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Journal articles on the topic 'Bauru aquifer'
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1
Stradioto, Marcia Regina, and Hung Kiang Chang. "Diagênese de Arenitos do Grupo Bauru no Estado de São Paulo." Ciência e Natura 42 (December 30, 2020): e88. http://dx.doi.org/10.5902/2179460x42694.
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In the state of São Paulo, the Bauru Group units cover about 47% of the territory, constituting an aquifer of great interest, in particular for public watersupply. In this study, core samples were taken for petrographic and diagenetic characterization of different units, seeking to improve the knowledge of the Bauru Aquifer System. The samples were submitted to analysis by optical microscopy and scanning electron microscopy. The units of this aquifer system are mostly subarkoses (67% of the samples), except the Marilia Formation, which is composed of sublitharenite and quartzarenite. These sandstones were submitted to shallow and low-intensity diagenesis. The main diagenetic phases identified were dissolution of the detrital minerals, notably feldspar and pyroxene, neoformation of clay minerals, iron oxi-hydroxide, calcite and analcime. Locally there is precipitation of quartz, feldspar and titanium oxide.
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Maldaner, Carlos, Veridiana Martins, Reginaldo Bertolo, and Ricardo Hirata. "Strontium Isotopic Signature of Groundwater from Adamantina Aquifer, Bauru Basin, Brazil." Procedia Earth and Planetary Science 7 (2013): 958–61. http://dx.doi.org/10.1016/j.proeps.2013.03.229.
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Stradioto, Marcia Regina, Elias Hideo Teramoto, Maria Rita Caetano-Chang, and Hung Kiang Chang. "Water-Rock Interactions in the Bauru Aquifer System – São Paulo State, Brazil." Procedia Earth and Planetary Science 17 (2017): 388–91. http://dx.doi.org/10.1016/j.proeps.2016.12.098.
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de Faria, Gabriel Messias Moura, and Giulliana Mondelli. "Interaction between municipal solid waste leachate and Bauru aquifer system: a study case in Brazil." Environmental Science and Pollution Research 24, no. 35 (October 5, 2017): 27553–72. http://dx.doi.org/10.1007/s11356-017-0115-y.
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Santos, T. O., and D. M. Bonotto. "222Rn, 226Ra and hydrochemistry in the Bauru Aquifer System, São José do Rio Preto (SP), Brazil." Applied Radiation and Isotopes 86 (April 2014): 109–17. http://dx.doi.org/10.1016/j.apradiso.2013.12.003.
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Bertolo, Reginaldo, Christine Bourotte, Ricardo Hirata, Leonardo Marcolan, and Ondra Sracek. "Geochemistry of natural chromium occurrence in a sandstone aquifer in Bauru Basin, São Paulo State, Brazil." Applied Geochemistry 26, no. 8 (August 2011): 1353–63. http://dx.doi.org/10.1016/j.apgeochem.2011.05.009.
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Maroubo, Lais A., Marcos R. Moreira-Silva, José Jerônimo Teixeira, and Marcos F. S. Teixeira. "Influence of Rainfall Seasonality in Groundwater Chemistry at Western Region of São Paulo State—Brazil." Water 13, no. 11 (May 21, 2021): 1450. http://dx.doi.org/10.3390/w13111450.
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The present study evaluated the spatiotemporal variation in concentration of cadmium, lead and copper ions in groundwater wells in the stratigraphic subdivision “Santo Anastácio” that belongs to the Bauru aquifer system in the western region of São Paulo State. Exploratory statistics methods were employed to investigate the response of the concentration of these metals in the aquifer through the pluviometric index of the region. The results show a direct dependence of the mean monthly flow of the metals in the groundwaters to the monthly rainfall flow. The observed behavior was cyclic with a gradual increase and decrease in the flow throughout time. Two groups of cyclic variation were identified. The seasonality of the mean monthly flow of Cd2+ and Pb2+ was inversely proportional to the magnitude of the pluviometric index of the region studied. Meanwhile, the seasonality of Cu2+ was directly correlated to the seasonable rainfall variability. These behaviors lead us to point out that cadmium and lead come from minerals present in the aquifer itself and the presence of copper in groundwater is associated with an anthropogenic action due to the region’s agricultural activity. The study helps us better comprehend the behavior of the whole groundwater system through a comparison with temporal hydrogeochemistry.
