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"Farms observational land agricultural (BPLP) BATAN lies at palasari's Village , Cipanas's district, Cianjur's regency, West Java.The currently used water resources, come from shallow well that groundwater's quality adverse, brownish rush colored, so indecent being utilized as source of fresh water...."

"Di Universitas Indonesia, khususnya di area barat laut Rektorat Universitas Indone- sia masih sedikit dilakukan penelitian yang mendalam mengenai water table dan zona akuifer. Penelitian ini akan membahas mengenai keberadaan zona water table dan zona akuifer dengan menggunakan metode geolistrik resistivitas kon gurasi dipole-dipole. Penelitian ini dilakukan dengan menggunakan 3 lintasan, dengan panjang lintasan masing-masing 88 meter dengan posisi lintasan sejajar, penelitian ini menghasilkan data penampang 2D dan penampang 3D dari daerah penelitian. Hasil dari penelitian ini menghasilkan visualisasi lapisan bawah permukaan berupa kondisi seperti zona water table dan keberadaan zona akuifer di lokasi penelitian. Berdasarkan model struktur tanah bawah permukaan, didapatkan bahwa zona water table dengan nilai resistivitas 9-78,9 ohm meter terletak pada kedalaman 3,8 meter.

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At the University of Indonesia, especially in the northwest area of the University of Indonesia Rectorate, little in-depth research has been done on the water table and the aquifer zone. This research will discuss the existence of water table and aquifer zones using the Geoelectric method with dipole-dipole con guration. This research will be conducted using 3 tracks, with a track length of 88 meters each with parallel track positions, this research produces 2D cross-sectional data and 3D cross-sections of the research area. The results of this study produce visualization of the subsurface layer in the form of conditions such as the water table zone and the presence of aquifer zones in the research location. Based on the subsurface soil structure model, it is found that the zone of water table zone with a resistivity value of 9 - 78.9 ohm meters is located at a depth of 3.8 meters."

"The text provides the knowledge needed to deal with a quantitative approach, the multiple aspects related to the flow of groundwater resources (groundwater) and propagation and remediation of contaminants in water systems. Describes the basic properties that define the capacity of storage, transport and release water in aquifers, and then, describes the methods for the determination of these parameters with the execution and interpretation of evidence of groundwater, well water and of laboratory. From the physical-chemical and toxicological classification of contaminants are then analyzed the propagation mechanisms and discusses the analytical solutions of the mass transport in porous media. The last part of the text is devoted to the characterization and remediation of contaminated aquifers."

"Di Universitas Indonesia belum pernah di lakukan penelitian spesifik mengenai water table dan zona akuifer, dan penelitian ini akan membahas tentang keberadaan lapisan water table dan akuifer menggunakan metode geolistrik konfigurasi Wenner di Lapangan Rotunda, Universitas Indonesia, Depok, Jawa Barat, Pada penelitian ini dilakukan pengukuran menggunakan 3 lintasan, setiap lintasan memiliki panjang 95 meter dengan posisi lintasan sejajar. Pengolahan data dan inversi 2D menggunakan software Res2Dinv, dan interpretasi 3D menggunakan RockWork. Penelitian ini dikontrol menggunakan data uji lab nilai resistivitas tanah dan data geologi dari GeoMap (ESDM). Hasil dari penelitian ini mencitrakan kondisi lapisan bawah permukaan seperti zona water table dan keberadaan akuifer di lokasi penelitian. Berdasarkan model struktur lapisan tanah di bawah permukaan, diperoleh zona water table dengan nilai resistivitas sebesar 42.6-68.7 ohm meter berada pada kedalaman 12 meter. Ketebalan akuifer belum dapat di identifikasi dengan baik karena penetrasi konfigurasi yang digunakan masih terlalu dangkal.

