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Hendarmawan -
Universitas Brawijaya
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Environmental Science

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GROUND PENETRATING RADAR (GPR) SURVEY ON THE LAVA FLOW IN THE SUBANG AREA, WEST JAVA PROVINCE, INDONESIA -, Hendarmawan
Bulletin of Scientific Contribution Vol 8, No 2 (2010): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7386.215 KB) | DOI: 10.24198/bsc.v8i2.8247

Abstract

Most hydrogeologist often meet the difficulties for exploration on tle lava flow when groundwater flow within that channel not emerging or no sputed on the surface. While, in other view, depending on frequency, GPR can resolve objects down to the size of a few meters or even centimeters, and this geophysical reflection method with the highest resolving power (GPR) is also as well established tool for geophysical investigations of the shallow subsurface. Thus, it is not surprising if this approach is used at lava flow terrain, in the Subang area. The tim can directly recognized the secondary permeable zone to recommendate the icline drilling with high accurate. Therefore, in this case, the extra effort and cost involved exceed the maksimum benefits or effisien.
LIMESTONE BEDS DEVELOPMENT OF THE MIDDLE–LATE MIOCENE JATILUHUR FORMATION IN THE BOGOR TROUGH, WEST JAVA -, Abdurrokhim; -, Hendarmawan
Bulletin of Scientific Contribution Vol 13, No 2 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1734.662 KB) | DOI: 10.24198/bsc.v13i2.8395

Abstract

The sedimentary rock succession of the Jatiluhur Formation comprises of mixed siliciclastic and carbonate sedimentary rocks. Two intervals of limestone beds are observed along the Cipamingkis River, on the lower and upper part of succession. Limestone in the lower part is typified by coarse-grained slump-scar-fill deposits that deposited during middle Miocene. It is largely consisting of skeletal fragments that have been delivered from the shallow marine carbonate reef of the Upper Cibulakan Formation during relative sea level fall. The punctuated mixing of siliciclastic and carbonate detritus took place during the middle Miocene in the Bogor Trough. Limestone beds in the upper part are characterized by thick- to very thick bedded limestone intercalated with thin- to very thin laminated siltstone, claystone, and fine-grained sandstone, which are interpreted to have been deposited in the shelf margin environment during late Miocene. The limestone consists of various characteristic of packstone, grainstone, rudstone and boundstone. Carbonate reef of the Klapanunggal Formation is interpreted to be the source of thick-bedded limestone in the upper part. The facies mixing of siliciclastic and carbonate sediments occurred in the middle part of Jatiluhur Formation during the late Miocene.
TEMPORAL VARIATION IN PETROGRAPHIC FEATURES OF THE MIOCENE JATILUHUR FORMATION IN THE BOGOR TROUGH, WEST JAVA -, Abdurrokhim; -, Hendarmawan
Bulletin of Scientific Contribution Vol 12, No 2 (2014): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v12i2.8371

Abstract

This paper reports on petrographic features Jatiluhur Formation in the northern part of Bogor Trough. On basis of mineral composition from petrographic analysis of sandstone samples, the petrographic features of the Jatiluhur Formation can be classified into 4 petrographic facies as follow: (F1) Feldspathic arenite, (F2) Feldspathic greywacke, (F3) Limestone, and (F4) Mixed siliciclastic and carbonate. The sediments of the Jatiluhur Formation indicate that they were derived mainly from a continental source, including the Sundaland in the north, which is considered to have been the most possible source area for the Paleogene sediments. The increase in relative abundance of volcanic fragments was documented in the late Miocene samples and this suggests that the late Miocene deposits of the Jatiluhur Formation seem to have also received some sediment directly or indirectly from the contemporaneous volcanic provenances to the south.
PENGELOLAAN AIRTANAH YANG BERWAWASAN LINGKUNGAN OLEH INDUSTRI AIR MINUM DALAM KEMASAN (AMDK) -, T. Yan W. M. Iskandarsyah; -, Hendarmawan
Bulletin of Scientific Contribution Vol 8, No 1 (2010): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v8i1.8242

Abstract

Sustainability of production of bottled drinking water is highly dependent and influenced by the condition of the recharge zone. Thus, knowledge and understanding of local conditions and the behavior of groundwater recharge to the springs is required. To get a decent source of water produced and minimize the impact can inflict negative, then P.T. Tirta Investama implemented several stages such as literature study, identifying the area, a preliminary survey, detail survey, EIA studies, the production (construction and installation), and recharge area study at least one year. Protection of water resources taken from the aquifer is not used by people around in general (aquifers) as well as against the source of water which is generally utilized by the population (unconfined aquifer) translated in the construction of a well borehole. Meanwhile, study catchment areas become the crucial factor in the management of groundwater, natural feedback input is one of the factors associated with the process of infiltration.From this study obtained distribution of the origin of groundwater (recharge) to the water that comes out (discharge) and the layers that tend vulnerable to groundwater contamination. Studies recharge area for a minimum of one year is a very important study as sustainable groundwater resource management efforts in order water balance in a region.
Co-Authors Abdurrokhim -, Abdurrokhim T. Yan W. M. Iskandarsyah -, T. Yan W. M. Iskandarsyah