Geomorphological mapping and landform characterization of Semeru volcano after the eruption in 2021

Abstract The eruption of the Semeru volcano in 2021 has diverse impacts on landscape and surroundings. It is essential to detect recent features promptly evacuate personnel property near take emergency treatment measures case sudden danger. This study presents a detailed geomorphological map 1:50.000 scale for after 2021. analysis hybrid approach on-screen image interpretation (OSII) method DEM data, optical satellites, lithology units was carried out obtain morphological, morphochronological, morphoarrangement information. While, morphoprocess information obtained through field observations. We used DAS Rejali our area. results identifying conditions divide watershed area into 32 landforms consisting landform from volcanic, structural, fluvial, marine processes. Twenty-three land research location are volcanic condition causes morphological conditions, material availability, processes that dominantly reflect characteristics an active volcano. In addition, fluvial process were identified as many six form floodplains lahar flows along main river. Landforms with structural genesis placed Mandalika formation diorite rock breakthrough. retention structures not easily eroded by water. becomes bottleneck barrier between upstream middle areas