Author Archives: GSD

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MGB RXIII conducts Geologic Quadrangle Mapping in Bicol Region

The Mines and Geosciences Bureau Regional Office No. XIII conducted the Geologic Quadrangle Mapping on May 2 to June 11, 2017 in Bicol Region.

A team of three geologists and one GIS Operator from MGB RXIII conducted the Geologic Quadrangle Mapping in two quadrangles, namely Polangui and Ligao. The Polangui Quadrangle comprises five municipalities and one city ‒ Balatan and Bato, Camarines Sur and Libon, Polangui, Oas, and Ligao City, Albay. On the other hand, the Ligao Quadrangle has 7 municipalities and 3 cities ‒ Polangui, Oas, Guinobatan, Camalig, Daraga, Santo Domingo, Malilipot, Ligao City, Legazpi City and Tabaco City.

The updating of Polangui Quadrangle which has an unpublished geologic map was done on the first phase of the fieldwork (May 2-May 19). The team subsequently proceeded to work on Ligao Quadrangle on the second phase of the fieldwork (May 22-June 11). Methodologies used were river/creek traversing, examining outcrops, exposures, contacts, rock sampling, and using the unpublished geologic map and other literatures to correlate the lithologies observed during the fieldwork.

The accomplishment of the team during the fieldwork are as follows: mapped/identified different lithologies within the Ligao and Polangui Quadrangles; gathered and documented data using a digital camera, handheld GPS, Brunton compass, geologic mapping data sheets and other basic mapping equipment; and obtained 37 rock samples from different locations with proposed 23 samples subject to petrography and paleontology analysis in MGB Central Office.

Geologic maps are important because they provides geologic information that can help reduce death and damage caused by geologic hazards such as earthquakes and landslides. Similarly, they are used to better find and protect or safely extract geologic resources. The said maps support our ability to locate and develop mineral and water resources; assess and protect groundwater quality; safely site solid and hazardous waste disposal facilities; and construct, restore, maintain, and protect sensitive ecosystems. Geologic maps enhance our ability to site and build the nation’s infrastructure of roads and highways, railroads, pipelines, utilities, dams and locks, buildings, and foundations as well as make more informed land‐use and planning decisions to meet societal needs.

 


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MGB RXIII carries on with its Coastal Geohazard Assessment

The Mines and Geosciences Bureau Regional Office No. 13 carried on with its Coastal Geohazard Assessment under the National Geohazard Assessment and Mapping Program.

For the first quarter of 2017, the target municipalities of MGB RXIII are Barobo, Lianga, Hinatuan and Bislig in the Province of Surigao del Sur. As for the second quarter, the Municipality of Del Carmen in the Province of Surigao del Norte was assessed on May 31 to June 7, 2017. The Municipality of Socorro in the Province of Surigao del Norte will be assessed by the third week of June 2017.

The Philippines has one of the longest coastlines in the world with an estimated extent of 36,289 kilometers. Approximately 46% of the total population in the Philippines resides in coastal areas, directly or indirectly relying on coastal resources as source of livelihood, habitation, and recreation. Many of the coastal areas are inherently vulnerable to coastal hazards – geographically or by geologic setting.

The objectives of the Coastal Geohazard Assessment Program are as follows:

  • To determine/identify coastal areas that are susceptible to coastal erosion/accretion; measure coastal profiles and conduct coastline characterization that will be combined with historic data sets to generate a coastal geohazard map.
  • To provide vital information to policymakers and the public in order to make them understand the risk of these hazards; enhance preparedness; reinforce response; foster resilience; and minimize the adverse impacts of these events (baseline record).
  • To produce erosion and accretion susceptibility maps of coastal areas to serve as important references in disaster mitigation and adaptation and in crafting land-use, coping mechanisms and development and management plans of affected communities and stakeholders.

During the actual field assessment, the following activities are undertaken:

  • Shoreline mapping

The objective is to determine coastal shift and retreat or advance of coastline through time. With the use of GPS tracking and tape measure, the shoreline is measured and tracked.