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At the University of Indonesia, there has never been a specific research on water tables and aquifer zones, and this study will discuss the existence of water table layers and aquifers using the Wenner configuration geoelectric method in the Rotunda Field, University of Indonesia, Depok, West Java, In this study, measurements were carried out using 3 passes, each track has a length of 95 meters with the position of the track parallel. 2D data processing and inversion using Res2Dinv software, and 3D interpretation using RockWork. This study was controlled using lab test data of soil resistivity values and geological data from GeoMap (ESDM). The results of this study image the condition of subsurface layers such as water table zones and the presence of aquifers at the study site. Based on the subsurface soil structure model, a water table zone with a resistivity value of 42.6-68.7 ohm meters was obtained at a depth of 12 meters. The thickness of the aquifer has not been identified properly because the penetration of the configuration used is still too shallow."

"Seiring dengan pertumbuhan kebutuhan air penduduk Kabupaten Sumbawa Barat (KSB) yang meningkat, kebutuhan air untuk industri pun juga terus meningkat tiap tahunnya. Industri di KSB berperan penting bagi perekonomian KSB serta menjadi salahsatu proyek strategis nasional. Pemenuhan kebutuhan air bagi industri pun menjadi sangat dibutuhkan untuk menyokong pengembangan industri di KSB. Maka, perlu dilakukan eksplorasi sumber air tanah, salah satunya ialah pencarian lapisan akuifer. Eksplorasi air tanah ini dilakukan dengan menggunakan metode geolistrik tahanan jenis dengan konfigurasi Wenner-Schlumberger. Lima lintasan dengan 48 buah elektroda disusun dengan jarak spasi antar elektroda sepanjang 20 meter dengan maksud dapat mengidentifikasi lapisan akuifer dalam. Hasil interpretasi menunjukkan keberadaan lapisan akuifer yang diduga memiliki rentang nilai tahanan jenis 10-30 Ωm. Lapisan akuifer tersebut berasosiasi dengan lapisan batuan pasir lempungan dan breksi lapuk serta diklasifikasikan sebagai lapisan akuifer bebas. Lapisan akuifer tersebut juga diduga memiliki lapisan dasar berupa lapisan batuan breksi segar. Lapisan akuifer tersebut tersebar mendominasi wilayah barat area penelitian serta diduga memiliki ketebalan hingga lebih dari 100 meter yang direkomendasikan sebagai wilayah pengeboran untuk melakukan eksplorasi lanjutan dalam identifikasi sumber air tanah si area tersebut.

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Along with the growing water needs of the population of West Sumbawa Regency (KSB), the demand of water for industry also continues to increase every year. Industry in KSB plays an important role in the economy of KSB as well as being one of the national strategic projects. Fulfilling water needs for industry is also very necessary to support industrial development in KSB. So, it is necessary to explore groundwater sources, one of which is the search for aquifer layers. This groundwater exploration was carried out using the resistivity geoelectric method with the Wenner-Schlumberger configuration. Five tracks with 48 electrodes were arranged with a distance between the electrodes of 20 meters to identify the deep aquifer layer. The interpretation results indicate the presence of an aquifer layer which is thought to have resistivity values ranging from 10- 30 Ωm. The aquifer layer is associated with the clayey sand layer and weathered breccia and is classified as an unconfined aquifer layer. The aquifer layer is also thought to have a base layer in the form of fresh breccia rock layers. The aquifer layer is scattered to dominate the western area of the research area and is thought to have a thickness of up to more than 100 meters which is recommended as a drilling area to carry out further exploration in identifying groundwater sources in the area."

"Kabupaten Sumbawa Barat (KSB) telah ditetapkan menjadi salah satu daerah yang kawasaan industrinya akan dikembangkan. Pengembangan tersebut akan didukung oleh penyediaan bahan berupa air baku. Penyediaan air tersebut harus dipenuhi oleh air tanah yang berasal dari akuifer dalam. Lapangan-Y berada di salah satu kawasan industri terbanyak di KSB. Oleh karena itu, perlu dilakukan pencarian akuifer dalam agar pengembangan kawasan industri di daerah ini dapat terwujud. Lapisan dan sebaran akuifer tersebut diidentifikasi menggunakan metode tahanan jenis konfigurasi Wenner-Schlumberger dengan menggunakan 48 elektroda dan jarak spasi 15m. Interpretasi menunjukkan lapisan akuifer memiliki nilai tahanan jenis 10Ωm sampai 20Ωm dengan litologi berupa breksi vulkanik lapuk dengan sisipan batupasir tuf dari satuan batuan gunungapi. Lapisan akuitard memiliki nilai tahanan jenis 4Ωm sampai 10Ωm dengan litologi berupa breksi vulkanik lapuk dengan sisipan tuf pasiran. Lapisan impermeabel yang menjadi batuan dasar memilliki nilai tahanan jenis lebih dari 20Ωm litologi aglomerat. Lapisan akuifer di lapangan-Y tersebar dengan ketebalan 40m sampai lebih dari 100m. Lapisan akuifer paling tebal diindikasikan berada di lintasan 1A04 dengan topografi yang lebih datar dan lapisan aglomerat dasar yang diduga sebagai wadah tempat berkumpulnya air. Rekomendasi titik bor juga direkomendasikan pada jarak 550m di lintasan 4 karena titik tersebut diduga sebagai tempat berkumpulnya air.

