A preliminary study of geothermal resources in the Rokan Hulu Regency, Riau, Indonesia

Abstract

Renewable energy is a must in the future. One of them is produced from the geothermal resources. A preliminary study has been done on the geothermal resources in the Rokan Hulu Regency, Riau, Indonesia. In this study, the Google Earth Pro 7.3.1.4507 has been used to map the possibility of the source of groundwater in supplying the hot springs. The 2D geoelctrical resistivity survey with Wenner configuration has been conducted to image the subsurface around the hot springs. The Google earth shows that the water resource of the hot springs is predicted from the highland in southwest part of the study area. The highland is spread from several meters to about 8 km from the hot springs. This area is consisted of the igneous rock with elevation from 100 to 911 meter above mean sea level, whilst the hot spring is located at the elevation of 86 meter above mean sea level. Resistivity values show the possibility path of the groundwater seeping from the rock fractures through the hot rocks of igneous rock to the hot springs. However, the detailed study needs to be conducted to investigate the geothermal resources of the study area.