Public-access flood hazard mapping: The case of Brgy. Pansol, Calamba City, Philippines
Issue Date
6-2014
Abstract
Public-access flood hazard mapping was conducted in Brgy. Pansol, Calamba City, Philippines. This mapping approach ensures that the resulting information derived from the study are made accessible to the public. Flood hazard zones and features of interest are openly shared using tools that can be opened using the internet. The approach emphasizes the importance of public knowledge in relation to flood occurrence. One hundred two Points of Interests (POIs) were collected onsite using a calibrated Global Positioning System (GPS) unit and were made publicly available in the Open Street Map (OSM) website. Flood hazard mapping in Pansol, cross-validated by the acquired POIs, was done using GIS. To explain flooding in Pansol, spatial data such as elevation, land use, proximity to the lake, and proximity to streams were gathered from primary and secondary sources. These data were processed using geoprocessing tools with the aid of Analytic Hierarchy Process (AHP) to generate a flood hazard map (vector-based) delineated as follows: (1) not-prone; (2) low; (3) moderate; and (4) high flood hazard areas. Based on the result, 59.07 % (228.2 has) of Brgy. Pansol area was determined to have high hazard to flooding, while 10.30% (37.39 has) and 23% (88.5 has) have moderate and low hazard to flooding, respectively. The remaining 7.63 % (24.49 has) was not prone to flooding. Interviews with residents, resort owners, business establishment owners and barangay officials were done to identify the social perspective as to why flooding occurs in their locality, typhoons and rainfall events which caused flooding and specific areas which are most affected by flood. Findings suggest poor drainage system as one of the contributing factors to flooding aside from low elevation.
Source or Periodical Title
34th Asian Conference on Remote Sensing 2013, ACRS 2013
Page
3798-3807
Document Type
Conference Paper
Physical Description
maps, illustrations, tables, graphs
Language
English
Subject
Analytic hierarchy process, Brgy. Pansol, Flood hazard, Land use, Mapping
Recommended Citation
Paquit, J.C., de Guzman, C.B., Dida, J.J.V., Magnaye, G.E., Mapacpac, J.C.V., Roxas, R.R., Bantayan, N.C. (2014). Public-access flood hazard mapping: The case of Brgy. Pansol, Calamba City, Philippines. 34th Asian Conference on Remote Sensing 2013, ACRS 2013, pp. 3798-3807.
Digital Copy
yes