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    Scientific Tools For Assessing Landslides and Sinkholes

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    joy macalintal
    Scientific tools like laser rangefinders and ground-penetrating radar can accurately measure landslide and sinkhole vulnerability. Laser rangefinders measure slope angle and soil properties to assess landslide risk, while ground-penetrating radar provides subsurface images to detect voids and cracks indicating sinkholes. These tools have mapped sinkholes in Bohol and Cebu following a 2013 earthquake. Ongoing geohazard mapping by DENR identifies high landslide risk areas. Precautionary measures include planting vegetation, diverting mudflows, avoiding drainage areas, and evacuating if a landslide or sinkhole occurs.

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    Scientific Tools For Assessing Landslides and Sinkholes

    Uploaded by

    joy macalintal
    590 views17 pages
    Scientific tools like laser rangefinders and ground-penetrating radar can accurately measure landslide and sinkhole vulnerability. Laser rangefinders measure slope angle and soil properties to assess landslide risk, while ground-penetrating radar provides subsurface images to detect voids and cracks indicating sinkholes. These tools have mapped sinkholes in Bohol and Cebu following a 2013 earthquake. Ongoing geohazard mapping by DENR identifies high landslide risk areas. Precautionary measures include planting vegetation, diverting mudflows, avoiding drainage areas, and evacuating if a landslide or sinkhole occurs.

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    Useful scientific tools

    Original Title

    Scientific Tools

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    Scientific tools like laser rangefinders and ground-penetrating radar can accurately measure landslide and sinkhole vulnerability. Laser rangefinders measure slope angle and soil properties to assess landslide risk, while ground-penetrating radar provides subsurface images to detect voids and cracks indicating sinkholes. These tools have mapped sinkholes in Bohol and Cebu following a 2013 earthquake. Ongoing geohazard mapping by DENR identifies high landslide risk areas. Precautionary measures include planting vegetation, diverting mudflows, avoiding drainage areas, and evacuating if a landslide or sinkhole occurs.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    590 views17 pages

    Scientific Tools For Assessing Landslides and Sinkholes

    Uploaded by

    joy macalintal
    Scientific tools like laser rangefinders and ground-penetrating radar can accurately measure landslide and sinkhole vulnerability. Laser rangefinders measure slope angle and soil properties to assess landslide risk, while ground-penetrating radar provides subsurface images to detect voids and cracks indicating sinkholes. These tools have mapped sinkholes in Bohol and Cebu following a 2013 earthquake. Ongoing geohazard mapping by DENR identifies high landslide risk areas. Precautionary measures include planting vegetation, diverting mudflows, avoiding drainage areas, and evacuating if a landslide or sinkhole occurs.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    of 17

    Scientific Tools for

    Assessing Landslides and


    Sinkholes
    In some cases, the vulnerability of an
    area to landslides or sinkholes can be
    measured and validated more
    accurately through scientific
    instruments.
    For Landslides

    ABNEY LEVEL OR LASER


    RANGEFINDER

    - It is equipped with a tiltmeter that is


    used to measure the slope angle, soil
    comeaction, and soil strength of an area.
    For Sinkholes

    GROUND- PENETRATING RADAR


    (GPR)

    - used to provide images of subsurface


    ground
    - It can detect the type of object, changes
    in materials and voids and cracks under a
    layer of soil.
    - The measurement can reach up to 15m.
    - GPR has been widely used in
    mapping sinkholes in Bohol and Cebu,
    where both showed the presence of
    sinkholes during an earthquake event in
    2013
    Using Geohazrd Maps
    Areas that have the highest vulnerability
    to rainfall-induced landslides have
    already been identified by the MGB of the
    department of Environment and Natural
    Resources (DENR) through their
    Geohazard Mapping and Assessment
    Program
    This program is an ongoing priority
    project of the DENR designed to provide
    accurate and detailed profile of the terrain
    of the Philippine soils.
    Precautionary Measures in Case of a
    Landslide or a Sinkhole
    LANDSLIDES
    If Your Area is Prone to Landslides
    Plant more trees, grasses, and other vegetation.
    Build channels for diversion of mudflow or debris flow
    to direct the flow away from your property
    Do not build your house on or near steep slopes,
    mountain edges, drainages, or natural erosion valleys.
    Before a Landslide
    Be familiar with your surroundings.
    Watch for any changes in apperance or
    positions of tgese objects. When ther is a
    sudden debris flow, this could be a good
    indicator of an incoming landslide.
     Avoid open storm-water drainage and runoff as thes areas are likely to receive
    debris and soil from higher elevations, especially when there is a storm or heavy
    rainfall.
     Be updated on news regarding the condition of your area.
     Learn and participate in emergency responses and evacuation plans for your
    community.
    During Landslide
     Be attentive to unusual sounds such as cracking objects, moving debris, and
    rolling boulders.
     Stay away from the path of debris.
     Stay on an elevated and sturdy area.
     If escape is not possible, curl into a tight ball and protect your head.
    After a Landslide
     Avoid the slide area.
     Listen for the latest emergency information.
     If the landslide is caused by rainfalk, watch out for flooding as it wilk follow the
    same path taken by the debris flow.
     Check for injured or trapped people near the slide, and for damaged structures and
    other potential hazards. Report these immediately to the rescuers or authorities.
    SINKHOLES
    If sinkholes are not detected earlier and it appears suddenly, do the ff:
     Find refuge in a stable ground or open area.
     Wait until yhe structures on and around the sinkhole stop moving. Do not attempt
    to go back and retrieve your belongings.
     Wait for the local government's announcement when it is safe to go back.
    After a Sinkhole's Appearance
     Stay away from the sinkhole.
     Monitor the damages on objects.
     Do not throw anything into the sinkhole.
     Secure whatever is left of your properties and relocate to safe grounds, preferably
    far from this location because the same bedrock or soil profile may characterize
    the vivinities of the sinkhole.

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