Analisis Geomorfologi Daerah Tulakan Dan Sekitarnya Kabupaten Pacitan

Fadil Fatur Rahman, Harnani Harnani

Abstract


The Tulakan area, Pacitan Regency, exhibits a complex landscape formed by the interaction of endogenous processes, including tectonic activity and andesitic magma intrusion, with exogenous processes such as weathering, erosion, sedimentation, and karstification. This study aims to identify geomorphological units, analyze their morphology, morphometry, and morphogenesis, and evaluate the influence of lithology and geological structures on landscape development. The study employed an integrated approach combining Digital Elevation Model (DEM) interpretation, morphometric and drainage pattern analyses, geomorphological mapping, lithological and structural geological analyses, and field verification. The results identified five major geomorphological units: Fault Block Ridges (approximately 30%), Moderately Eroded Denudational Hills, Intrusive Hills (approximately 5%), Karst Hills, and fluvial landforms represented by meandering channels, point bars, and floodplains (approximately 10–12%). Lithology primarily controls the development of karst and fluvial landforms, whereas geological structures govern the orientation and distribution of Fault Block Ridges and Intrusive Hills. These findings indicate that the geomorphological evolution of the Tulakan landscape is controlled by the interaction between tectonic and geomorphic processes, providing a scientific basis for geological hazard mitigation, environmental management, and sustainable regional planning.


Keywords


Geomorphology; Lithology; Geological Structures; Morphometry; Geomorphological Units

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DOI: https://doi.org/10.37905/geojpg.v5i1.39199

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