scholarly journals Identification Of Unconfined Aquifer Using 3D Resistivity Analysis At Simpang 5 Area, Semarang, Central Java, Indonesia

Warta Geologi ◽  
2020 ◽  
Vol 46 (3) ◽  
pp. 199-203
Author(s):  
Supriyadi Supriyadi ◽  
◽  
Fianti Fianti ◽  
Dwi Rizki R ◽  
Agus Setyawan ◽  
...  
Keyword(s):  
Survey Design ◽  
Living Organism ◽  
Unconfined Aquifer ◽  
The North ◽  
Resistivity Method ◽  
Central Java ◽  
Groundwater Aquifer ◽  
Groundwater Condition ◽  
On Line ◽  
2D And 3D

Water is a unique property of the Earth and very important to every living organism. The existence of groundwater is only 0.61% of the total water on earth (oceans, rivers, lakes, polar ice, rain). The purpose of this research is to determine the location and depth of the aquifer by using 2D and 3D modeling. The method of research is resistivity method using Schlumberger configuration, where data is collected according to the survey design with coordinate ranging from X:436100, Y:9226880 to X:436680, Y:9227640, and covered by 7 lines. The modeling results indicate that the present groundwater aquifer potential has low resistivity distribution in this area. The spreading of unconfined aquifer is estimated on the north side to the east of Simpang 5 area. This can be seen from syncing the data of line one to six. But the data on line seven is of different patterns with other lines. The existence of groundwater basin is not easily identified on this line. This may be due to the location of Line Seven being located in the area of Ciputra Mall, Horison Hotel and Tlogorejo Hospital with higher consumption of water, thus the decrease in groundwater condition. This may cause conditions such as land subsidence. The results of interpretation based on the modeling show the possibility of an unconfined aquifer with groundwater level at 10-15 m depth with varied end of border groundwater depth.

scholarly journals The saline Interface of a Shallow Unconfined Aquifer, Rangitikei Delta

2021 ◽  
Author(s):  
◽  
Desiree S A Craig
Keyword(s):  
Salt Marsh ◽  
River Estuary ◽  
Shallow Groundwater ◽  
Cumulative Effect ◽  
High Volume ◽  
Unconfined Aquifer ◽  
Saline Intrusion ◽  
Groundwater System ◽  
The North ◽  
Groundwater Aquifer

<p>The coastal communities of Tangimoana and Scott's Ferry have a long history of using shallow groundwater bores. The cumulative effect of pumping over decades could influence the saline interface given the close proximity of the communities to the seashore and river estuary. It is important to quantify the effects of pumping on both the shallow groundwater system and the dynamics of the saline interface. This is necessary to protect the groundwater system against saline intrusion especially given the increasing number of high volume groundwater consents to support dairying. Resistivity soundings and traverses, coupled with chemical analyses of groundwater samples, were found to be an effective method for defining the saline interface of the shallow groundwater aquifer under the Rangitikei delta. The saline interface extends from the salt marsh to beneath the farmland north of Tangimoana. The interface is a zone of diffusion with freshwater and brackish water mixing from the estuary. The interface is currently located on the outskirts of Tangimoana, and it is likely to extend beneath the township. The infiltration of brackish surface waters into sediments of the salt marsh form a surficial mixing zone that decreases with distance from the salt marsh. There is no indication of salinity in the area to the north of the Rangitikei delta. This area is most at risk of contamination from saline intrusion because of high volume groundwater abstractions, even though these abstractions are from deeper aquifers. The shallow groundwater beneath Tangimoana showed high concentrations of Ca and HCO3 ions. This may be a result of carbonate dissolution, which can occur when saline and freshwater mix. This creates groundwater that is under-saturated with calcium. The mixing water dissolves carbonates and increases the concentrations of Ca and HCO3. The major source of sodium and chloride was likely rainwater with evaporated solutes from seawater. The saline interface near Tangimoana appears to be relatively static, but the estuary and salt marsh are areas of low relief. There are preferential flows paths across the salt marsh to the farmland. These factors make the shallow groundwater in the Rangitikei delta vulnerable to saline intrusion.</p>

scholarly journals Identifikasi Akuifer Air Tanah Menggunakan Metode Geolistrik Tahanan Jenis Konfigurasi Dipol-Dipol Di Masjid Kampus Universitas Sam Ratulangi

Jurnal MIPA ◽  
2017 ◽  
Vol 6 (1) ◽  
pp. 17
Author(s):  
Ofvelia Thrisha Gijoha ◽  
As’ari As’ari ◽  
Guntur Pasau
Keyword(s):  
Specific Resistivity ◽  
Resistivity Method ◽  
Groundwater Aquifer ◽  
On Line ◽  
Southern Side ◽  
Dipole Configuration

