ABSTRACT – Flooding is the most frequent disaster in Indonesia especially during the wet season. Wet season in Indonesia has a high level of rainfall. In addition to rainfall levels, flooding is affected by infiltration, slope and land cover. Land cover changes have a major role in flood disaster. This study aimed to determine affected flood areas and trying to obtain the relationship between flooding and land use changes in Lasolo watershed. Radar Sentinel-1 imagery year 2019 was used to analyze the differences in the appearance of during and before the flood event. In addition, a random forest method was carried out to detect changes in land cover for 19 years by using Landsat-5 imagery year 2000 and Landsat-8 imagery year 2018-2019. The results of this study indicate that flooding occurred in two sub-districts namely Lasolo and Asera with extensive inundation was about 4.284,72 Ha. In all flood-affected areas, the dominant land changes changed from plantations to forests (399,96 Ha) and forests became open areas (398,52 Ha). This analysis is urgently needed to manage spatial planning along the Lasolo watersheds in a sustainable manner including watershed management in terms of building urban resilience towards future flood disaster.