies
Volcanic Hazards and Mitigation
Students examine the relationship between magma composition, tectonic setting, and eruptive style. The topic covers the monitoring of active volcanoes and the management of associated hazards like pyroclastic flows and ash falls.
8 methodologies