Telah dilakukan penelitian akuifer air tanah berdasarkan resistivitas batuan bawah permukaan. Eksplorasi geofisika menggunakan metode tahanan jenis konfigurasi dipol-dipol dengan pengkuran dengan 5 lintasan pengukuran. Data setiap lintasan diolah menggunakan perangkat lunak RES2DINV, pada setiap lintasan mempunyai 609 buah data. Teridentifikasi akuifer air tanah dengan resistivitas ρ ≤ 7,16 Ωm. Akuifer potensial terdapat pada lintasan 1 di lokasi Masjid bagian Timur dengan kedalaman 0-15 m, pada lintasan 3 pada jarak 40 m disebelah Selatan Masjid dan lintasan 4 pada jarak 5 m selatan Masjid bagian Barat dengan kedalaman 14-18 m.A research on groundwater aquifer has been done according to subsurface rocks resistivity, the exploration using specific resistivity method of dipole-dipole configuration by measuring on 5 lanes. The data on each lane was processed using RES2DINV software, where each lane consisted of 609 data. The identified groundwater aquifer has a resistivity of ρ ≤ 7,16 Ωm. Potential aquifer are on line 1 which located eastward from the Mosque with a depth of 0-15 m, on line 3 with a range of 40 m southward from the Mosque, and on line 4 with a range ofnm westward from the southern side of the Mosque with a depth of 14-18 m.

scholarly journals The saline Interface of a Shallow Unconfined Aquifer, Rangitikei Delta

2021 ◽  
Author(s):  
◽  
Desiree S A Craig
Keyword(s):  
Salt Marsh ◽  
River Estuary ◽  
Shallow Groundwater ◽  
Cumulative Effect ◽  
High Volume ◽  
Unconfined Aquifer ◽  
Saline Intrusion ◽  
Groundwater System ◽  
The North ◽  
Groundwater Aquifer

<p>The coastal communities of Tangimoana and Scott's Ferry have a long history of using shallow groundwater bores. The cumulative effect of pumping over decades could influence the saline interface given the close proximity of the communities to the seashore and river estuary. It is important to quantify the effects of pumping on both the shallow groundwater system and the dynamics of the saline interface. This is necessary to protect the groundwater system against saline intrusion especially given the increasing number of high volume groundwater consents to support dairying. Resistivity soundings and traverses, coupled with chemical analyses of groundwater samples, were found to be an effective method for defining the saline interface of the shallow groundwater aquifer under the Rangitikei delta. The saline interface extends from the salt marsh to beneath the farmland north of Tangimoana. The interface is a zone of diffusion with freshwater and brackish water mixing from the estuary. The interface is currently located on the outskirts of Tangimoana, and it is likely to extend beneath the township. The infiltration of brackish surface waters into sediments of the salt marsh form a surficial mixing zone that decreases with distance from the salt marsh. There is no indication of salinity in the area to the north of the Rangitikei delta. This area is most at risk of contamination from saline intrusion because of high volume groundwater abstractions, even though these abstractions are from deeper aquifers. The shallow groundwater beneath Tangimoana showed high concentrations of Ca and HCO3 ions. This may be a result of carbonate dissolution, which can occur when saline and freshwater mix. This creates groundwater that is under-saturated with calcium. The mixing water dissolves carbonates and increases the concentrations of Ca and HCO3. The major source of sodium and chloride was likely rainwater with evaporated solutes from seawater. The saline interface near Tangimoana appears to be relatively static, but the estuary and salt marsh are areas of low relief. There are preferential flows paths across the salt marsh to the farmland. These factors make the shallow groundwater in the Rangitikei delta vulnerable to saline intrusion.</p>

Aplikasi metode tahanan jenis dalam studi geologi karst Gua Seropan di Gunung Kidul, Yogyakarta

2017 ◽  
Vol 12 (2) ◽  
pp. 105-116
Author(s):  
Pulung A. Pranantya ◽  
Nurlia Sadikin
Keyword(s):  
Fresh Water ◽  
Ground Surface ◽  
Water Source ◽  
Raw Water ◽  
Limited Information ◽  
Resistivity Method ◽  
Central Java ◽  
Underground River ◽  
Initial Exploration

