Geological-Hazards

What are the geological hazards present in the Philippines?

Rockfall, flow, debris avalanches, and slides.

What are the early warning signs of geological hazards?

Signs include changes in landform, increased water flow, and soil saturation.

What mitigation measures can be recommended for geological hazards?

Use of hazard maps, engineering methods, and public education.

How many deaths were caused by the 2009 Ondoy disaster?

465 dead.

What was the outcome of the 2006 Guinsaugon Landslide?

139 dead and 980 missing.

What event occurred in 2013 that had significant flooding in Marikina?

The Habagat Flood.

What is the magnitude of the rise in water level during the 2009 Pepeng Flood?

10.99 m rise.

Which year did the 2014 Ruby Storm Surge occur?

2014.

What is a significant factor in slope failure?

The steepness of the slope and the weight of the material on top.

What color indicates high susceptibility to landslides on hazard maps?

Red.

What is a primary cause of mass movement?

Downslope movement caused by gravity.

What is an alluvial fan?

A fan-shaped deposit of sediment created by streams.

What is the definition of a landslide?

Downward movement of slope-forming materials including rock and soil.

What can help prevent and mitigate mass movements?

Proper hazard zoning, evaluation, and awareness.

What is the effect of water saturation in the ground?

Makes materials heavier, leading to debris flow or mudflow.

How can structural developments contribute to landslides?

By disrupting the balance between the slope angle and its load.

What defines a debris flow?

Rapid downslope movement of rocks and soil with high velocity.

What are the characteristics of a slump?

Translational slides moving along a curved surface of rupture.

How does vertical movement occur in sinkhole formation?

When ground collapses into underground soil cavities.

What is ground subsidence?

The slow lowering of the land surface due to erosional processes.

What were the casualties of the 2018 Ompong Landslides in Itogon?

114 dead with dozens missing.

What kind of mass movement is associated with snowcapped mountains?

Avalanche.

What year did the Typhoon Haiyan occur and what were its effects?

2013; resulted in 2671 dead.

Why should communities participate in disaster preparedness?

To reduce risks and impacts of geological hazards.

What can be used to assess historical landslide risks?

Records of past events and hazard maps.

What are recognized indicators of possible landslide activity?

New cracks, unusual bulges, and saturated grounds.

What disaster management tool was introduced in the Philippines?

Project NOAH.