Analisis Daerah Rawan Bencana Tanah Longsor Berdasarkan Zona Water Content Di Desa Olak Alen Kecamatan Selorejo, Blitar

Aisyah, Maulidah (2017) Analisis Daerah Rawan Bencana Tanah Longsor Berdasarkan Zona Water Content Di Desa Olak Alen Kecamatan Selorejo, Blitar. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Salah satu penyebab terjadinya tanah longsor yaitu adanya zona water content atau zona tersaturasi air dimana terdapat kondisi terakumulasinya air pada suatu lapisan tanah yang sukar meloloskan air. Kondisi tersebut dapat diketahui dengan metode geolistrik resistivitas dengan konfigurasi Wenner-Schlumberger karena dapat menerjemahkan kondisi bawah permukaan secara horizontal maupun lateral dengan baik berdasarkan nilai resistivitas. Nilai zona water content yang terlihat yaitu antara 4,39 – 9,29 Ωm. Berdasarkan peta rawan bencana yang telah dibuat, faktor penyebab terjadinya tanah longsor adalah curah hujan, tutupan lahan, dan kelerengan. Hasil pemetaan yang telah dilakukan menunjukkan bahwa Kecamatan Selorejo merupakan salah satu daerah yang kerawanan longsornya bernilai sedang, yakni diantara 24,03. ================================================================================= One of the causes of landslides is water saturated zone where there is a condition of accumulation of water that trapped in impermeable soil. This can be known by using the resistivity method with the Wenner-Schlumberger configuration that can figure the subsurface condition both horizontally and laterally well base on resistivity parameter. The saturated water zone values are seen between 4.39 - 9.29 Ωm. Another causes from landslide is also seen in the maps that writer have been made such as rainfall, land cover, and slopes. The map that has been done shows that Selorejo District is one of the areas that have moderate vulnerability, is around 24.03

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Tanah longsor, zona water content, geolistrik
Subjects: G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science
Q Science > QE Geology
T Technology > TA Engineering (General). Civil engineering (General) > TA1637 Image processing--Digital techniques
Divisions: Faculty of Civil Engineering and Planning > Geophysics Engineering > (S1) Undergraduate Theses
Depositing User: Maulidah Aisyah
Date Deposited: 28 Sep 2017 02:38
Last Modified: 06 Mar 2019 07:12
URI: http://repository.its.ac.id/id/eprint/44939

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