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MORFOTEKTONIK DAS CITARIK HULU KAITAN DENGAN TATA GUNA LAHAN, DI WILAYAH CICALENGKA, KAB. BANDUNG Mochamad Aufar Muttaqin; Murni Sulastri; Nana Sulaksana; P Paramarta Raditya Rendra
Journal of Geoscience Engineering & Energy (JOGEE) VOLUME 3, NOMOR 1, FEBRUARI 2022
Publisher : Universitas trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1485.311 KB) | DOI: 10.25105/jogee.v3i1.12986

Abstract

The Upper Citarik sub-watershed area is part of the Citarum watershed. Most of the surrounding land is used as agricultural areas, gardens, rice fields, forests, and settlements. With most of the people working as farmers, it causes land degradation due to agricultural extensification. Because the Cicalengka area is estimated to be the final part of the Lembang Fault, and an area that has experiencing changes of land use, this study aims to examine the relationship between the morphotectonic aspects of the Upper Citarik watershed and land use around the Citarik River. The approach used to identify morphotectonic influences in the research area is the analysis of the ridge lineament pattern as well as geomorphic analysis in the form of bifurcation ratio (Rb), drainage density (Dd), mountain front sinousity (Smf), and valley floor width to height ratio (Vf). The dominant pattern of ridge lineaments in the study area is northeast-southwest, resulting in mountains oriented northwest-southeast. The average Rb value is 3.64, Dd ranges from 0.25-10, Vf with an average of 0.62, and the Smf value ranges from 1.11-1.64 in the north and 1.3-2.39 in the south. It can be interpreted that the tectonic activity of the surrounding area is classified as moderately active tectonic, and there are differences in tectonic classes between the northern and southern parts.
AKTIVITAS TEKTONIK RELATIF BERDASARKAN INDEKS GEOMORFIK DAERAH TANGKAPAN AIR CIHAUR KABUPATEN BANDUNG BARAT PROVINSI JAWA BARAT: RELATIVE TECTONIC ACTIVITY BASED ON GEOMORPHIC INDICES OF CIHAUR WATER CATCHMENT AREA WEST BANDUNG REGENCY WEST JAVA PROVINCE Anggito Saputra; Murni Sulastri; Nana Sulaksana; P Paramarta Raditya Rendra
Journal of Geoscience Engineering & Energy (JOGEE) VOLUME 3, NOMOR 2, AGUSTUS 2022
Publisher : Universitas trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1521.965 KB) | DOI: 10.25105/jogee.v3i2.13631

Abstract

The Cihaur watershed is one of the interesting areas for study about morphotectonic. This area is an earthquake-prone caused by subduction zone and active fault. The methods used in this study are: lineament analysis, morphotectonic, and associate of lithology and tectonic activity. The lineament analysis show that the ridge lineament pattern of study area is dominantly oriented West-East, following to structural pattern of Java. The morphotectonic analysis used three geomorphic index: basin asymmetric factor (Af), valley width-to-high ratio (Vf), and mountain front sinuosity (Smf). Then all the geomorphic index calculated by average of five geomorphic indices became index of relative tectonic activity (IATR). The study area was divided into four parts: 1st Class (very high tectonic, 13.14% in area); 2nd Class (high, 8.88% in area); 3rd Class (moderate, 46.21% in area); and 4th Class (low, 15.62% in area). This IATR result show that Cihaur watershed was controlled by moderate tectonic activity. The lithology of the study area is divided into: volcanic rock, sedimentary rock, and lake sediment. Association with tectonic activity shows that sedimentary rocks were highly tectonic-very highly tectonic, the volcanic rocks were moderately tectonic-highly tectonic, and lake sediment was low tectonic.