Hemeroby Index-based Geomorphodiversity Hotspot for Regional Geoconservation Selection: Study on Klaten Aspiring Geopark Didit Hadi Barianto (a*) Anugrah Aditya Insani (a) Moch Indra Novian (a) Pandu Wirabangsa (b)
a. Geological Engineering Department, Faculty of Engineering, Gadjah Mada University, Indonesia, Jl Grafika no 2 Bulaksumur, Yogyakarta
*) didit_geologi[at]ugm.ac.id
b. Bappedalitbang Kab. Klaten, Pemda II lt 2, Central Java Province, Indonesia
Abstract
The Geomorphodiversity Index is a type of quantitative geodiversity assessment that focuses on the critical evaluation of landforms within a specific area. Traditionally, it^s used to understand the relationship between urban development and land surface diversity, but its application in geoconservation is limited. Conversely, geodiversity hotspots have been developed to identify areas in need of geoconservation using various threat indices, including one based on the hemeroby index, which measures human disturbance on the landscape. This research aims to assess geomorphodiversity hotspots using the geomorphodiversity and hemeroby indices within the Klaten Aspiring Geopark, an area with significant pre-Tertiary landscapes surrounded by Quaternary volcanoes and Tertiary structural mountains. Data used includes DEM (Digital Elevation Model) and land use. DEM is processed to derive slope, aspect, valley depth, plan curvature, profile curvature, topographic positioning index, topographic wetness index, and topographic roughness index, measured by Rao^s Q diversity index. Land use data is converted into the hemeroby index. DEM derivatives are then summed and multiplied by the hemeroby index to generate the geomorphodiversity index. Results reveal that geomorphodiversity hotspots in Klaten Aspiring Geopark are concentrated in areas with high hemeroby indices, located along the Jogja-Solo corridor. Consequently, there^s abiotic landscape fragmentation between the northwest and southeast, separated by this corridor. This indicates the need for proper spatial planning-based management to address regional geoconservation in Klaten Aspiring Geopark.l