  • Beach Profiling

It aims to survey the shape (morphology) of a beach and investigate the seasonal changes in the beach profile as well as examine relationships between the beach profile and other factors such as rock type, cliff profile, sediment size or shape. Beach sampling is also done on the area where the team conducts the beach profile.

  • Longshore Drift

The objective is to determine the wave direction and where the sediment supply takes place.

  • Historical/Anecdotal Record Gathering

It involves interviews with local government officials and coastal residents (mostly the eldest residents) on the subjects of coastal flooding, coastal erosion, tsunami and other coastal geohazard occurrences in the area. The historical data gathered are used to validate and augment existing and newly acquired field data and selectively factored in the geohazard assessment.

The outputs of the Coastal Geohazard Assessment are shoreline shift maps that will give the public substantial information on coastal areas or shorelines that are prone to erosion and accretion. Threat advisories per purok and technical reports are also included in the expected outputs.


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MGB RXIII conducts Vulnerability and Risk Assessment

The Mines and Geosciences Bureau Regional Office No. 13 is currently conducting the Vulnerability and Risk Assessment (VRA) under the National Geohazard Assessment and Mapping Programme.

For the first quarter of 2017, the target municipalities of MGB RXIII are Magallanes and Las Nieves in the Province of Agusan del Norte. As for the second quarter, the Municipalities of Sibagat and Sta. Josefa in the Province of Agusan del Sur were assessed last April until the second week of May. For the rest of May until June, MGB RXIII will conduct VRA in the Municipalities of San Miguel and Tago in the Province of Surigao del Sur.

The Vulnerability and Risk Assessment is an activity following the 1:10,000 Scale Geohazard Mapping and Assessment which was concluded in 2015. The primary objective of VRA is to evaluate the existing vulnerability conditions within a municipality/city from rain-induced landslide and flood that could potentially harm the elements at risk such as people and infrastructures. The VRA could also provide technical support and information to the local government units (LGUs) in updating their Comprehensive Land Use Plan (CLUP) as well as for disaster preparedness and management.

The VRA is composed of both field assessment and table mapping analysis. Prior to the field assessment, the team pays a courtesy call on the LGUs in order to explain the objectives and methodologies of VRA for proper coordination and planning of the said activity. In addition, data needed for the output of the activity such as the administrative boundaries, road networks database and demographic profile, among others, are requested from the LGUs.

During the actual field assessment, GPS readings of the prominent structures like government facilities, school locations, churches, evacuation sites and establishments are gathered. Tracking of the existing road networks and trails are also recorded. Proposed barangay sites and evacuation centers, if present, are also assessed and located and information supplemented by interviews with the locals of the barangay. An important component of the VRA is the enhancement of the geohazard maps to render the exposure to hazard maps more up-to-date. The table mapping analysis utilizes ArcGIS software in generating the exposure maps. In the said maps, analysis is identified indicative of the vulnerability of the exposed elements at risk. These elements at risk include population, built-up areas and road networks.

The outputs of the Vulnerability and Risk Assessment are exposure maps (population at risk, built-up areas at risk and road networks at risk) and technical reports. An Information, Education and Communication (IEC) Campaign of the results of the said assessment will be conducted in the future.


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MGB RXIII conducts Groundwater Resource and Vulnerability Assessment

The Mines and Geosciences Bureau Regional Office No. XIII conducted Groundwater Resource and Vulnerability Assessment from January to April 2017 in four (4) municipalities of Agusan del Norte and Province of Dinagat Islands.

A team of geologists, geologic aide, and laboratory technician from the MGB RXIII Geosciences Division conducted the said assessment in the following municipalities covering forty-seven (47) barangays:

Municipality                                     No. of Barangays
Las Nieves, Agusan del Norte                             20
Magallanes, Agusan del Norte                              8
Loreto, Province of Dinagat Islands               10
Tubajon, Province of Dinagat Islands              9

One of the functions of the Mines and Geosciences Bureau is the conduct of specialized researches and assessment of the country’s groundwater resources. The Groundwater Resource and Vulnerability Assessment Program is a major activity that the Mines and Geosciences Bureau has initiated to conduct as its contribution to the implementation of one of the provisions of the Clean Water Act (2004) stipulated in Chapter 3 Section 19-D which is to prepare and publish a national groundwater vulnerability map incorporating the prevailing standards and methodologies.