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Bertolo, Reginaldo, Christine Bourotte, Leonardo Marcolan, Sonia Oliveira, and Ricardo Hirata. "Anomalous content of chromium in a Cretaceous sandstone aquifer of the Bauru Basin, state of São Paulo, Brazil." Journal of South American Earth Sciences 31, no. 1 (February 2011): 69–80. http://dx.doi.org/10.1016/j.jsames.2010.10.002.
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Russi, Daniel, Giancarlo Lastoria, Guilherme Henrique Cavazzana, Sandra Garcia Gabas, and Andressa Oliva. "WATER TABLE FLUCTUATION METHOD TO ESTIMATE THE RECHARGE OF THE FREE AQUIFER IN THE GUARIROBA RIVER BASIN, CAMPO GRANDE – MS." Ciência e Natura 42 (March 4, 2021): e57. http://dx.doi.org/10.5902/2179460x41465.
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The Guariroba river basin was decreed as an Environmental Protection Area (EPA), and with a surface of 360 km² it is of great importance to the municipality of Campo Grande because it supports almost half of the water supply system of the latter. The surface of the basin is predominantly covered by Cretaceous sediments of the Caiuá Group, which constitutes the free aquifer known as the Bauru Aquifer System (BAS). Recent studies have confirmed the contribution of the BAS in the maintenance of the base flow of surface drainage. Therefore, the quantification of groundwater recharge (GWR) becomes fundamental. This work used the water table fluctuation (WTF) method, based on variations in the piezometric surface-water measurement, to estimate the GWR of the basin. From Mar 2015–Feb 2017, monthly variations of the static level were registered in 13 tubular wells located in the Guariroba EPA. Considering a 1480 mm annual precipitation, the estimated average GWR was 356 mm⋅year–1, varying between 210–694 mm⋅year–1. Despite considering a lower value of the effective porosity parameter (Sy = 0.1) than the one suggested for the BAS, the estimated average GWR-to-precipitation ratio (24%) was more than double that the one adopted by the state environmental agency (10%).
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Takafuji, Eduardo Henrique de Moraes, Marcelo Monteiro da Rocha, and Rodrigo Lilla Manzione. "Groundwater Level Prediction/Forecasting and Assessment of Uncertainty Using SGS and ARIMA Models: A Case Study in the Bauru Aquifer System (Brazil)." Natural Resources Research 28, no. 2 (August 17, 2018): 487–503. http://dx.doi.org/10.1007/s11053-018-9403-6.
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Manzione, Rodrigo Lilla, Aira Nava, and Maria Marcia Pereira Sartori. "Modelo híbrido de oscilação de níveis freáticos a partir de diferentes variáveis ambientais." Revista Brasileira de Geografia Física 13, no. 3 (June 1, 2020): 1231. http://dx.doi.org/10.26848/rbgf.v13.3.p1231-1247.