In terms of geology, most areas in south of the Gunungkidul District in Central Java consist of the Wonosari formation limestone. The land is generally very dry and source of raw water is also difficult to reach. Findings on the existence of underground river in caves, however, indicate the potential amount of water within the area, especially in the eastern part of the Gunungkidul District. Although limited information available, some fishermen have discovered that Seropan cave contains fresh water source. This cave is situated at 65 m below the cliff. Initial exploration, which done using a multichannel resistivity method, confirmed the availability of freshwater in the cave and underground river. The isopach of cave depth is found in ranges of 80 200 m below the ground surface. The water of Seropan cave can be utilized by implementing pipeline or by drilling at the suggested point based on the interpretation results, i.e. 110o2223.6388 EL 8o42.874 SL. [DY1][PP2][DY1]Perbaiki grammarIn terms of geology, most areas in south of Gunungkidul District in Central Java consist of the Wonosari formation limestone. The land is generally very dry and source of raw water is also difficult to reach. Findings on the exixtence of underground river in caves, however, indicate potential amount of water within the area especially in eastern part of Gunungkidul District. Although limited information available, some fishermans has discovered that Seropan cave contain fresh water source. This cave is situated at 65 m below the cliff. Initial exploration, which done using multichannel resistivity method, confirmed the availability of freshwater in the cave and underground river. The iso pach of cave depth is found in ranges of 80 200 m below the ground surface. The water of Seropan cave can be utilized by implementing pipeline or by drilling at the suggested point based on the interpretation results i.e. 110o2223.6388 EL 8o42.874 SL.[PP2]Sudah diperbaiki

Kampungs and Conflict in Colonial Semarang

1988 ◽  
Vol 19 (2) ◽  
pp. 266-291 ◽  
Author(s):  
James L. Cobban
Keyword(s):  
Nineteenth Century ◽  
Twentieth Century ◽  
The United States ◽  
City Council ◽  
Economic Life ◽  
North Coast ◽  
The North ◽  
Central Java ◽  
The Government ◽  
The City

By the beginning of the twentieth century, Semarang was a major port city and administrative centre on Java. Attainment of this position was due partly to the expansion of its hinterland during the nineteenth century. This expansion was closely related to developments in the means of transportation and the consequent ability of plantation owners to bring the products of their plantations to the port for shipment to foreign markets. By the end of the century virtually the whole economic life of central Java focused upon Semarang. The city also exercised administrative functions in the Dutch colonial administration and generally had been responsible for Dutch interests in the middle and eastern parts of the island. The importance of Semarang as an administrative centre increased after 1906. In that year the government incorporated the city as an urban municipality (stadsgemeente). In 1914 it had consular representation from the United States, Belgium, Denmark, France, Great Britain, Italy, Norway, Germany, and Thailand. Subsequently, in 1926 it became the capital of the Province of Central Java under the terms of an administrative reform fostered by the colonial government at Batavia. Status as an urban municipality meant that local officials sitting on a city council would govern the domestic affairs of the city. The members of the city council at first were appointed from Batavia, subsequently some of them were elected by residents of the city. By the beginning of the twentieth century Semarang had enhanced its position as a major port on the north coast of the island of Java. It was one of the foremost cities of the Dutch East Indies, along with Batavia and Surabaya, a leading port and a centre of administration and trade. This article outlines the growth of the port of Semarang during the nineteenth century and discusses some of the conflict related to this growth over living conditions in parts of the city during the twentieth century, a conflict which smouldered for several decades among the government, members of the city council, and the non-European residents of the city, one which remained unresolved at the end of the colonial era.

scholarly journals SwissTargetPrediction: updated data and new features for efficient prediction of protein targets of small molecules

2019 ◽  
Vol 47 (W1) ◽  
pp. W357-W364 ◽  
Author(s):  
Antoine Daina ◽  
Olivier Michielin ◽  
Vincent Zoete
Keyword(s):  
Small Molecules ◽  
Predictive Performance ◽  
Web Interface ◽  
Protein Targets ◽  
Human Proteins ◽  
Speed Up ◽  
On Line ◽  
Efficient Prediction ◽  
2D And 3D ◽  
Similarity Thresholds

Abstract SwissTargetPrediction is a web tool, on-line since 2014, that aims to predict the most probable protein targets of small molecules. Predictions are based on the similarity principle, through reverse screening. Here, we describe the 2019 version, which represents a major update in terms of underlying data, backend and web interface. The bioactivity data were updated, the model retrained and similarity thresholds redefined. In the new version, the predictions are performed by searching for similar molecules, in 2D and 3D, within a larger collection of 376 342 compounds known to be experimentally active on an extended set of 3068 macromolecular targets. An efficient backend implementation allows to speed up the process that returns results for a druglike molecule on human proteins in 15–20 s. The refreshed web interface enhances user experience with new features for easy input and improved analysis. Interoperability capacity enables straightforward submission of any input or output molecule to other on-line computer-aided drug design tools, developed by the SIB Swiss Institute of Bioinformatics. High levels of predictive performance were maintained despite more extended biological and chemical spaces to be explored, e.g. achieving at least one correct human target in the top 15 predictions for >70% of external compounds. The new SwissTargetPrediction is available free of charge (www.swisstargetprediction.ch).

