The groundwater investigation in Papua New Guinea is a complex task due to the hard rock terrain structure. To overcome this complexity, the integrated approach based on advanced applications of remote sensing and Geographical Information System (GIS) lends itself to evaluate groundwater prospective zone based on multicriteria decision making approach (e.g. geomorphology, lithology, soil type, elevation, land slope, drainage density, inundation type, land use and vegetation). A probability weightage index overlay method was adopted that allows a linear combination of probability weights of each thematic map with the individual impact value using Bayesian statistics. These capability values are then multiplied with the respective probability weight of each thematic map. Analysis of groundwater potential zones shows that the very high groundwater potential zones constitute 4.29 % of the Morobe province. The regions were mainly comprises on some small pocket of north-eastern western region of the province. The hydrologic parameters-based groundwater potential zone map also indicated, 15.71 % of the study area was classified as having high potential, 37.16 % moderate potential and 42.84 % low potential. This study also provides a methodological approach for an evaluation of the water resources in hard rock terrain and enables an opening of the scope for further development and management practices
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