Podcast
Questions and Answers
What is one of the primary methods for preventing landslides mentioned?
What is one of the primary methods for preventing landslides mentioned?
- Utilizing susceptibility maps (correct)
- Evacuating all residents
- Increasing vegetation cover
- Constructing more buildings
Which factor is NOT likely to cause a landslide?
Which factor is NOT likely to cause a landslide?
- Stabilizing vegetation (correct)
- Steepening the slope
- Heavy rainfall
- Removing top material
How can adding weight to the bottom of a slope help prevent landslides?
How can adding weight to the bottom of a slope help prevent landslides?
- It promotes faster erosion
- It decreases soil moisture
- It encourages vegetation growth
- It increases friction and resistance (correct)
Which condition makes slides more likely to develop?
Which condition makes slides more likely to develop?
What materials are sometimes used to restrict water and slow down weathering?
What materials are sometimes used to restrict water and slow down weathering?
What indicates that an area may be prone to landslides?
What indicates that an area may be prone to landslides?
Which engineering solution can help mitigate the effects of landslides?
Which engineering solution can help mitigate the effects of landslides?
What role does vegetation play in slope stability?
What role does vegetation play in slope stability?
What is one method mentioned for strengthening soil and preventing landslides?
What is one method mentioned for strengthening soil and preventing landslides?
Which of the following is a warning sign that a landslide may occur?
Which of the following is a warning sign that a landslide may occur?
What structural observation might indicate an imminent landslide?
What structural observation might indicate an imminent landslide?
Which of the following actions can be taken to assess landslide risk before construction?
Which of the following actions can be taken to assess landslide risk before construction?
What is a recommended artificial method to help drain water from slopes?
What is a recommended artificial method to help drain water from slopes?
Which sign is NOT indicative of an impending landslide?
Which sign is NOT indicative of an impending landslide?
What is the primary purpose of soil nails in landslide prevention?
What is the primary purpose of soil nails in landslide prevention?
Which of the following is an incorrect statement regarding landslide preparedness?
Which of the following is an incorrect statement regarding landslide preparedness?
What is a recommended practice for household utility installation to minimize breakage?
What is a recommended practice for household utility installation to minimize breakage?
What is a precaution someone should take during long periods of heavy rainfall?
What is a precaution someone should take during long periods of heavy rainfall?
What should you observe as a sign of possible incoming landslide activity?
What should you observe as a sign of possible incoming landslide activity?
What action should be taken immediately if authorities declare an evacuation due to potential landslides?
What action should be taken immediately if authorities declare an evacuation due to potential landslides?
Which structure might be useful to divert debris flow during a landslide?
Which structure might be useful to divert debris flow during a landslide?
After a landslide occurs, what is important to do regarding safety?
After a landslide occurs, what is important to do regarding safety?
What should you listen for that indicates landslide danger?
What should you listen for that indicates landslide danger?
What community support should you provide after a landslide as a trained emergency responder?
What community support should you provide after a landslide as a trained emergency responder?
Study Notes
Landslide Prevention
- Ground assessment: Before buying property, check for historical landslide events in the area. Contact authorities like the Mines and Geosciences Bureau or Department of Environment and Natural Resources for advice and corrective measures.
- Susceptibility maps: Use maps provided by MGB to avoid building in high-risk areas like steep slopes, areas with loose debris or fine-grained soil, and locations of previous landslides.
- Vegetation: Ensure slopes have vegetation to hold surface material in place.
- Shallow slides: These occur more frequently on slopes with minimal vegetation and lack of trees.
- Relocation/Evacuation: Consider relocating structures identified as unsafe due to landslide risk.
Landslide Mitigation
- Buttressing: Add weight to the lower part of a slope with heavy structures to resist movement.
- Boulders: Piling boulders on the toe area can stabilize a slope.
- Slope angle: Lowering the slope angle lessens the risk of movement.
- Shotcrete: This cement mixture is used to restrict water and slow down weathering.
- Rock net/fence/ditch: These features can prevent falling rocks from impacting buildings or roads.
Landslide Warning Signs
- Dry lands: Observe the appearance of springs, seeps, or saturated grounds.
- Pavements & Sidewalks: Look for new cracks or unusual bulges and depressions in the road beds.
- Utilities: Be wary of leaning telephone lines, poles, retaining walls, fences, and broken water lines.
- Doors/Windows: Check if frames are out of plumb.
- Sound: Listen for unusual sounds like cracking wood from trees, or faint sounds of rock rolling that increases in intensity.
Landslide Safety Measures
- Rainfall: After prolonged heavy rain, be extra cautious during intense short bursts of rain.
- Radio/TV: Stay informed about rainfall warnings through radio or televisions.
- Evacuation: Obey early evacuation notices announced by authorities.
- Debris flow: Stay out of the path of landslides or debris flow.
- Mudflow: Be aware of small mud flows or trickles, as they signal a larger potential mudflow.
- Stream/Channel: Watch for sudden changes in water flow and muddy water, indicating a possible upstream landslide.
After a Landslide
- Stay away: Avoid areas where landslides occurred as there might be a risk of additional slides.
- Emergency broadcasts: Listen to information about landslides and related flooding.
- Emergency response: If trained, provide help to those in need.
- PWVD: Look out for the needs of elderly people or persons with disabilities who might need special assistance.
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Description
Test your knowledge on the various strategies for preventing and mitigating landslide risks. This quiz covers essential practices such as ground assessment, the importance of vegetation, and engineering solutions like buttressing and stabilization techniques. Learn how to protect properties and ensure safety in landslide-prone areas.
