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| Titel |
Reconstructing the Tropical Storm Ketsana flood event in Marikina River, Philippines |
| VerfasserIn |
C. C. Abon, C. P. C. David, N. E. B. Pellejera |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 15, no. 4 ; Nr. 15, no. 4 (2011-04-26), S.1283-1289 |
| Datensatznummer |
250012752
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| Publikation (Nr.) |
 copernicus.org/hess-15-1283-2011.pdf |
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| Zusammenfassung |
| In September 2009, Tropical Storm Ketsana (local name: TS Ondoy) hit the
Manila metropolitan area (Metro Manila) and brought an anomalous volume of
rain that exceeded the Philippines' forty-year meteorological record. The
storm caused exceptionally high and extensive flooding. Part of this study
was a survey conducted along the stretch of the Marikina River, one of the
major rivers that flooded. Post-event resident interviews were used to
reconstruct the flooding in the absence of stream gauge data. Hydraulic and
hydrologic modeling were carried out to understand the mechanism that brought
the flood. Peak floods occurred at different hours along the river resulting
from the transmission of water from the main watershed to the downstream
areas. Modeled peak flood and flood timing coincided well with actual
observations except for downstream stations where actual peak floods were
observed to have occurred at a later time. Compounding factors such as other
flood sources and stream backflow could have caused this discrepancy.
Nevertheless, prediction of flood heights and the use of the known time lag
between the peak rainfall and the peak runoff could be utilized to issue
timely flood forecasts to allow people to prepare for future flooding. |
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