Application of remote sensing and GIS for temporal dynamics of land use and land cover changes in 2013-2018 for watershed protection

In the past decade, various environmental problems have emerged related to land resources. The facts show that the rate of degradation of land resources and the decline in environmental quality in Indonesia have recently increased and have not shown signs of decline. The degradation of land resources and environmental quality need to be taken seriously so that increasingly serious environmental problems can be avoided. The purpose of this study is to determine the temporal dynamics of watershed land cover in Sinjai Regency and analysed the effect of land cover changing on the in protection function index of the Sinjai watershed in the year 2013 to 2018. Research was using quantitative research. This research is closely related to the enumerative induction process (induction based on calculations). The main causes of landslides in Sinjai Regency consist of rainfall, slope, and land cover. Part of the level of potential landslides based on rainfall is divided into low classes with a range of 2000-2500 mm rainfall, areas scattered in Sinjai Bulupoddo Regency, North Sinjai, parts of North Central Sinjai Regency and Northeast Sinjai District. While the area is located in the class of landslide potential, namely in the range of rainfall 2500 mm - 3000 mm, the potential for the spread of northern Sinjai, West Sinjai, Central Sinjai Regency, Sinjai District, East, and South Sinjai.