Research
RNEAR-REAL TIME FLOOD EXTENT MONITORING IN MARIKINA RIVER PHILIPPINES: MODEL PARAMETERISATION USING REMOTELY-SENSED DATA AND FIELD MEASUREMENTS
Jojene R. Santillan, Enrico C. Paringit, Roseanne V. Ramos Research Laboratory for Applied Geodesy and Space Technology, Training Center for Applied Geodesy and Photogrammetry & Department of Geodetic Engineering, University of the Philippines, Diliman, Quezon City, Philippines; Tel: +63-2-9818500 ext. 3147; E-mail: jrsantillan@up.edu.ph; paringit@gmail.com John Robert T. Mendoza, Nena Carina Española Grid Operations Team, Advance Science and Technology Institute, Department of Science and Technology, C.P. Garcia Avenue, Technology Park Complex, UP Campus, Diliman, Quezon City, Philippines; Tel: +63-2-4269760 Jen Alconis National Institute of Geological Sciences, University of the Philippines, Diliman, Quezon City, Philippines KEY WORDS: Flood extent monitoring, HEC RAS, ALOS AVNIR2, Marikina River, Philippines. ABSTRACT: Floods are a persistent problem in the Philippines that need to be addressed in a more scientific way in order to mitigate its costly impacts to human lives and properties. The September 2009 floods caused by Typhoon Ketsana that devastated Metro Manila and its surroundings exemplified the need for an accurate and reliable flood monitoring tool for determining the extents of floods and for assessing the risks due to this disaster. In this study, we developed and parameterized a near-real time flood extent monitoring model for Marikina River, Philippines using the Hydrologic Engineering Center – River Analysis System (HEC RAS) program. River bathymetric surveys and cross-section measurements were conducted to generate the geometry of the Marikina River required by HEC RAS. Flood plain surface roughness coefficients needed to parameterize the model were derived from multispectral classification of a 10-m spatial resolution ALOS AVNIR-2 of the study area. The HEC RAS model was configured to accept real time
Jojene R. Santillan, Enrico C. Paringit, Roseanne V. Ramos Research Laboratory for Applied Geodesy and Space Technology, Training Center for Applied Geodesy and Photogrammetry & Department of Geodetic Engineering, University of the Philippines, Diliman, Quezon City, Philippines; Tel: +63-2-9818500 ext. 3147; E-mail: jrsantillan@up.edu.ph; paringit@gmail.com John Robert T. Mendoza, Nena Carina Española Grid Operations Team, Advance Science and Technology Institute, Department of Science and Technology, C.P. Garcia Avenue, Technology Park Complex, UP Campus, Diliman, Quezon City, Philippines; Tel: +63-2-4269760 Jen Alconis National Institute of Geological Sciences, University of the Philippines, Diliman, Quezon City, Philippines KEY WORDS: Flood extent monitoring, HEC RAS, ALOS AVNIR2, Marikina River, Philippines. ABSTRACT: Floods are a persistent problem in the Philippines that need to be addressed in a more scientific way in order to mitigate its costly impacts to human lives and properties. The September 2009 floods caused by Typhoon Ketsana that devastated Metro Manila and its surroundings exemplified the need for an accurate and reliable flood monitoring tool for determining the extents of floods and for assessing the risks due to this disaster. In this study, we developed and parameterized a near-real time flood extent monitoring model for Marikina River, Philippines using the Hydrologic Engineering Center – River Analysis System (HEC RAS) program. River bathymetric surveys and cross-section measurements were conducted to generate the geometry of the Marikina River required by HEC RAS. Flood plain surface roughness coefficients needed to parameterize the model were derived from multispectral classification of a 10-m spatial resolution ALOS AVNIR-2 of the study area. The HEC RAS model was configured to accept real time
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