Taking the advantage of Participatory Geographic Information System (P-GIS) in validating Semeru disaster prone area map in Oro-Oro Ombo, Lumajang

Abstract

Desa Oro-Oro Ombo is located on the south-eastern flank of Semeru Volcano. It sits in a disaster-prone area (KRB) level I, II, and III due to the high possibility of being impacted by volcanic ash fall and lahar flow. However, the 1996 KRB map is no longer relevant because the impact of the 2021 Semeru eruption expanded more than expected. As a result, it increased the hazard and vulnerability of the village in the future. Therefore, it is crucial to generate the post-2021 KRB map and study the community’s perspective and knowledge about it. This research adopted a qualitative approach for data-gathering, i.e., in-depth interviews with key informants and the P-GIS methods. Interviews were conducted with the representative of BPBD Lumajang, coordinator of Semeru observatory station, coordinator of lahar flow observatory station, representative of local government, and impacted inhabitants. Meanwhile, P-GIS was applied to validate the KRB map. The study found a difference in the KRB coverage due to the deviation of the village administration boundaries. This research then produced a validated post-2021 Semeru eruption KRB map that can be utilized as the basis for further volcanic disaster risk management of Oro-Oro Ombo. According to the result the current map is going to reform the knowledge towards the recent hazards and risks.