Theobjectives of the Groundwater Resource and Vulnerability Assessment Program are as follows:

  1. Assess the availability of groundwater on the various geologic formations in the entire country;
  2. Establish the quality/chemistry of groundwater in groundwater basins;
  3. Establish the potentials and limitations of available groundwater in the various groundwater basins; and
  4. Assess groundwater vulnerability of aquifers in the country.

Before conducting the said activity, the team paid a courtesy call on the Local Government Unit (LGU) – Municipal Disaster Risk Reduction Management Office (MDRRMO) and the Office of the Mayor of every municipality.

The team is tasked to make an inventory of all the water sources of every barangay during fieldwork.  Similarly, the team must geotag and document the water sources. Primary field data such as geology, geomorphology and the type of water source were gathered. The source of water could either be well type (shallow or deep), spring type, sinkhole, or river. Water samples were also collected per water source for the analysis of physical and chemical properties. The said properties were analyzed within 24 hours after the samples were collected. In addition, interviews were also conducted by the team in every barangay to gather secondary field data such as date of well construction, puroks supplied, location of the water source and other details in order for the team to note the past and present situation of the water sources.


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MGB RXIII joins the conduct of CY 2017 1st Quarter National Simultaneous Earthquake Drill

The Mines and Geosciences Bureau Regional Office No. XIII joined the conduct of the CY 2017 1st Quarter National Simultaneous Earthquake Drill (NSED) on March 31, 2017 at 2:00 P.M. The primary purpose of the earthquake drill is to test the response capacity and capability of MGB RXIII employees to earthquake incidents.

Mr. Romeo M. Dalodado, MGB RXIII Geosciences Division Chief, gave a brief presentation on “How to Conduct an Earthquake Drill” that serves as a guide for employees to what should be done before, during and after an earthquake.  He also discussed the different stages in conducting the earthquake drill which include Planning/Organizing an Earthquake Drill, Developing the Earthquake Evacuation Plan, Orientation Prior to the Conduct of an Earthquake Drill and Actual Conduct of an Earthquake Drill.  Since the earthquake drill is performed quarterly every year, Mr. Dalodado reminded the employees of the established evacuation route and muster point/assembly area of the MGB RXIII Office.  A week before the earthquake drill, Mr. Dalodado gave a lecture on Earthquake and Seismic Hazards to MGB RXIII employees on March 20, 2017 in the aftermath of the magnitude 6.7 earthquake that hit Surigao City and some municipalities in the Province of Surigao del Norte.

The drill started with the one-minute buzzer alarm that indicates earthquake or ground shaking.  Everyone moved away from windows, glass or light fixture and performed the duck, cover and hold under desks, tables or chairs while the siren/bell sounded. After the “shaking” has stopped, everyone evacuated the office building and proceeded to go to identified evacuation areas using pre-determined routes.  Every division has an assigned observer who is tasked to take note of how the participants performed. When everyone has already settled in the muster point, headcount was then undertaken.

MGB RXIII employees diligently performed the earthquake drill to ensure that utmost consciousness, preparedness and response to disasters are achieved.

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MGB RXIII Geologists attend 2017 National Quadrangle Geological Mapping Workshop

A team of geologists from the Mines and Geosciences Bureau Regional Office No. XIII attended the 2017 National Quadrangle Geological Mapping Workshop on February 5-11, 2017 at Ninong’s Hotel in East Washington, Legazpi City.

