Disclaimer UN Office for the Coordination of Humanitarian Affairs To learn more about OCHA's activities, please visit. The RDANA is a joint undertaking by the Office of Civil Defense (OCD) and Humanitarian Country Team, under the overall leadership of Region II OCD. A Rapid Damage and Needs Assessment (RDANA) was conducted from 19 to 21 November in the provinces of Cagayan and Isabela to understand Vamco’s impacts and the affected people’s needs. J Sens 2017:1353691.On 11 November 2020, Typhoon Vamco/Ulysses lashed the main island of Luzon whipping destructive winds and dumping heavy rainfall that triggered massive flooding in several areas including, Region II (Cagayan Valley), which was one of the most severely affected. 08 November 11, 2020, 2020 Season, TY Ulysses Issued by: David Michael V. Xue J, Su B (2017) Significant remote sensing vegetation indices: a review of developments and applications. 3 Wednesday afternoon due to 'Ulysses', the country’s 21st tropical cyclone this year, which. USGS (2020) What is remote sensing and what it is used for? MANILA, Philippines Several areas in Luzon were placed under Tropical Cyclone Wind Signal No. 29 re Preparedness measures and effects for Typhoon “ULYSSES” (I.N. National Disaster Risk Reduction and Management Council (2021) Sitrep No. Raviz J, Raviz J, Mabalay M, Laborte A, Nelson A, Holecz F, Quilang EJ, Barbieri M, de Dios J, Collivignarelli F, Gatti L, Rala A, Garcia C, Mabalot P, Mirandilla J, Doverte M (2015) Mapping rice areas in Mindanao using the first images from Sentinel-1A: the prism project experience PSA (2019) 2019 Regional social and economic trends, Philippine Statistics Authority Regional Statistical Services Office II PAGASA (2020c) Tropical cyclone information. PAGASA (2020b) Tropical cyclone associated rainfall. Ochave RD (2020) Dismal fourth-quarter farm output expected. NIA (2021) NIA reaffirms that recent flooding in Cagayan Valley is not wholly attributed to Magat Dam. ARSET-Agricultural Crop Classification with Synthetic Aperture Radar and Optical Remote Sensing|NASA Applied Sciences. NASA (2021) Part 1: Synthetic Aperture Radar (SAR) refresher. Miraflor MB (2020) Typhoon Ulysses’ damage to the agriculture sector at P12.8-B-DA-Manila Bull. In: IOP conference series: earth and environmental science, The 1st UPI International Geography Seminar. Maryati S (2018) Mitigation using geospatial approach (A case study in Bone Bolango Regency, Gorontalo Province). Macaraeg P (2020) 3 Issues that need to be addressed in Cagayan flooding. Israel DC (2013) Impacts of natural disasters on agriculture, food security, and natural resources and environment in the Philippines. ĮSA (2020b) Sentinel-2-Missions-Sentinel Online-Sentinel Online. ĭrisya J, Kumar S, Roshni T (2018) Chapter 27-Spatiotemporal variability of soil moisture and drought estimation using a distributed hydrological model (Integrating Disaster Science and Management)ĮSA (2020a) Sentinel-1-Missions-Sentinel Online-Sentinel Online. IOP Conference Series: Earth and Environmental Science 381(1):012010. ![]() īeshentsev AN, Borisova TA (2019) Flood monitoring using GIS technologies: a case study of the Selenga River basin. īernardo J (2020) What causes severe flooding in Cagayan province?|ABS-CBN News. KeywordsĪsian Disaster Reduction Center (2021) Information on disaster risk reduction of the member countries. It was also noted that before the typhoon, most of the rice crops were at a stage of maturity and were ready for harvest a few days later. This was determined using MODIS, Sentinel 1 and 2, and a 0.3 NDVI threshold. Results showed that the standing crops I n Alcala increased after the typhoon (from 660.55 to 923.16 ha) when the flood subsided. More than 35,000 ha of rice areas were flooded in Alcala town. ![]() The significantly high amount of rainfall (200–300 mm) received, low elevation and slope of the affected areas, and the volume of water released from Magat Dam were noted as the contributing factors to the massive flooding event. The VV polarization was found to be more suited for monitoring vegetation, whereas the VH polarization is more suited for estimating flood extent, as based on the backscatter intensity of the two polarizations before and during flooding on representative places. The VH band was found more effective at detecting flooded and agricultural areas (72,722.30 ha and 37,736.70 ha, respectively) than the VV band (69,501.12 ha and 35,606.59 ha, respectively). ![]() The VV and VH bands of Sentinel 1 were used to detect the flooded areas before (November 1) and after (November 13) the typhoon. ![]() In this study, synthetic aperture radar images were used to analyze the effect of Typhoon Ulysses in the region. The Cagayan Valley Region was reported with the highest worth of damage to infrastructure and agriculture. Typhoon Ulysses (Vamco) brought about more than 300 flooding incidents in the Philippines in November 2020.
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