Areas that are generally prone to landslide hazards
- On existing old landslides.
- On or at the base of slopes.
- In or at the base of minor drainage hollows.
- At the base or top of an old fill slope.
- At the base or top of a steep cut slope.
- Developed hillsides where leach field septic systems are used.
What are landslide prone areas in the Philippines?
Based on Department of Environment and Natural Resources, Mines and Geo-Science Bureau (DENR0MGB) had listed top 10 landslides prone provinces such as Benguet, Mountain Province, Nueve Vizcaya, Kalinga Apayao, Southern Leyte, Abra, Marinduque, Cebu, Catanduanes, and Ifugao.
Is the Philippines a landslide prone area Why or why not?
The Philippines is prone to various natural hazards, i.e. typhoon and earthquakes, thus, occurrence of landslides is inevitable. Awareness and preparedness are the most effective prevention and mitigation measures against possible threats of landslide in the community.
How can the impact of landslides be reduced?
There are also various direct methods of preventing landslides; these include modifying slope geometry, using chemical agents to reinforce slope material, installing structures such as piles and retaining walls, grouting rock joints and fissures, diverting debris pathways, and rerouting surface and underwater drainage.
What are the causes of landslides?
Landslides are caused by disturbances in the natural stability of a slope. They can accompany heavy rains or follow droughts, earthquakes, or volcanic eruptions. Mudslides develop when water rapidly accumulates in the ground and results in a surge of water-saturated rock, earth, and debris.
What is the reason why Marinduque is prone to landslide?
The team determined that the increased groundwater seepage to be the primary cause of landslide. The secondary cause was the slope’s subsurface material, which is made from unconsolidated sediment instead from a more competent bedrock.
How can we manage landslide?
In the guidelines, the following nine major areas have been identified for systematic and coordinated management of landslide hazards:
- Landslide hazard, vulnerability, and risk assessment;
- Multi-hazard conceptualization;
- Landslide remediation practice;
- Research and development, monitoring and early warning;
Is Rizal prone to landslide?
Earthquake induced landslide hazard in areas in GMMA Philippines 2018. Among the areas within the Greater Metro Manila Area in the Philippines, about 37.6 percent of land area in Rizal was prone to landslide and ground shaking hazards in the event of an earthquake in 2018.
Where do landslides happen the most?
The primary regions of landslide occurrence and potential are the coastal and mountainous areas of California, Oregon, and Washington, the States comprising the intermountain west, and the mountainous and hilly regions of the Eastern United States. Alaska and Hawaii also experience all types of landslides.
What is the rating scale for landslides?
Hazard levels are: (1) 0%–20% (very low); (2) 20%–40% (low); (3) 40%–60% (intermediate); and (4) 60%–100% (high). As a second attempt, a statistical model of landslide hazard was developed using the reconnaissance inventory of slope movements and the thematic information available at small scale (Fig.
What do you think is the best way to prepare for landslide damage?
Preparing for a Potential Landslide
- Prepare for landslides by following proper land-use procedures – avoid building near steep slopes, close to mountain edges, near drainage ways or along natural erosion valleys.
- Become familiar with the land around you. …
- Get a ground assessment of your property if possible.
What is the number 1 province at risk when it comes to a landslide?
The Cordillera region has the highest risk of landslides in the Philippines.
Which among the following human activities can trigger a landslide?
Construction works, legal and illegal mining, as well as the unregulated cutting of hills (carving out land on a slope) caused most of the human-induced landslides.
How are landslides caused by human activities?
Many human-caused landslides can be avoided or mitigated. They are commonly a result of building roads and structures without adequate grading of slopes, poorly planned alteration of drainage patterns, and disturbing old landslides.
What is the conclusion of landslide?
Conclusion. Landslides are a dangerous hazard that can cause serious damages, death, injuries and affect a variety of resources. By understanding the different types and causes of landslides it can help us predict future occurrences and reduce the potential effects.
What damage can a landslide do?
The impact of a landslide can be extensive, including loss of life, destruction of infrastructure, damage to land and loss of natural resources. Landslide material can also block rivers and increase the risk of floods. … After Tropical Storm Stan in 2005, landslides caused the watersheds in Guatemala to collapse.
What are the towns in Marinduque?
Marinduque is divided into six towns, which are normally divided into east and west.
- 1 Boac.
- 2 Gasan.
- 3 Santa Cruz.
Is Marinduque part of Mindoro?
The provincial island of Marinduque is found in between Oriental Mindoro and Quezon Province at the Southern Part of Luzon. It is part of the Region IV-B provinces, along with (Occidental and Oriental) Mindoro, Romblon, and Palawan.
What are 4 causes of landslides?
Almost every landslide has multiple causes. … Landslides can be initiated in slopes already on the verge of movement by rainfall, snowmelt, changes in water level, stream erosion, changes in ground water, earthquakes, volcanic activity, disturbance by human activities, or any combination of these factors.
What is landslide and its causes and effects?
Landslides can cause seismic disturbances; landslides can also result from seismic disturbances, and earthquake-induced slides have caused loss of life in many countries. Slides can cause disastrous flooding, particularly when landslide dams across streams are breached, and flooding may trigger slides.
What are the 4 types of landslides?
Landslides are part of a more general erosion or surficial pro- cess known as mass wasting, which is simply the downslope movement of earth or surface materials due to gravity. They are classified into four main types: fall and toppling, slides (rotational and translational), flows and creep.