The said workshop was hosted by the Mines and Geosciences Bureau Regional Office No. V. Mr. Romeo M. Dalodado, Chief Geologist; Melvin A. Mantilla, Supervising Geologist; Janeth S. Aparri, Geologist II; and Ralph Angelo B. Plaza, Geologist II of the MGB RXIII Geosciences Division participated in the workshop.

The first day was set for the deliberation, review and editing of the Geologic Quadrangle Maps of Region III. On the second day, lecturers discussed the geology of CALABARZON and Bicol Region. The lectures and workshop on quadrangle map generation and basic skills in geologic mapping were discussed on the third day and participants were given some exercises on aerial photo interpretation using the fieldwork site photos later in the afternoon. The fieldwork workshop within some areas in Albay was conducted on the fourth and fifth days.

The purpose of the workshop was to capacitate and prepare the participants for the upcoming quadrangle mapping in Bicol Region. The assigned quadrangle maps for MGB RXIII are Calolbon, Ligao, Polangui, Panganiran, and San Miguel quadrangles.


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MGB ROXIII carries on with its Groundwater Resources Assessment Program

The Mines and Geosciences Bureau Regional Office No. XIII conducted the Groundwater Resources Assessment on September 13 to October 8, 2016 in the Municipalities of San Miguel, Bayabas, Cantilan and Carrascal in Surigao del Sur.

A team of geologists and geologic mappers from the Geosciences Division of MGB ROXIII was divided into two groups to conduct Groundwater Resources Assessment in all 56 barangays of the four aforementioned municipalities.

Aside from well inventory, the team surveyed every water source in each barangay. Water source can be a well or a spring. General information like geology and geomorphology of the area was noted.  Similarly, the well construction data such as well usage, well type, drilling method and pump type as well as the spring and the rock type data were taken during the survey. The team took water samples of each major water source in all barangays for pH and alkalinity test. After the survey at the end of each day, the geologists conducted the pH and alkalinity tests on all water samples taken on that same day as the water samples should be analyzed within 24 hours.

To generalize the results of the tests, the pH for water samples mostly ranged from 6.16-7.91 while the total alkalinity ranged from 50-200. Water can be determined as acidic if the pH is below 7, while the basic is above 7. Another task for the team was the distribution of the 1:10,000 scale geohazard maps to all barangays of the Municipalities of San Miguel and Bayabas in Surigao del Sur. The geologists explained the components and usage of the geohazard map to the barangay officials present during the visit of the Geoscience Division team.


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MGB ROXIII conducts Vulnerability and Risk Assessment in Esperanza and Veruela, Agusan del Sur

The Mines and Geosciences Bureau Regional Office No. XIII conducted the Vulnerability and Risk Assessment (VRA) on September 19 to October 14, 2016 in the Municipalities of Esperanza and Veruela in the Province of Agusan del Sur.

A team of geologists and geologic mappers from the Geosciences Division of MGB ROXIII was divided into three groups to conduct the Vulnerability and Risk Assessment (VRA) in all barangays of the two aforementioned municipalities.

On September 19, 2016, the team paid a courtesy call on the Local Government Unit (LGU) – Municipal Disaster Risk Reduction Management Office (MDRRMO) and the Office of the Mayor of Esperanza to inform them that the MGB ROXIII team will conduct the Vulnerability and Risk Assessment. The Barangay LGU and the MGB ROXIII team also discussed the survey schedule.

Minor problems encountered during the survey were the transportation and accessibility of roads in distant sitios. After the assessment in 47 barangays and exit conference with the MDRRMO, the team proceeded to the Municipality of Veruela on October 5, 2016 to conduct the Vulnerability and Risk Assessment. The team coordinated with the Municipal Planning and Development Coordinator and MDRRMO Designate of Veruela who assisted the team in planning the schedule of survey in each barangay. Personnel from their office volunteered to guide the team in assessing the 20 barangays. In this municipality, the LGU also cooperated well in the activity. The VRA was completed by the GSD team right on schedule.

