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JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards)
Published by Kementerian Energi dan Sumber Daya Mineral
ISSN : 20867794     EISSN : 25028804     DOI : -
Core Subject : Science, Social,
Earth & Planetary Sciences Environmental Science
Jurnal Lingkungan dan Bencana Geologi (JLBG) merupakan terbitan berkala Pusat Air Tanah dan Geologi Tata Lingkungan, yang terbit triwulan (tiga nomor) dalam setahun sejak tahun 2010. Bulan terbit setiap tahunnya adalah bulan April, Agustus dan Desember. JLBG telah terakreditasi LIPI dengan nomor akreditasi 692/AU/P2MI-LIPI/07/2015.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol 15, No 1 (2024)" : 5 Documents clear
Geodiversity Inventory and Scientific Value Evaluation of Southern Binongko Island in Wakatobi Regency Masri, Masri; Asruddin, La Ode; Ngkoimani, La Ode
Jurnal Lingkungan dan Bencana Geologi Vol 15, No 1 (2024)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34126/jlbg.v15i1.466

Abstract

Binongko Island is one of the largest islands in Wakatobi Regency, Southeast Sulawesi, with unspoiled and exotic natural tourism. Several tourism objects are karstification products from the Ambeua Formation (Tmpa) and Quaternary (Qpl) limestone. To determine the potential of geodiversity on the island, an inventory and scientific value assessment were conducted. This paper presents the results of the inventory and evaluation of geological diversity as a potential geological heritage on Southern Binongko Island. The methods involve field geological mapping and laboratory analysis.. Field geological mapping include geological trajectory planning, lithology data collection, cave geometry descriptions, and preparation of geological diversity inventory matrices. Laboratory analysis includes observing the thin section using microscope polarization. The geomorphological units of the study area can be divided into karst hills and karst plains. Petrographic analysis of nine thin sections showed crystalline limestone units, grainstone, packstone, wackestone, and mudstone—geological structures in limestone terraces with different lithological variations. The geological diversity of the study area is divided into groups of endokarst cave, karst hills, beaches, and limestone terraces which are divided into 11 (eleven) geological sites, i.e., Topa Raja Cave, Topa Lemali Cave, Topa Lembuko Cave, Wa Ode Goa Cave, Yoro Beach, Koncu Patua Wali Hill, Mbara-mbara Beach, La Sikori Cave, Rock Park, La Handu Hill, and Wa Cimbaumba Beach. Geological sites in the study area have medium to high values.The comparison is based on the criteria of geological heritage (geoheritage); the research area is ranked nationally,with a low, medium, and high scientific value. The highest scientific value is in the Taman Batu geosite and KoncuPatua Wali Hills. Three geotracks are recommended: cave geotrack, rock garden hill geotrack, and beach geotrack.
Analysis of Baturagung Reservoir Leaking, Gedangrejo, Gunung Kidul Regency using Digital Outcrop Model Method Farisan, Ardhan; Bahagiarti, Sari; Nurwantari, Nanda Ajeng; Setyaningrum, Tuti; Rahatmawati, Istiana; Zakaria, Muhammad Faizal; Probowati, Dyah
Jurnal Lingkungan dan Bencana Geologi Vol 15, No 1 (2024)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34126/jlbg.v15i1.482

Abstract

Water, serving as a vital resource, finds applications in diverse sectors such as agriculture (irrigation), drinking watersupply, flood control, and hydroelectric power generation. On a smaller scale, the construction of "Embung" or smallartificial reservoirs facilitates water storage during the rainy season for subsequent use in the dry season. Within thestudy area, a reservoir constructed in 2018 has never attained full capacity, a circumstance that piqued the author'sinterest. A combined approach utilizing aerial photogrammetry and ground observation is employed for comprehensiveanalysis. Aerial photogrammetry yields an extensive and accurately depicted geometric representation of geologicalstructures. The investigation focuses on the Semilir Formation, a volcanic formation. Findings reveal that the studyarea manifests a division into nine (9) segments discerned from distinct structural trends. These segments are delineatedby eight (8) faults, with the major fault identified as Fault F6. Fault F6 exhibits a prevailing NNE-SSW trend,consistent with the primary fault on the regional geological map. Notably, Fault F6 encompasses a substantial faultzone traversing the Baturagung Reservoir and stands accountable for the reservoir's leakage.  
Structural Analysis of Subsurface Based on Shear Wave Velocity Ground Profile Using Ellipticity curve Method in Kendari City Area Arisona, Arisona
Jurnal Lingkungan dan Bencana Geologi Vol 15, No 1 (2024)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34126/jlbg.v15i1.452

