Flood risk analysis considering power loss and consumer functionality: A case study in Surigao City, Surigao del Norte

• Main Author: Macadamia, Kristeen Mae L.
• Format: text
• Language: English
• Published: Animo Repository 2018
• Subjects: Floods > Philippines > Surigao City; Engineering
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/2926
• Institution: De La Salle University

Surigao City is one of the wettest areas in the Philippines according to the Department of Tourism (2015), thus it is a flood-prone area. Flood is a natural hazard that puts people at risk, which could be translated into a loss in monetary value. The households that are affected by flood incur losses in functionality, such as losses in structure, contents and the loss they incur due to the inconvenience brought about by the outage due to flood. Meanwhile, the power producer, which is SURNECO, is not diretly affected by flood at all as it is located at a higher elevation compared to the households. However, it is indirectly affected as it incurs loss in revenue due to a decrease in the number of costumers during flood, leading to lower energy consumption. To address these flood losses, the researcher used geographic information system (GIS) software to quantify the number of affected households, and conducted a residential survey to gather information on the previous flood experience of the households. This study, however, is only limited to barangays San Juan, Washington and Taft as these are the busy districts of the city, and it is only focused on residential households and the flood is assumed to be static only. The return periods of flood used in this research are 2, 5, 10, 25 and 50 years. Based on the GIS analysis, the number of affected households for 2, 5, 10, 25, and 50 year return period flood is 2439, 4179, 4532, 5004, and 5329, respectively. Whereas, in the residential survey, the average cost of content damage, structural damage and the inconvenience caused by the outage per hour, irrespective of the location, is Php4,829, Php14,082, and Php584, respectively. Hence results show that the power loss, or the loss in revenue incurred by the SURNECO during extreme floods, ranges roughly from Php16,000 to Php114,000. On the side of the households, the content loss possibly ranges from Php16 million to Php25 million, the possible structural loss of the cosumers ranges from Php48 million to Php75 million, while the consumer loss, or the loss due to the inconvenience brought by the outage, ranges from Php96 million to Php67 million. Thus, the possible total loss of a household during extreme flood ranges from Php46,000 to Php145,000. Therefore, the value of these flood losses is significant to both SURNECO and households.