The Vulnerability and Risk Assessment is conducted by acquiring GPS readings of the important structures in the barangay such as day care centers, barangay hall, evacuation center, schools, etc. for the purpose of identifying the elements at risk in flood-induced hazards like landslide and flood. Purok centers and purok/barangay roads were also tracked. Residents were interviewed regarding the extent of flood depth in their purok. The type of house materials and means of transportation were also noted.

During the VRA activity in Esperanza, the team also distributed Information, Education and Communication (IEC) materials to all 47 barangays. The IEC materials included the 1:10,000 scale landslide and flood geohazard map, landslide/flood pamphlets and barangay demographic profile form. The geologists also explained to the barangay officials and staff the important details in the map.


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MGB ROXIII continues IEC Campaign of 1:10,000 scale geohazard maps

The Mines and Geosciences Bureau Regional Office No. XIII continued its Information, Education and Communication (IEC) Campaign of the 1:10,000 scale geohazard maps and the presentation of the highlights of the Results of the 1:10K Geohazard Mapping and Assessment in the Provinces of Agusan del Norte, Agusan del Sur and Surigao del Norte from July to August 2016. A total of two hundred fifteen (215) barangays, six (6) municipalities and two (2) cities were covered by the IEC Campaign on the following dates:

  1. Thirty-one (31) barangays of Cabadbaran City, ADN – July 14-15, 2016
  2. Twenty (20) barangays of Del Carmen, Siargao – August 1, 2016 Islands, SDN
  3. Twenty-nine (29) barangays of Dapa, Siargao – August 2, 2016 Islands, SDN
  4. Nineteen (19) barangays of General Luna, Siargao – August 3, 2016 Islands, SDN
  5. Fourteen (14) barangays of Socorro, SDN – August 4, 2016
  6. Forty-three (43) barangays of Bayugan City, ADN – August 11-12, 2016
  7. Twenty-seven (27) barangays of San Francisco, ADN – August 19, 2016
  8. Thirty-two (32) barangays of Prosperidad, ADS – August 20, 2016

Municipal/City Mayors, Provincial/City Disaster Risk Reduction Management Officers, Key Officers, Members of the Municipal/City Disaster Risk Reduction Management Council and Barangay Captains or Representatives of the above-mentioned areas were among the participants during the IEC.

The main purpose of the IEC was to provide the Barangay LGUS with 1:10,000 scale geohazard maps and present the highlights of the Results of the 1:10K Geohazard Mapping and Assessment. Considering the increasing occurrence of natural disasters, the said IEC fostered and intensified collaborative efforts among the national and local governments and communities to ensure that utmost consciousness, preparedness and response to disasters are achieved.

iec_1Mr. Romeo M. Dalodado, Geosciences Division Chief of MGB ROXIII informed the participants that MGB will not only distribute the 1:10,000 scale geohazard maps to LGUs but the Office will also conduct lectures and map reading exercises. He explained the importance of geohazard maps especially on the part of Bottoms Up Budgeting for LGUs considering that the Department of Budget and Management (DBM) required LGUs to secure a Geohazard Certification for any proposed government projects from MGB prior to the release of its funds/budget. He added that a geohazard map could be used as a tool for selecting areas to be developed as relocation/evacuation site and could be used in integrating disaster risk reduction and climate change adaptation initiatives in development/land use plan of barangays, municipalities and cities.

The highlights of the Results of the 1:10,000 scale Landslide and Flood Assessment of the municipalities/cities during the IEC Campaign were presented by the following geologists: Ms. Liza T. Pacete – Cabadbaran City, Agusan del Norte and Del Carmen, Siargao Islands, Surigao del Norte; Mr. Ralph Angelo E. Plaza – Cabadbaran City, Agusan del Norte and Dapa and General Luna, Siargao Islands, Surigao del Norte; Mr. Melvin A. Mantilla and Ms. Kate A. Boquilon – Socorro, Surigao del Norte; Ms. Elaine L. Galido – Bayugan City, Agusan del Norte and San Francisco, Agusan del Sur and Ms. Rubenar L. Cagubcob – Bayugan City, Agusan del Norte and Prosperidad, Agusan del Sur.

