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National Committee on Marine Sciences (NCMS)

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    Geomorphological and sedimentological records of recent storms on a volcaniclastic coast in Bicol, Philippines
    Soria, Janneli Lea A.; Switzer, Adam D.; Pile, Jeremy; Siringan, Fernando P.; Brill, Dominik; Daag, Arturo (Elsevier, 2021-08-01)
    Typhoon Durian in November 2006 was most notable for a series of devastating lahars that buried communities at the base of Mayon volcano in Bicol, Philippines. Typhoon Durian delivered extreme rainfall that remobilized volcanic debris that caused more than ~1200 deaths and extensive property damage. Although not as deadly as the lahar, Typhoon Durian also generated a storm surge that caused localized dune breaching on Malinao barrier sand spit in Lagonoy Gulf. In the absence of instrumental data of the storm surge, we used the geomorphical and sedimentary imprints including erosion scarps, washover fans and terraces to infer the inundation heights on the barrier spit. The surface elevations of washover fans, terraces and relic dunes indicate inundation heights above 1.5 m but not exceeding 3 m. Typhoon Durian's overwash deposit is characterized by typical washover fan stratigraphy, and exhibits horizontal to sub-horizontal lamination on the front to mid-fan and foreset stratification near the fan terminus. Subsurface stratigraphy using shore-normal ground penetrating radar (GPR) imaging reveals at least two buried erosional surfaces farther inland from the erosional surface of Typhoon Durian. Similar to Durian, the older erosional surfaces were probably sustained from previous typhoons. We infer that episodic erosional events most likely have repeatedly disrupted the prograding development of the Malinao barrier spit. Typhoon Durian highlights the exposure of volcanic landscapes to multiple hazards from cyclone landfall.
    This work comprises Earth Observatory of Singapore contribution no. 169. This research is supported by the Singapore National Research Foundation fellowship scheme (Grant No: NRF-RF2010-04) and the Singapore Ministry of Education under the Research Centres of Excellence initiative. This paper is a contribution to IGCP Project 639 Sea-Level Changes from Minutes to Millennia. We thank German Gonzaga of the Malinao Local Government Unit who facilitated our access to the study site. We also appreciate Cabria family for being our hospitable host during the series of field campaigns. We thank Mr. Raul Capistrano on behalf of NAMRIA for providing tide gauge data, and the Mines and Geosciences Bureau for granting us permit to transport sediments. We are grateful to Joan Reotita, Ronald Lloren, Yo Muan, Lester Valle, Arlene Tengonciang, Mabelline Cahulogan, Ariel Malonda, Antonio Ceres and Elmer Cas for their generous help in collecting field data.
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    Karding aftermath: Veggie, fish, rice prices to go up 20%
    Campos, Othel; Araja, Rio (Philippine Manila Standard Publishing, Inc., 2022-09-30)
    Prices for vegetables, fish and even rice could shoot up by as much as 20 percent as a result of the damage wrought by super typhoon Karding, the Department of Agriculture (DA) warned Thursday. Agriculture Undersecretary Domingo Panganiban said in an interview that the country’s rice granary, Central Luzon, sustained severe damage during the typhoon, resulting in the loss of 20 percent of the standing crop.
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    Quinta' aftermath: Deaths, fishkill
    Locus, Sundy Mae T.; Romero, Maria; Wakefield, Francis T. (Concept & Information Group, Inc., 2020-10-29)
    Bureau of Fisheries and Aquatic Resources (BFAR) Region 5, meanwhile, reported an initial 20 metric tons of tilapia valued at P2.1 million were lost. BFAR-5’s Regional Fisheries Laboratory conducted water sampling in six villages — Iraya, Ibayugan, Tambo, Cabatuan, Salvacion and Sta. Elena. Results showed low dissolved oxygen (DO), ranging from 0.18 to 4.37PPM, and very high ammonia (ranging from 7.58 to 10,679 mg/L) content in Lake Buhi. Normal and tolerable ranges of DO are below 5PPM and ammonia at only 0.050 mg/L or lower.