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Kembali| NIM (Student Number) | I1C006010 |
|---|---|
| Nama Mahasiswa | DIMAS PERMANA |
| Judul Artikel | GEOLOGI DAN ANALISIS POTENSI LONGSORAN DI DESA TIPAR DAN SEKITARNYA, KECAMATAN RAWALO, KABUPATEN BANYUMAS, PROVINSI JAWA TENGAH |
| Abstrak | Daerah penelitian terletak di Desa Tipar dan sekitarnya, Kecamatan Rawalo, Kabupaten Banyumas, Provinsi Jawa Tengah. Secara geografis daerah ini terletak pada koordinat 109° 8' 13.48" - 109° 10' 56.75" Bujur Timur dan 7° 30' 29.79" - 7° 27' 47.9124" Lintang Selatan. Berdasarkan fisiografis Jawa bagian Tengah, daerah penelitian berada pada Zona Pegunungan Serayu Selatan. Daerah penelitian terbagi menjadi 3 satuan geomorfologi antara lain: Satuan Perbukitan Struktural Karangendep, Satuan Lembah Struktural Karangmangu, dan Satuan Dataran Aluvial Tipar. Satuan batuan daerah penelitian terbagi menjadi 4 satuan tidak resmi, yaitu Satuan Perselingan Batupasir - Batulempung, Satuan Breksi, Satuan Batupasir, dan Satuan Endapan Aluvial. Umur pengendapan daerah penelitian berkisar antara Miosen Akhir – Pliosen Awal (N16-N19). Lingkungan pengendapan daerah penelitian berkisar di laut dalam (Satuan Perselingan Batupasir - Batulempung), zona batyal atas (Satuan Breksi), dan zona neritik (Satuan Batupasir). Struktur geologi daerah penelitian dipengaruhi pembentukan lipatan yang mengindikasikan aksi gaya utara selatan serta sesar mendatar mengiri Turun dengan arah NE-SW. Perhitungan kestabilan terhadap lereng menggunakan konsep kesetimbangan batas dengan Metode Bishop Disederhanakan. Berdasarkan perhitungan kestabilan lereng, didapatkan nilai faktor keamanan lereng daerah penelitian antara 2,32 (Lereng 1) yang merupakan lereng aman dan 0,993 (Lereng 2) yang merupakan lereng kritis. Konsep mitigasi dilakukan terhadap lereng kritis dengan cara pengaturan geometri, menerapkan dinding penahan lereng, dan pengaturan drainase lereng. |
| Abstrak (Inggris) | Research area is located at Tipar Village and its surroundings, Rawalo District, Banyumas Regency, Central Java Province. Geographically, this area is located at 109° 8' 13.48" - 109° 10' 56.52" East Longitude and 7° 30' 29.79" - 7° 27' 47.24" South Latitude. According to physiography of Central Java, research area is a part of South Serayu Mountains Zone. Research area can be divided into three geomorphological units, which are: Karangendep Structural Hills Unit, Karangmangu Structural Valleys Unit, and Tipar Alluvial Lowland Unit. Lithological units of research area are divided into four units, which are: Intercallation Unit of Sandstone-Claystone, Breccias Unit, Sandstones Unit, and Alluvial Deposits Unit. Ages of lithological units in research area are ranged from Late Miocene – Early Pliosen (N16 – N19). Depositional environtment of the lithology are ranged from deep marine, upper bathyal, and neritic. Geological structure of research area is controlled by fold which indicated north – south stress and sinistral slip fault with NE – SW direction. The measurements of slope stability are using Equilibrium Limits Concept of Bishop Simplified Methods. According to slope stability measurement, the value of slope’s safety factors in research area are: 2,32 (Slope 1) which is belonged to stable slope, and 0,993 (Slope 2) which is belonged to critical slope for landslide. Mitigation concepts are given to the critical slope by controlling geometry of slope, applying retaining wall into the slope, and controlling slope drainages. |
| Kata Kunci | Kata Kunci : geologi, kestabilan lereng, longsoran |
| Nama Pembimbing 1 | Dr. Eng. Imam A. Sadisun, S.T., M.T. |
| Nama Pembimbing 2 | Drs. Suwardi, M.Si |
| Tahun | 2013 |
| Jumlah Halaman | 15 |
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