Recommendations suitable for areas assessed were discussed and provided by MGBRO XIII in the Landslide and Flood Threat Advisories of each barangays.

Engr. Esperidion Y. Amper, Jr, SRS I/ICT Focal Person, gave a lecture on how to read and interpret 1:10k scale geohazard maps for M/BLGUs preparedness and awareness of dealing with rain induced hazards in their respective areas. Prior to the distribution of 1:10K geohazard maps per quadrangle per barangay, the participants were required to take part in an actual workshop demonstration to gauge how well the participants have learned about map reading.

Ms. Cecilia L. Consuegra, Chair of the Regional Gender and Development Focal Point System, gave a brief discussion about Demographic Profiling. She requested the M/B DRRMO to help the GAD team gather the Demographic Profile of their respective barangays/ municipalities to be incorporated in the geohazard maps. She also stated that gender perspective will be integrated in the geohazard mapping and assessment.

On the same note, the MGB ROXIII GSD IEC team distributed Information, Education and Communication (IEC) materials regarding landslide, flood, storm surge and other geologic hazards. Apart from intensifying public awareness of natural hazards, the said materials will also aid in the effective and efficient management of disasters and reduction of casualties and damages to lives and properties.

The MGB ROXIII GSD IEC team acknowledged the all-out support given by the Provincial/City Disaster Risk Reduction Management Officers, Municipal/City Mayors, Members of the Municipal/City Disaster Risk Reduction Management Council and Barangay Captains or their representatives of the Cities of Cabadbaran and Bayugan, Agusan del Norte and the Municipalities of Del Carmen, Dapa, General Luna and Socorro, Surigao del Norte, San Francisco, Agusan del Norte and Prosperidad, Agusan del Sur for the successful conduct of the MGB ROXIII Information, Education and Communication (IEC) Campaign.
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MGB ROXIII conducts Coastal Geohazard Mapping and Assessment

After the completion of the geohazard mapping and assessment of landslide and flood-prone areas, the Mines and Geosciences Bureau is now conducting the geaohazard mapping and assessment of the country’s coastal areas. A team of geologists and mapper from the Geosciences Division of MGB Regional Office No. XIII conducted the Coastal Geohazard Mapping and Assessment from July to August 2016 in southern coastal municipalities in the Province of Cebu as assigned by MGB Central Office.

coastal_2The fieldwork was divided in two phases. Five municipalities were covered during Phase 1 which was conducted from July 6-25, 2016 while four municipalities were covered during Phase 2 which was carried out from August 11-30, 2016. During the 1st phase of the fieldwork, the team assessed the coastal municipalities of Boljoon, Oslob, Santander, Ginatilan and Malabuyoc. The coastal areas in the Municipalities of Alegria, Badian, Moalboal and Alcantara were surveyed during the 2nd phase of the fieldwork.

The Coastal Geohazard Mapping and Assessment was conducted by mapping the shoreline through a handheld Global Positioning System (GPS) device. Beach profiling was also undertaken to determine the morphology of a beach and to compare beaches or coastlines in different locations. In the same way, evidence of erosion such as exposed roots of vegetation as well as eroded roads and infrastructure in the area was noted. The locals were interviewed to gather anecdotal records and typhoon history of the area as well.

The Coastal Geohazard Mapping and Assessment Program will give the public substantial information on coastal areas or shorelines that are experiencing erosion or prone to erosion and accretion. The said program aims to provide vital information to policymakers and the public in order to make them understand the risk of hazards, enhance preparedness, reinforce response, foster resilience and minimize the adverse impacts of disasters. On the same note, the output of this program serves as an important reference in adaptation and crafting land use, coping mechanisms and development and management plans of affected communities and stakeholders.

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High 29° / Low 24°
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Mga Pagkulog at Pagkidlat . Mataas 29celsius. NE na hangin sa 10 hanggang 15 kilometro kada oras. Uulan 90%.
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High 29° / Low 24°
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