Perhitungan Harga Pokok Produksi (Cost) Hasil Produk Inovatif UMKM Desa Kemuning Ngargoyoso Jawa Tengah

2021 ◽  
Vol 2 (2) ◽  
pp. 89-96
Author(s):  
Lailah Fujianti ◽  
Shinta Budi Astuti ◽  
Rizki Ramadhan Putra Yasa
Keyword(s):  
Local Government ◽  
Raw Materials ◽  
Production Costs ◽  
The South ◽  
The West ◽  
The North ◽  
Central Java ◽  
Innovative Products ◽  
The Cost ◽  
Central Java Province

Abstrak   Kemuning adalah desa di kecamatan Ngargoyoso, Kabupaten Karanganyar, Provinsi Jawa Tengah. Secara geografis batas Desa Kemuning  sebelah barat berbatasan dengan Desa Ngargoyoso, sebelah timur berbatasan dengan Desa Segoro Gunung, sebelah Utara  berbatasan Kecamatan Jenawi dan sebelah selatan berbatasan Desa Girimulyo. Desa ini memiliki Misi yang ingin diwujudkan  yaitu Desa Wisata. Pemerintah setempat  memberikan pelatihan untuk membuat produk inovatif guna melengkapi kebutuhan sebagai desa wisata kepada pelaku UMKM dan Penrajin. Produk Inovatif tersebut akan dijual kepada pengunjung wisata sebagai oleh-oleh. Akan tetapi pelaku UMKM dan Penrajin memiliki kelemahan pembukuan usaha terlebih lagi dalam penetuan biaya produksi produk inovatif. Mereka hanya memperhitungkan biaya bahan baku sebagai komponen biaya produksi.   Tim pengabdian FEB Universitas melaksanakan pengabdian  untuk memberikan materi mengenai konsep perhitungan biaya produksi yang dilakukan dengan interaktif.     Kata Kunci: Desa Kemuning, Harga Pokok Poduksi, Smart Village   Abstract:  Kemuning Villages is one of the villages located in Ngargoyoso district, Karanganyar Regency, Central Java Province. Geographically, Kemuning Village is bordered to the west by Ngargoyoso Village, to the east by Segoro Gunung Village, to the north by Jenawi District and to the south by Girimulyo Village. Kemuning village has a mission to be realized, namely the Tourism Village. The local government provides training to make innovative products to complement the needs of a tourism village for MSMEs and craftsmen. These innovative products will be sold to tourist visitors as souvenirs. However, SMEs and craftsmen have weaknesses in business bookkeeping, especially in determining the cost of producing innovative products. They only take into account the cost of raw materials as a component of production costs. The Team from FEB University Pancasila carried out the service to provide material on the concept of calculating production costs which was carried out interactively.     Keywords: Desa Kemuning, Cost of Good Sold, Smart Village

scholarly journals MONITORING OF MANGROVE GROWTH AND COASTAL CHANGES ON THE NORTH COAST OF BREBES, CENTRAL JAVA, USING LANDSAT DATA

2020 ◽  
Vol 16 (2) ◽  
pp. 197
Author(s):  
Tri Muji Susantoro ◽  
Ketut Wikantika ◽  
Lissa Fajri Yayusman ◽  
Alex Tan ◽  
M. Firman Ghozali
Keyword(s):  
Coastal Area ◽  
Vegetation Index ◽  
Series Data ◽  
North Coast ◽  
Landsat Data ◽  
Coastal Change ◽  
The North ◽  
Central Java ◽  
Normalised Difference Vegetation Index ◽  
Coastal Changes

Severe abrasion occurred in the coastal area of Brebes Regency, Central Java between 1985 and 1995. Since 1997, mangroves have been planted around the location as a measure intended to prevent further abrasion. Between 1996 and 2018, monitoring has been carried out to assess coastal change in the area and the growth and development of the mangroves. This study aims to monitor mangrove growth and its impact on coastal area changes on the north coast of Brebes, Central Java Province using Landsat series data, which has previously proven suitable for wetland studies including mangrove growth and change. Monitoring of mangrove growth was analysed using the normalised difference vegetation index (NDVI) and the green normalised difference vegetation index (GNDVI) of the Landsat data, while the coastal change was analysed based on the overlaying of shoreline maps. Visual field observations of WorldView 2 images were conducted to validate the NDVI and GNDVI results. It was identified from these data that the mangroves had developed well during the monitoring period. The NDVI results showed that the total mangrove area increased between 1996 and 2018 about 9.82 km2, while the GNDVI showed an increase of 3.20 km2. Analysis of coastal changes showed that the accretion area about 9.17 km2 from 1996 to 2018, while the abrasion being dominant to the west of the Pemali River delta about 4.81 km2. It is expected that the results of this study could be used by government and local communities in taking further preventative actions and for sustainable development planning for coastal areas.

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