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All Journal Journal of Aceh Physics Society Jurnal Ilmiah Mahasiswa Kelautan Perikanan Unsyiah
Teuku Khairuman
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Earth & Planetary Sciences Education Physics

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Design of Inversion Modeling 1-D Gravity Data Using a Method of Singular Value Decomposition (SVD) Based on Matlab Irwansyah .; Teuku Khairuman; Nazli Ismail
Journal of Aceh Physics Society Volume 2 Number 1, March 2013
Publisher : PSI-Aceh

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Abstract

The study about design of Inversion Modeling 1-D Gravity Data using a method of Singular Value Decomposition (SVD) based on Matlab has been done. This study is aimed to design the modeling program of 1-D gravity data using SVD method based on Matlab and than apply the program for subsurface investigation based on contras density of the target body. The SVD method was used to solve the inversion code by applying truncation method of the data into some eigen values in order to resolve a better model. Gravity data used for inversion modeling is data generated from the forward modelling code. Inversion modeling program has been tested for several models such as with variation depth and its contrast density vertical fault. The result mostly show  a small data error is equal to 0,9908 mGal.
ANALISIS KESESUAIAN PARAMETER PERAIRAN TERHADAP KOMODITAS TAMBAK MENGGUNAKAN SISTEM INFORMASI GEOGRAFIS (SIG) DI KABUPATEN PIDIE JAYA Farhan Ramadhani; Syahrul Purnawan; Teuku Khairuman
Jurnal Ilmiah Mahasiswa Kelautan Perikanan Unsyiah Vol 1, No 1 (2016): April 2016
Publisher : Universitas Syiah Kuala

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The study aimed to determine the suitability of fishponds in Pidie Jaya, the research was done using GIS spatial analysis method, where the water parameter samples were collected from 20 sampling points, the samples were taken within the river or flow water beside the fishpond. There were 5 parameters measured included salinity, pH, dissolved oxygen, water visibility, and nitrate contents. The analysis was done using kriging interpolation, reclassification, and overlay analysis using weighted overlay. Analysis based on 4 suitability criteria, very suitable, suitable, less suitable, and not suitable. The results of this analysis are that the fishponds fall into very suitable and suitable criteria. Of the total of ±1842 Ha fishponds, 2.37% covering ±43.76 Ha is classified as very suitable, and 97.63% covering ±1798.23 Ha classified as suitable. Results show that Pidie Jaya is good choice for low cost aquaculture ponds with a little treatment for nitrates. Key words: Pidie Jaya; fishpond; GIS; suitability analysis; weighted overlay.  Penelitian ini bertujuan untuk mengetahui kesesuaian lahan tambak berdasarkan kualitas perairan di pesisir Kabupaten Pidie Jaya. Penelitian ini dilaksanakan dengan menggunakan metode analisis spasial Sistem Informasi Geografis (SIG), sampel parameter perairan dikumpulkan dari 20 titik sampling pada saluran tambak. Parameter perairan yang diukur meliputi 5 parameter kunci yang sangat berpengaruh terhadap komoditas tambak, meliputi salinitas, pH, oksigen terlarut, kecerahan air dan kandungan nitrat. Langkah analisis dilakukan menggunakan ordinary kriging, reclassify, dan weighted overlay. Tingkat kesesuaian lahan dibagi kedalam 4 kelas, yaitu sangat sesuai, sesuai, kurang sesuai, dan tidak sesuai. Didapatkan 2 tingkat kesesuaian yaitu kelas sangat sesuai sebesar 2.37% (±43.76 Ha) dan kelas sesuai sebesar 97.63% (±1798.23 Ha) dari total keseluruhan luas tambak seluas ±1842 ha. Hasil tersebut menunjukkan bahwa tambak di Kabupaten Pidie Jaya sesuai untuk usaha pertambakan dengan sedikit perlakuan terhadap nitrat. Kata kunci: Pidie Jaya; kesesuaian lahan; perairan tambak; SIG; weighted Overlay.
Co-Authors Farhan Ramadhani IRWANSYAH . Nazli Ismail Syahrul Purnawan