Abstract

The Research has been done on the analysis of subsurface structures based on ground profiles of shear wave velocity with the ellipticity curve method in the Kendari City area. This research aims to determine the value of shear wave velocity and subsurface structures based on ground profiles of shear wave velocity with the ellipticity curve method and the relationship between the potential levels of damage that occur in the Kendari City area. The microtremor measurement data used consisted of 30 points with a distance of ±1 km between points. The microtremor data were analyzed using Geopsy software with the HVSR method to get the amplification factor value and dominant frequency value at each measurement point. The data from the HVSR method is inverted using the Dinver subsoftware with the ellipticity curve method so that the modeling of ground profiles is obtained which states the value of the shear wave velocity (vs) which is used to determine the subsurface conditions. The results showed that the magnitude of the shear wave velocity (vs) in the Kendari City area varied between 150 m/s - 1300 m/s at a depth of 100 m. The subsurface structure based on ground profiles of shear wave velocity using the ellipticity curve method in the study area consisted of soft soil types at a depth ranging from 1-10 m, moderate soil types found at a depth of 1-20 m, hard soil types (soft rock) found at a depth of 20 – 90 m and rock types are found at depths above 90 m at almost every measurement point. It is suspected that the subsurface conditions in the study area have the potential for shocks and a high level of damage to buildings in the event of an earthquake because they are dominated by thick soft soil material. 
The Multichannel Analysis of Surface Waves Method (MASW): Brief Theory and Application to Near Fault Zone Identification Handoyo, Handoyo
Jurnal Lingkungan dan Bencana Geologi Vol 15, No 1 (2024)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34126/jlbg.v15i1.493

Abstract

The characterisation of near subsurface geological features such as sedimentary layer thickness distribution andnear-surface geological structures are interest and continues to be studied to understand the complete conditions in thesubsurface. One geophysical method that can be used for characterising shallow targets is the Multichannel Analysisof Surface Waves (MASW) method. The MASW method is a method that utilises the dispersive nature of surface wavesto model the shear wave velocity distribution in each layer vertically (Vs-depth model). The MASW method consists ofthree stages: acquisition, processing, and inversion. In this paper, we describe the general concept/theory of MASWand its application to characterise a shallow fault zone at a target depth of about 150 m in the active zone, IberianPeninsula, Spain. This study is supported by trenches data as a marker for the fault plane in the study area. Basedon the study and results obtained in this paper, it is hoped that it can provide a brief theory regarding the MASWmethod for the benefit of learning and advancing science and technology in Indonesia. Moreover, it is also hopedthat the application of the MASW method in Indonesia will continue to develop and can be used with wider interests.
Groundwater Potential in the Serang - Tangerang Groundwater Basin Based on the Groundwater Balance Method Tirtomihardjo, Haryadi; Setiawan, Taat; Putra, Dendi Borneo; Aminuddin, Aminuddin
Jurnal Lingkungan dan Bencana Geologi Vol 15, No 1 (2024)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34126/jlbg.v15i1.500

Abstract

Groundwater u in an area, region or groundwater basin (GB) needs to consider various aspects, especially technicalaspects related to the existence and potential availability of groundwater in that unit area. The existence of groundwaterdescribes where groundwater is stored and distributed in an aquifer system, including the dimensions of theaquifer system and its hydraulic properties; meanwhile, groundwater availability includes the quantity and qualityof groundwater in the aquifer system. For the use of groundwater to be carried out sustainably, the balance betweengroundwater availability and groundwater use needs to be maintained within a safe limit, meaning that the use ofgroundwater does not hurt either the condition or the environment of groundwater. The balance between the twowhich is known through the calculation of the groundwater balance provides an overall picture of the components ofgroundwater that enters and the component of groundwater that exits an aquifer system. The calculation results forthe Serang-Tangerang GB groundwater balance show that the discharge of free groundwater utilized in the 2020-2021 period is around 60% of the recharge discharge, so it is in the category between safe and critical. Meanwhile,the use of groundwater in confined aquifer systems during these two periods was greater than the flow rate so it wasincluded in the damaged category

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