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West Sumbawa Regency (KSB) has been designated as one of the areas whose industrial area will be developed. The development will be supported by the provision of water. The water supply must be met by groundwater from deep aquifers. Field-Y is located in one of the most industrial areas in KSB. Therefor, it is necessary to search for deep aquifers so that the development of industrial areas in this area can be realized. The layers and distribution of aquifer were identified using the resistivity method with the Wenner-Schlumberger configuration using 48 electrodes with 15m spacing. The interpretation shows that the aquifer layer has a resistivity value of 10Ωm to 20Ωm with the lithology is weathered volcanic breccia with intercalations of tuffaceous sandstone from volcanic rock units. The Aquitard layer has a resistivity value of 4Ωm to 10Ωm with the lithology is weathered volcanic breccia with sandy tuff intercalations. The impermeable layer that becomes the bedrock has a resistivity value of more than 20Ωm with agglomerate lithology. The aquifer layer in the Y-field is spread with a thickness of 40m to more than 100m. The thickest aquifer layer is indicated to be on track 1A04 with a flatter topography and a bottom agglomerate layer which is thought to be a catchment area. The recommended drill point is also recommended at a distance of 550m on track 4 because that point is suspected to be a catchment area."

"Kebutuhan airtanah memiliki peranan penting, terutama sektor perindustrian di kota-kota besar seperti DKI Jakarta. Wilayah Jakarta bagian utara mengalami alih fungsi lahan menjadi area terbangun dan perindustrian yang menyebabkan konsumsi airtanah meningkat. Sektor perindustrian hanya dapat memanfaatkan airtanah pada akuifer tertekan, sehingga perlu adanya beberapa parameter sebagai bahan pertimbangan dalam memanfaatkan airtanah agar tidak menimbulkan masalah lingkungan. Oleh sebab itu, penelitian ini berfokus di Cekungan Airtanah (CAT) Jakarta bagian utara dengan tujuan dalam menganalisis karakteristik akuifer tertekan dan menghitung debit maksimum pengambilan airtanah pada akuifer tertekan. Metode yang digunakan adalah well logging, cutting, coring, dan pumping test. Karakteristik akuifer tertekan menggunakan semua metode pada penelitian ini. Analisis data cutting dan coring digunakan untuk korelasi litologi bawah permukaan, data well logging digunakan untuk menentukan tipe akuifer agar dapat dibuat model hidrostratigrafi, dan data pumping test digunakan untuk menganalisis karakteristik akuifer. Karakteristik akuifer tertekan dianalisis dari parameter hidrolik akuifer, yaitu transmisivitas dan konduktivitas hidrolik. Tingkat transmisivitas akuifer tertekan tergolong sangat rendah – sangat tinggi dengan rentang nilai dari 0.0015 - 226.024 m2/hari. Nilai konduktivitas hidrolik akuifer tertekan dari lima sumur memiliki rentang nilai dari 0.069 – 3.06 m/hari yang tergolong relatif rendah – sedang. Nilai transmisivitas dan data muka airtanah digunakan untuk menghitung debit maksimum daerah penelitian. Penghitungan debit maksimum pengambilan airtanah akuifer tertekan pada lima sumur didapat melalui penghitungan penurunan maksimum muka airtanah yang diizinkan dan debit optimum. Nilai debit maksimum penghitungan memiliki rentang 0.03 – 10.34 l/det. Penghitungan debit maksimum dan debit optimum dapat dijadikan syarat untuk pengambilan airtanah untuk memanfaatkan airtanah agar tidak terjadi kerusakan lingkungan pada akuifer tertekan tersebut.

