One-dimensional magnetotelluric inversion using levenberg-marquardt and particle swarm optimization algorithm

Darisma, Dian; Marwan, Marwan

doi:10.1088/1755-1315/364/1/012035

Cited by 5 publications

(3 citation statements)

References 9 publications

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“…As for the altitude and position data taken at each electrode using GPS. Data processing in this study uses Res2DInv software based on least squares optimization to determine subsurface conditions [15]. This program gives results in the form of pseudo-sections and resistivity inversion results [16].…”

Section: Methodsmentioning

confidence: 99%

Identification of the Aquifer Layer using the Geoelectric Method in Teupin Batee Village, Aceh Besar

Idris¹,

Darisma

Pramana

et al. 2022

Bulletin of Comp. Sci. Electr. Eng.

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The need for clean water around the world is related to the increasing population, especially in Teupin Batee Village, Aceh Besar District. In addition to surface water, groundwater is one of the potentials that can be utilized by the community, particularly for household needs. The purpose of this study is to identify the aquifer layer using the geoelectric method. One of the geophysical methods that can be used to map groundwater potential is the geoelectrical method based on the resistivity value of subsurface rocks. This study uses the Wenner-Schlumberger array because it can map subsurface structures both vertically and horizontally. From the results of the study, it was found that there are four different layers in this research area including, the top soil layer, hard rock, tuffaceous sand and sand layer as aquifer layer. The top soil layer is mixed with tuff, sand and volcanic breccia to a depth of 8 m with a resistivity value of 5-25 ?m. The Hard rock layer is at a depth of 8 m – 30 m with a resistivity value of 45-220 ?m. The tuffaceous sand layer has a resistivity value ranging from 25-55 ?m. While the sand layer or aquifer is at a depth of 10 m – 60 m with a resistivity value of <10 ?m which is separated by a layer of tuffaceous sand between the two aquifer layers.

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Section: Methodsmentioning

confidence: 99%

Identification of the Aquifer Layer using the Geoelectric Method in Teupin Batee Village, Aceh Besar

Idris¹,

Darisma

Pramana

et al. 2022

Bulletin of Comp. Sci. Electr. Eng.

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“…The resistivity data obtained in the field will be processed using the RES2DINV software to obtain a resistivity crosssection. The program is based on the smoothness constrained least square approach (deGroot Hedlin and Constable, 1990;Sasaki, 1992;Darisma and Marwan, 2019) which generates subsurface models into rectangular blocks which then determines the optimum inversion parameter. Then the apparent resistivity value is calculated from the block model based on the finite difference or finite element method which is compared with the measurement data.…”

Section: Fig 2 Electrode Configuration Of Wennerschlumbergermentioning

confidence: 99%

Investigation of Groundwater Potential using Electrical Resistivity Method and Hydraulic Parameters in Lam Apeng, Aceh Besar, Indonesia.

Darisma

Fernanda

Syukri

2020

J. Geoscience Eng. Environ. Technol.

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Lam Apeng is a village with a majority of people living as farmers, which causes the need of water for agriculture is increasing. The water demand in this area continues to increase as the population increases, for various purposes. The objective of this study is to determine the distribution of the groundwater layer using the electrical resistivity method and to determine groundwater potential using hydraulic parameters. This research is conducted using 2 measurement line with a length of each line is 112 meters and distances of each electrode is 2 meters. The data invert using Res2Dinv software to obtain 2D subsurface lithology subsurface. At line 1, the aquifer (sand) layer is located in the second layer with a rock resistivity value of 12 Ωm - 18.6 Ωm at a depth of 8 m - 18 m. At line 2, the aquifer (sand) layer is also located in the second layer with a resistivity value of 4.6 Ωm - 18 Ωm at a depth of 5 m – 12 m. Based on the interpretation of the two measurement lines, it can be concluded that the type of aquifer in the research site is a semi unconfined aquifer. In this study, hydraulic parameters (hydraulic conductivity, longitudinal conductance, transverse resistance, and transmissivity) was calculated based on the resistivity value and the thickness of the aquifer layer. The average resistivity of the aquifer layer used is 15.3 Ωm and 11.3 Ωm, respectively for line 1 and line 2, indicating that the aquifer was moderately corrosive. Longitudinal conductance values are 0.65 Ω-1 and 0.62 Ω-1 which indicated moderate protective capacity. The transmissivity values are 6.78 m2/dayand 4.77 m2/day, which indicates that the designation in this area is low and the groundwater potential is local or only for personal consumption.

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“…The modeling and inversion for 1D structure are relatively simple and routinely used by numerous MT practitioners. [5][6][7][8][9][10][11][12] 1D inversion of MT data is also used to construct an initial guess model for 2D and 3D inversion. [13][14][15] Linearized least square inversion and minimum norm inversion are the basic approaches for 1D inversion.…”

Section: Introductionmentioning

confidence: 99%

One‐Dimensionl Inversion of Magnetotelluric Field Data by SIS and Occam's Inversion Technique: A Case Study from the Indian Himalaya

Tyagi

Sharma

Sehrawat

et al. 2023

Macromolecular Symposia

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Electromagnetic method is one of the most effective geophysical methods in earth crust and mantle structure studies. Magnetotelluric (MT) data are used to obtain resistivity image of earth's surface on the depth scale of few hundred of meters to several tens of km. One-dimensional (1D) MT inversion is carried out to estimate electrical resistivity variation of earth's surface with depth. In the present research paper one-dimensional inversion of MT sounding curves is carried out on nine sites in foothill of Himalaya near Roorkee to Hardwar region. A non-iterative and minimum norm estimator based algorithm Straight forward Inversion Scheme (SIS) is used to obtain continuous smoothest resistivity depth model. Another iterative and minimum norm estimator based algorithm Occam's inversion scheme is also used to obtain smoothest one-dimensional inversion model. The data is inverted for both TE-and TM-mode of polarization. The inverted data shows one-dimensional behavior of subsurface resistivity up to depth about 0-15 km with resistivity variation ≈10-100 ohm-m in both modes of polarization and after that the subsurface structure is two-dimensional in both modes. 1D inversion of data provides a good starting model to reduce the computational cost of two-dimensional inversion.

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One-dimensional magnetotelluric inversion using levenberg-marquardt and particle swarm optimization algorithm

Cited by 5 publications

References 9 publications

Identification of the Aquifer Layer using the Geoelectric Method in Teupin Batee Village, Aceh Besar

Identification of the Aquifer Layer using the Geoelectric Method in Teupin Batee Village, Aceh Besar

Investigation of Groundwater Potential using Electrical Resistivity Method and Hydraulic Parameters in Lam Apeng, Aceh Besar, Indonesia.

One‐Dimensionl Inversion of Magnetotelluric Field Data by SIS and Occam's Inversion Technique: A Case Study from the Indian Himalaya

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