SUITABILITY ANALYSIS FOR IDENTIFYING HOUSING LOCATION SITES IN TANDAG CITY, S.d.S. USING AHP AND GIS
- cristinamontenegro92
- Apr 1, 2021
- 3 min read
Updated: Apr 2, 2021
Natural disaster occurrence is increasing around the world (Kengpol, et al., 2013) and Philippines is one of the many countries that have been experiencing the brutality of this natural hazard. One example of the natural disaster is typhoon which rampantly enters the Philippine area of responsibility. As reported by PAG-ASA, the Philippine archipelago comprising of 7,107 islands is hit by an average of 20 typhoons each year and five of which are destructive (Quilang, 2011).
Tandag City Surigao del Sur is one of the areas in the Philippines that is struck by a typhoon on an average of one per year. It is located within the latitudes of 9o 8’15” to 9o 0’ 0”and 125o 52’ 00” to 126o 12’13” longitudes and facing the Pacific Ocean about 12,259kilometers southeast (City of Tandag, Philippines, 2013).
Tandag City life-threatening phenomena
Media reported that Tandag City residents experienced life-threatening phenomena, one of which occurred in September 2012wherein the PHILVOLCS issued a tsunami alert level 3 in Surigao del Sur after the 7.6 magnitude earthquake struck Samar (Mascariñas, 2012). Another is the tropical depression Queenie which was reported by PAG-ASA to have a landfall at Tandag City in November 2014. Due to this typhoon, two domestic flights were cancelled with route Manila to Surigao and vice versa. The heavy rains brought about by Queenie caused floods in low lying areas and landslides in some high-elevated areas in the city as well as in its neighboring municipalities (Locsin, 2014).
The National Disaster Risk Reduction Management Council (2014) reported that tropical depression Agaton which happened in January 2014 caused 40 deaths and enforced 138 families in the coastal barangays of Cantilan, Cortes and Tandag City to evacuate. Likewise, typhoons Caloy and Seniang struck Tandag City in March 2014 and December 2014 respectively as reported by PAG-ASA which resulted to death and destruction of properties (Tandag City Disaster Risk Reduction Management Council, 2014). Moreover, Nawal (2015) reported that heavy floods struck Tandag City in January 2015 which resulted to suspension of class and work both in public and private institutions.
Recently February 21, 2021 tropical storm Auring damaged at least 142 houses in Tandag City and other houses were submerged in the floodwater as reported by DSWD Caraga Field Office.
Suitability Analysis for identifying housing location sites in Tandag City
This research would like to help minimize the effects of natural hazards in Tandag City by conducting suitability analysis for identifying potential housing location sites. The suitability analysis will also consider other criteria such as geographical, zoning and accessibility. One of the methods in conducting this is through the use of Geographic Information System (GIS) based suitability analysis. This method uses the concept of Decision Theory (DT) specifically the Analytical Hierarchy Process (AHP). AHP is a decision making tool which is under multi-criteria decision making (Chen et al. 2013).
This study aimed to identify suitable housing location sites in Tandag City. Particularly to generate a map for suitable housing sites in Tandag City using GIS and weight of each criteria.
The result of this research will help the Tandag City government particularly to assist the Tandag City Development Office (TCDO) in determining the suitable housing location sites of the informal settlers in the coastal areas of Tandag City. The result can also aid the city government of Tandag in assisting the investors locate the suitable sites for potential housing projects. Moreover, it will also help the City Disaster Risk Reduction Management Council (CDRRMC) in monitoring evacuation plans from natural disasters that may save budget for relief and rehabilitation. It may also serve as a basis for planning future urban expansion.
Comments