Potential and Risk Reduction of Geological Disasters (Case Study in Sabu Island, Raijua District – East Nusa Tenggara)

Sabu Island is one of the islands on the outer border line of The Indonesia Archipelago. The lack of detailed
geological data is a challenge in regional planning especially related the disaster risk reduction. The purpose of the study
is to understand the geological processes in Sabu Island as a part of Risk Reduction of Geological Disaster (RRGD). The
qualitative descriptive method is used to explore regional geological data to identify the important factors that influence
RRGD. The risk reduction for subsidence in karst morphology in East Sabu Districts and Middle Sabu Districts can be
synergized with local cultural and social-economic potential empowerment. Although, the historical data is insignificant
and the potential threat is evenly distributed in the Sabu Island area. The threat of a tsunami in the southern coastal area of
Sabu Island is greater than that of the north coast, especially in the coastal plain area. Potential liquefaction is in coastal
alluvial plains. The potential threat of landslides is primarily in the middle of Sabu Island. Understanding the regional
geological process is useful guide the GDRR.