CP David
Carlos Primo C. David
National Institute of Geological Sciences
University of the Philippines College of Science, Diliman, Quezon City
Tel. No.: 9243077 Email address: cpdavid@nigs.upd.edu.ph/cp.david@yahoo.com
Indexed papers in: http://up-diliman.academia.edu/CPDavid
PRC License # 0001272 (Geologist)
Dr. CP David is a licensed geologist and professor of Geology and Environmental Science in UP Diliman. A project leader of the Department of Science and Technology’s Project NOAH, Dr. David pioneers short term rainfall forecasting in the country and climate change-related research on water resources. He concurrently serves as DOST’s spokesperson for Climate Change and a resident resource person for disaster preparedness for GMA News and Public Affairs. Dr. David is a member of the Panel of Experts (PoE) of the Climate Change Commission and was the 2013 awardee of the Oscar M. Lopez Professorial Chair for Climate Change Research.
National Institute of Geological Sciences
University of the Philippines College of Science, Diliman, Quezon City
Tel. No.: 9243077 Email address: cpdavid@nigs.upd.edu.ph/cp.david@yahoo.com
Indexed papers in: http://up-diliman.academia.edu/CPDavid
PRC License # 0001272 (Geologist)
Dr. CP David is a licensed geologist and professor of Geology and Environmental Science in UP Diliman. A project leader of the Department of Science and Technology’s Project NOAH, Dr. David pioneers short term rainfall forecasting in the country and climate change-related research on water resources. He concurrently serves as DOST’s spokesperson for Climate Change and a resident resource person for disaster preparedness for GMA News and Public Affairs. Dr. David is a member of the Panel of Experts (PoE) of the Climate Change Commission and was the 2013 awardee of the Oscar M. Lopez Professorial Chair for Climate Change Research.
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which resulted in increased erosion of contaminated sediments. Significantly high concentrations of MeHg were found in two subbasins (Acupan and Lucbuban) in 2001 and four subbasins (Acupan, Dalicno, Sangilo, and Upper Ambalanga) in 2003. The high MeHg may be driven by the enhancement of the methylation process in areas with large amounts of finegrained sediments that accumulated in lower hydrologic gradient (and ensuing increased organic activity) close to and at some distance downstream from the point sources.
Design/methodology/approach – Manual rain gauges were installed in 20 houses of volunteers living within the Bicol River basin to monitor rainfall. Rain information is sent twice daily via SMS message to a receiving computer. The received data are used to run a basin model that was developed in HEC-HMS, which converts precipitation excess to overland flow and channel run-off.
Findings – Different watershed models were developed for different rainfall events. Geomorphic analysis using 3 s SRTM Digital Elevation Model (DEM) processed in a GIS platform was also done to refine the overland flow. The derived hydrographs were used in the HEC-RAS hydraulic model which has as main output threshold values for the rain-flood relationship.
Research limitations/implications – Although SRTM DEM that was used for the geomorphic analysis was sufficient for the purpose of the study, higher resolution DEMs can further improve the mapping of spatial extent of flood areas.
Practical implications – The results are used for the forecast of flood and the timely issuance of flood bulletins.
Originality/value – This study is the first to incorporate the involvement of the community in establishing a flood early warning system. The method can also be used as a prototype for other flood
models in other parts of the country.
of Marinduque, Philippines, on 24 March 1996.
Originating from the Marcopper Mine, tailings
sludge flowed down the Boac River abruptly and
during subsequent storm events. Most of the tailings
material has since accumulated in the nearshore
environment along the western coast of the island.
Nineteen sediment cores were collected from this
site and analyzed for heavy metals. Elevated
concentrations of Cu (706–3,080 ppm), Mn
(445–1,060 ppm), Pb (43–56 ppm), and Zn (131–276
ppm) are present in the tailings. Two horizons of
high metal concentrations in the marine sediment
profile are interpreted to correspond to two distinct
tailings input events. The lower horizon corresponds
to the original 1996 spill, whereas the spike near the
surface is thought to be a combination of input due
to dredging of the river in 1997 and reworking of
sediments. A previous history of contamination is
also deduced from the metal profiles. The volume of
tailings material released into the marine environment
due to the spill is estimated to be 180,000 to
260,000 m3.