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Utilization of local energy in meeting rural electricity needs, primarily from renewable energy, is a mandate of the Electricity Law. One of the abundant renewable energies in Papua is hydro energy, as evidenced by the potential for hydro energy in Papua which reaches 36 GW. The Mining and Energy Office of West Papua province has undertaken the preparation of a Feasibility Study for the Kali Ombak Micro-hydro Power Plant in Maybrat Regency due to the electrification ratio, which is still below the national average, and the inaccessibility of the PLN grid in the near future. The objectives of this research are to collect information for the construction of the Kali Ombak Micro-hydro Power Plant in Maybrat Regency and the investment cost needed. There is a novelty is the penstock passes over the river and not many constructions like this are found. The target is to have 3 villages with electricity, namely Kampung Seni, Kampung Kuroso, and Kampung Ossom with 102 potential beneficiaries of housing and public facilities. The stages in this feasibility study include desk studies and field surveys supported by topographic and hydrological surveys. With a head of 6.85 meters and a measured instantaneous discharge using a current meter of 2.2 m3/s and 0.8 m3/s, respectively, the potential power for generation is 35 kW. The investment cost for the construction of the Kali Ombak Micro-hydro Power Plant reaches Rp. 3,379,746,000 with the largest composition of civil works cost, which is 60.34%. [ABSTRACT FROM AUTHOR]

According to geological and geochemical assessments, the Bittuang area possesses geothermal potential, which is suggested by the presence of geothermal surface manifestations such as hot springs, warm ground, and fumarole. Therefore, this study using the gravity method was carried out with the aim of proving the existence of a subsurface fault structure along the manifestation. The gravity data used in this study is secondary data from the Gravity Model Plus (GGMplus) satellite data obtained from the GGMplus satellite data in the form of gravity disturbance with 200-meter resolution. This data is used to create the Complete Bouguer Anomaly (CBA) map, regional map, and residual map. To analyze the presence of the fault structure, six cross-section line which crosses the Fault structure according to the geological map is drawn over the residual map. To make validate each crossing point in this study uses the First Horizontal Derivative (FHD) is used to show the edge of a discontinuity plane in the form of a geological structure boundary that causes an anomaly and the Second Vertical Derivative (SVD) analyses determine the presence of the fault structure boundary along with the hanging-wall and foot-wall of the plane of the fault structure. The results of this gravity research and the remaining anomaly data were used to digitally transform the SVD analysis on six tracks. The six digitized paths identified several correlated fault structures based on geological data. [ABSTRACT FROM AUTHOR]