| dc.description.abstract | Mount Merapi, located on the border of the Special Region of Yogyakarta and Central Java, is one of the most active volcanoes in Indonesia. Since 1548 the volcano has erupted 68 times. The Merapi eruption in 2010 with a scale of VEI 4, produced materials of different sizes, from small (finer) to large size (boulder). The volume of material produced is estimated at 140 million m3, equivalent to an eruption that occurred in 1822. The material has had an impact on several factors, one of the factors is morphological changes in rivers in the Merapi area. The morphological changes can be caused by the results of erosion and sedimentation processes due to pyroclastic flows and debris flows. In addition, the changes in river morphology can be caused by human activities, such as mining sand in a river channel. Monitoring changes in river morphology can be investigated with Digital Elevation Model (DEM) and remote sensing data. This study aims to determine morphological changes in rivers in the Mt. Merapi after the 2010 eruption and to determine a suitable sand mining capacity in the rivers on the Mt. Merapi area, especially in the Progo River. The research on river morphology changes is conducted by comparing the condition of rivers at different times. The data used are the 2012 DEM, the 2015 DEM, the results of digitization of Google Earth Pro and field surveys. To determine the capacity/volume of sand mining is done by field surveys and measurement of hydraulic parameters of the rivers. The output of this study is to determine changes in river morphology and suitable sand mining capacity in rivers in the Mount Merapi area. The target outputs are planned to publish in a Sinta indexed Journal (minimum Sinta 3) or a Scopus indexed proceeding or an International Journal. The proposed research is fundamental research. The results obtained can be used as input for the determination of river management policies in the Mount Merapi area, in the context of efforts to mitigate disasters caused by sediment. The level of Technology Readiness (Tingkat Kesiapan Teknologi (TKT)) of this study is TKT one (1) and the target TKT after the process / stage of the research is TKT two (2). | en_US |
