Civil Engineering and Architecture 10(4): 1526-1537, 2022 http://www.hrpub.org DOI: 10.13189/cea.2022.100422 Small Farm Reservoir Suitability Analysis in Tarlac Province, Philippines Ermalyn DG. Galo College of Engineering and Technology, Tarlac Agricultural University, Philippines Received October 19, 2021; Revised December 17, 2021; Accepted January 21, 2022 Cite This Paper in the following Citation Styles (a): [1] Ermalyn DG. Galo , "Small Farm Reservoir Suitability Analysis in Tarlac Province, Philippines," Civil Engineering and Architecture, Vol. 10, No. 4, pp. 1526-1537, 2022. DOI: 10.13189/cea.2022.100422. (b): Ermalyn DG. Galo (2022). Small Farm Reservoir Suitability Analysis in Tarlac Province, Philippines. Civil Engineering and Architecture, 10(4), 1526-1537. DOI: 10.13189/cea.2022.100422. Copyright©2022 by authors, all rights reserved. Authors agree that this article remains permanently open access under the terms of the Creative Commons Attribution License 4.0 International License Abstract Small farm reservoir (SFR) suitability analysis is useful in water resources management and development assistance of government and non-government agencies for farmers and farmer-groups. The researcher utilizes the geographic information system to analyze the suitable areas for the construction and management of small water impounding to store and conserve rainwater in rainfed areas. The factors on rainfall, soil texture, slope, land use, irrigation status, groundwater availability and distance from river were considered for the suitability mapping of SFRs. The following factors have their corresponding weights which are derived from using the analytical hierarchy process (AHP) procedure. The testing of the model was done by determining the suitability value (S) of each sample SFR. The research findings showed the areas in the province potentially suitable for SFRs of the total land area of Tarlac: 47% are not suitable, 25% are marginally suitable, 13% are moderately suitable and 15% are highly suitable. Keywords Suitability, Small Farm Reservoir, Geographic Information System, Rainfed Areas, AHP 1. Introduction The Philippines has 41% total rainfed cropped area that mostly relies on rainfall; however its availability is lesser in dry season (Moya et al., 1994). In addition, development of facilities for conventional irrigation is unlikely because of undulating topography, surface drainage and monetary constraints. Rainfed farmers suffer frequently from drought because of the inadequate water together with poor management practices of irrigation water. To mitigate the effect of drought in these areas, farmers with small farms are collecting rainfall and runoff and storing rainwater in small farm reservoir to be used for the wet and dry season crops (Guerra et al., 1994). Small farm reservoir (SFR) is an earth dam structure used to harvest and store rainfall and runoff for irrigation. It is the smallest version of small water impounding project with an embankment height of less than 4 meter (Ines et al, 2018). Studies showed that small farm reservoirs (SFRs) serve as an economically viable means for storing and conserving rainwater to lessen the effect of drought and cropping intensification in rainfed drought-prone areas. However, information about this technology is very limited making a hindrance to researchers, technical implementers and government agencies in utilizing its maximum potential in rainfed areas. Generating information system about SFRs with the aid of geographic information system (GIS) technology can be used as a basis for areas suited for SFRs as an effective water management scheme for individual farmer and farmer groups to improve crop production. Furthermore in the water resources development planning strategies of the government for the national, regional and local levels, as GIS has often used for the geographic concerns on agriculture. Thus, the objective of the study was to generate suitability maps for SFR construction in the province of Tarlac.