Effect of Geological Characteristics on Landslides and Floods in Karangtengah

Abstract

Bantul regency becomes an area that has a high potential for flooding in 2019 with each percentage of 27%, Bantul regency becomes an area that has a high potential for landslide disasters with a percentage of 43% or there has been a landslide as much as 220 times, landslide-prone points in Bantul districts are in some places there are 5 districts that are very vulnerable, one of the landslides and floods was in the Karangtengah village, research in this Karangtengah to see the most influential geological character as a trigger and cause of landslides and floods in the area of ??Karangtengah, The method used in this research is a field survey method assisted by GIS software, in field survey activities, by looking at the condition of the slopes, lithology on the slopes and structures that develop on the slopes, this analysis is carried out to determine the influence of geology on landslide disasters in the area. the upstream part which is the slope, while the analysis for the flood disaster is in the form of studies including infiltration at several points including residential areas and riverbanks and analysis of rainfall data, infiltration is carried out in the river boar area which is the downstream part, the geological aspects of landslides and floods in the Karangtengah area are quite dominant considering the results of the infiltration analysis, geomorphology and developing structures, besides the geological aspects of hydrometeorology and the use of a fairly large influence on the occurrence of the disaster.