Karakterisasi Data Mikrotremor Berdasarkan Analisis Kurva HVSR, Particle Motion, Dan Time Frequency Analysis Pada Sistem Sungai Kedung Banteng, Pacitan, Jawa Timur

Chemistra, Paul (2018) Karakterisasi Data Mikrotremor Berdasarkan Analisis Kurva HVSR, Particle Motion, Dan Time Frequency Analysis Pada Sistem Sungai Kedung Banteng, Pacitan, Jawa Timur. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian tugas akhir ini bertujuan untuk mengarakterisasi data mikrotremor pada sistem sungai di Kedung Banteng, Pacitan. Data mikrotremor digunakan untuk melihat respon nilai frekuensi dominan (f0) berdasarkan analisis kurva HVSR (Horizontal to Vertical Spectral Ratio), particle motion, maupun Time Frequency Analysis (TFA) baik di daerah yang dilewati sungai maupun daerah yang tidak dilewati sungai. Berdasarkan interpretasi data tersebut, dapat digunakan untuk mengidentifikasi sungai bawah permukaan. Berdasarkan analisis nilai frekuensi dominan (f0), terdapat dua zona karakter yaitu zona I yang bernilai rendah dengan rentang nilai 3,05 – 5,45 Hz dan zona II yang bernilai tinggi dengan rentang nilai 10,4 – 13,25 Hz, berdasarkan analisis particle motion pada wilayah I yang merupakan daerah sekitar sungai menunjukkan karakter pola orientasi arah getaran Barat Laut-Tenggara (NW-SE) yang tegak lurus terhadap arah aliran sungai yang memiliki orientasi arah Timur-Barat (E-W), dan berdasarkan analisis Time Frequency Analysis (TFA) terdapat kontinuitas amplitudo di daerah yang dialiri sungai dengan nilai amplitudo 2.000 -45.000 dB dengan rentang frekuensi 4-5 Hz pada komponen Z (Vertikal). =========== This thesis research aims to characterize microtremor data at Kedung Banteng river system, Pacitan. Microtremor data is used to see the response of dominant frequency values (f0) based on HVSR (Horizontal to Vertical Spectral Ratio) curves analysis, particle motion, and Time Frequency Analysis (TFA) either in areas passed by river or non-river area. Based on the data interpretation, it can be used to identify subsurface streams. Based on dominant frequency values (f0) analysis, there are two character zones of the low value I zone with a range of values from 3.05 to 5.45 Hz and a high value II zone with a range of values ranging from 10.4 to 13.25 Hz, based on particle motion analysis in region I which is the area around the river shows the character of Orientation orientation pattern of West-Southeast Ocean (NW-SE) that is perpendicular to the direction of river flow that has orientation of East-West direction (EW), and based on Time Frequency Analysis (TFA) there is continuity of amplitude in the rivered region with an amplitude value of 2,000 -45,000 dB with a frequency range of 4-5 Hz on component Z (Vertical).

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: HVSR; Particle Motion; Time Frequency Analysis; Particle Motion; Time Frequency Analysis
Subjects: G Geography. Anthropology. Recreation > GB Physical geography
G Geography. Anthropology. Recreation > GE Environmental Sciences
Q Science > QE Geology > QE538.5 Seismic waves. Elastic waves
Divisions: Faculty of Civil Engineering and Planning > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User: Paul Chemistra
Date Deposited: 26 Mar 2018 03:07
Last Modified: 26 Mar 2018 03:07
URI: http://repository.its.ac.id/id/eprint/50693

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