Identifikasi Bidang Gelincir Menggunakan Metoda Geolistrik Tahanan Jenis Daerah Rawan Longsor Di Kota Padang Dan Kabupaten Agam Sumatera Barat

Talenta Conference Series: Science and Technology (ST) Pub Date : 2019-06-30 DOI:10.32734/st.v2i2.487

Akmam Akmam, Harman Amir;, Amali Putra

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引用次数: 5

Abstract

Sumatera Barat memiliki topografi bergelombang dan curam. Sumatera Barat disamping memiliki kemiringan topografi lebih dari 30 derajat, juga memiliki curah hujan yang tinggi. Kondisi tersebut menjadikan kawasan ini memiliki potensi resiko longsor yang cukup tinggi. Masalah ini perlu ditanggulangi dengan melakukan penelitian tentang bagaimana karakteristik permukaan bidang gelincir sebagai studi pendahuluan mitigasi longsor di Sumatera Barat. Informasi tentang karakteristik bidang lincir di daerah rawan longsor di Sumatera Barat belum banyak tersedia. Dengan alasan di atas, dilakukan penelitian yang bertujuan untuk mengetahui kedalaman dan kemiringan bidang gelincir di Kota Padang dan Kabupaten Agam Sumatera Barat. Penelitian eksploratif ini menggunakan metode resistivitas dengan peralatan Ares (produksi Cheko). Data resistivitas semu diinterpretasikan menggunakan metode inversi Least-Square yang telah dioptimalkan untuk mendapatkan penampang 2D resistivitas sesungguhnya. Ketebalan dan kemiringan permukaan bidang gelincir daerah target dihitung berdasarkan penampang 2D resistivitas sesungguhnya dengan bantuan data topografi. Penelitian menunjukkan bahwa rata-rata kedalaman dan sudut permukaan bidang gelincir di Kabupaten Agam Sumatera Barat masing-masing adalah 410 dan 16,5 meter. Rata-rata kedalaman dan sudut kemiringan permukaan bidang lincir di Padang masing-masing 380 dan 12,5 meter. Batuan yang berperan sebagai permukaan bidang gelincir adalah Clay. West Sumatra has wavy and steep topography. Beside, West Sumatra has topographic slope more than 30, it also has high rainfall. This condition makes this area has a high potential of landslide risk. This problem needs to get a scientific study of how the surface characteristics of the landslide field as a preliminary study of landslide mitigation in West Sumatera. Information on the characteristics of landslide surfaces in landslide prone areas in West Sumatra has not been widely available. Based on the above reason, research has been done to find out the depth and slope of the landslide surface in Padang and Agam Regency of West Sumatra. This explorative research uses resistivity method using Ares equipment set (Cheko production). The apparent resistivity data is interpreted using the optimized optimized least-squares smoothness-constrain inversion method in order to obtain true resistivity 2D cross-section. The layer thickness and the slope of landslide surface the targeted area was calculated base on true resistivity 2D cross-section that synchronized with topographic data. The results showed that the average both depth and angle of the landslide surfaces in Agam regency of West Sumatra were 41 degree and 16.5 meters respectively. The average both depth and angle of the landslide surfaces in Padang were 38 degree and 12.5 meters respectively. The rock that acts as a landslide surfaces is Clay.

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西苏门答腊有一个起伏的地形和陡坡。西苏门答腊的地形坡度超过30度，降雨量也很大。这使得该地区有相当高的滑坡风险。为了解决这个问题，我们需要对西苏门答腊的滑块表面特征的初步研究来解决这个问题。在西苏门答腊的易山体滑坡地区，关于泥滑块的特性的资料并不多。基于上述原因，研究的目的是了解巴东市和西苏门答腊区滑井的深度和坡度。这种探索性研究采用了战神装备的电阻率研究。电阻率数据是用优化的偏振光反版方法来解释的，以获得真正的电阻率2D截图。目标区域的厚度和斜率是通过地形数据的实际阻力截面2D来计算的。研究表明，西苏门答腊区ge文物的平均深度和表面角度分别为410英尺和16.5米。田间平均深度和倾斜角，每块地380到12.5米。岩石表面的滑动是粘土。西苏门答腊有很酷的民族志。比赛德，西苏门答腊的水管有30多台，而且很high。这一情况使这一地区具有高度的陆地风险。这个问题需要对景观的表面构造进行一项科学研究，作为西苏门答腊的原始景观研究。在西苏门答腊的陆地奇观上的信息并不可靠。基于上述原因，研究已经查明在北苏门答腊的北境中发现的土壤和淤泥。这种探索研究的抗焦虑方法使用了战神equipment set (Cheko production)。数据的潜在阻力是用优化的斜面面平滑性菌株来解释的。瞄准区域的层层土壤和表层的淤泥在一个与地形数据同步的连续2D区域上calculated base on true电阻2D intersection据推算，在西苏门答腊境内，陆地的平均高度是41度和16.5米。战场上的平均高度为38度和12.5米。那块土地表面的岩石是粘土。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Talenta Conference Series: Science and Technology (ST)

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