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The need for groundwater is essential, especially in the industrial sector in huge cities like DKI Jakarta. The northern part of Jakarta transformed land use into a built-up area and industry, which caused an increment in groundwater consumption. The industrial sector only utilizes groundwater in confined aquifers, so it is necessary to have several parameters for consideration in using groundwater so there is no negative environmental impact. Therefore, this study focuses on the northern Jakarta Groundwater Basin, aims to analyze the characteristics of confined aquifers and calculate the maximum discharge of groundwater withdrawal in confined aquifers. This study used several methods, i.e., well logging, rock cutting, rock core, and pumping test. The characteristics of the confined aquifer used all methods in this study. Analysis of rock cutting and rock coring data were used for correlate the subsurface lithology, well logging data were used for determine the type of aquifers in order to make hydrostratigraphic model, and pumping test data were used for analyze the characteristics of aquifer. The characteristics of confined aquifer were analyzed from hydraulic parameters of the aquifers, i.e., transmissivity and hydraulic conductivity. The rates of transmissivity are very low to very high with a range of value from 0.0015 - 226.024 m2/day. The value of confined aquifer hydraulic conductivity from five wells have range from 0.069 – 3.06 m/day, which is relatively low to intermediate. The value of transmissivity and groundwater level data were used for calculating the maximum discharge of groundwater withdrawal in this study area. The maximum discharge of groundwater withdrawal calculation from confined aquifers took place in five wells and were obtained by calculating the maximum allowable groundwater level decrease and the optimum discharge of groundwater withdrawal. The value of maximum discharge has a range from 0.03 – 10.34 l/s. The calculation of maximum discharge and optimum discharge can be used as a condition for groundwater extraction to prevent environmental damage for the confined aquifer."

"Air tanah dangkal dipengaruhi oleh kondisi lingkungan dimana air tanah dangkal dapat mengalami penurunan dan pengisian kembali saat pergantian musim. pada musim hujan terjadi kenaikan muka air tanah dangkal akibat pengisian kembali dan pada musim kemarau terjadi penurunan muka air tanah. Dalam penelitian ini akan dilakukan studi kasus perbedaan kondisi zona akuifer dan water table saat musim kemarau. penelitian ini menggunakan penelitian terdahulu yang dilakukan saat musim hujan sebagai acuan pembanding. Penelitian ini dilakukan dengan menggunakan tiga titik pengukuran, untuk setiap lintasan memiliki panjang 100 meter dengan posisi tiap lintasan sejajar menggunakan metode geolistrik kon g- urasi Schlumberger. Hasil dari penelitian ini dapat mengetahui perbedaan kondisi zona akuifer dan water table bawah permukaan saat musim kemarau dan musim hu- jan. Berdasarkan analisa yang telah dilakukan diketahui terjadi penurunan muka air sedalam 5.02 hingga 5.64 meter dengan nilai resistivitas 28.68 - 41.42 ohm meter serta terjadi penurunan akumulasi curah hujan sebesar 510 mm.

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Shallow groundwater is in uenced by environmental conditions where shallow groundwater can experience a decrease and replenishment during the change of sea- sons. in the rainy season there is an increase in the shallow groundwater level due to replenishment and in the dry season there is a decrease in the groundwater level. In this research, a case study of the difference in the condition of the aquifer zone and water table during the dry season will be conducted. This research uses previous re- search conducted during the rainy season as a comparison reference. This research was conducted using three measurement points, for each track has a length of 100 meters with the position of each track parallel using the Schlumberger con gura- tion geoelectric method. The results of this study can determine the differences in the condition of the aquifer zone and subsurface water table during the dry season and the rainy season. Based on the analysis that has been done, it is known that there is a decrease in water level as deep as 5.02 to 5.64 meters with a resistivity value of 28.68 - 41.42 ohm meters and a decrease in rainfall accumulation of 510 mm."