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Os sistemas de águas subterrâneas são complexos e heterogêneos. Seus níveis são afetados por uma combinação fatores naturais e antropogênicos. Esses fatores somados as características naturais inerentes (como permeabilidade, porosidade e granulometria) representam desafios para a modelagem hidrológica. O presente trabalho teve como objetivo verificar a influência de variáveis físico-hídricas e de manejo do solo, topografia e vegetação nas oscilações dos níveis das águas subterrâneas do Sistema Aquífero Bauru (SAB). Dados relacionados a esses aspectos totalizaram 21 possíveis variáveis preditivas dos níveis freáticos. As informações foram coletadas nas bacias hidrográficas da Estação Ecológica de Santa Barbara/SP. A seleção das variáveis de maior relevância para o ajuste do modelo de regressão linear foi realizada por meio da análise de componentes principais, que determinou aquelas com maior variabilidade. Os resultados mostraram um ajuste robusto aos dados pelo modelo multivariado e uma boa capacidade preditiva para novas observações. Essas informações podem auxiliar a tomada de decisão quanto ao uso da água e dar suporte aos instrumentos de gestão de recursos hídricos como ferramentas para o planejamento dos recursos hídricos. Phreatic levels hybrid model from different environmental variables A B S T R A C TGroundwater systems are complex and heterogeneous. The levels are affected by a combination of natural and anthropogenic factors. These factors, added to the inherent natural characteristics (such as permeability, porosity and grain size) represent challenges for hydrological modeling. This study aimed to verify the influence of soil physical-hydric and management, topography and vegetation variables on the Bauru Aquifer System (SAB) groundwater levels oscillations. These aspects summed up to 21 possible predictive variables of groundwater levels. Information were collected at the watersheds of the Santa Barbara Ecological Station/SP-Brazil. The most relevant variables for the multiple regression model were chosen using principal components analysis, which determined those variables with greater variability. The results indicated a robust fit to the data by the model and good predictive capacity for new observations. This information can help decision-making on water use and support water resource management instruments, as tools for water resource planning.Keywords: groundwater; modelling; multiple linear regression; principal component analysis
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Listianto, Miftakhudin, and Riad Syech. "ANALISA POTENSI AKUIFER DI KECAMATAN RUMBAI PESISIR KOTA PEKANBARU DENGAN MENGGUNAKAN METODE GEOLISTRIK ATURAN SCHLUMBERGER." Komunikasi Fisika Indonesia 17, no. 1 (March 31, 2020): 46. http://dx.doi.org/10.31258/jkfi.17.1.46-49.
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The analysis of aquifer potential has been done in the Rumbai Pesisir District of Pekanbaru City by using the Schlumberger configuration geoelectric method. Data was taken from four villages in Rumbai Pesisir Subdistrict, in Lembah Damai, Limbungan, Limbungan Baru and Meranti Pandak. The result obtained using progress software showed that each location has aquifer with different layer and thickness. The highest aquifer resistivity is located in Lembah Damai Village with a resistivity value of 549.50 Ωm in the third layer, while aquifer with the lowest resistivity value is located in Meranti Pandak Village with a resistivity value of 15.69 Ωm in the third layer. The highest thickness aquifer located in Meranti Pandak Village with a thickness of 48.47 m in the third layer, while the lowest thickness aquifer located in Limbungan Baru Village with a thickness of 11.51 m in the second layer. The Result from lithology of each path shows that flow pattern of water flowing from Lembah Damai Village to Limbungan Village, then Meranti Pandak Village and then Limbungan Baru Village. The results of the analysis of aquifers potential indicate that underground water reserves in the Rumbai Pesisir District of Pekanbaru City are 17.13 x 109 m³.
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Sartika, Dewi, Akmal Muhni, Rifqan Rifqan, and Hidayat Syah Putra. "Groundwater Vulnerability to Pollution Using the GOD Method in Banda Aceh City, Aceh Province." Journal of Aceh Physics Society 9, no. 3 (September 1, 2020): 84–90. http://dx.doi.org/10.24815/jacps.v9i3.17332.
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Kerentanan airtanah terhadap pencemaran dapat terjadi akibat adanya aktivitas manusia. Oleh karena itu, kualitas dan kuantitas airtanah perlu diperhatikan. Penerapan metode GOD (Groundwater Occurrence, Overlaying Lithology and Depth Of Groundwater) dilakukan untuk mengkaji kerentanan airtanah di Kota Banda Aceh, Provinsi Aceh. Metode GOD merupakan metode yang dilakukan dengan mengevaluasi tiga parameter yaitu jenis akuifer, jenis litologi diatas akuifer dan kedalaman muka airtanah. Penelitian ini bertujuan memetakan daerah yang berpotensi terjadi pencemaran berdasarkan tingkat kerentanan air tanah dengan menggunakan metode GOD, di Kota Banda Aceh. Hasil dari penelitian menunjukkan tingkat kerentanan airtanah intrinsik berdasarkan metode GOD berkisar pada nilai sedang sampai tinggi. Zona sedang berdasarkan metode ini ditunjukkan pada nilai indeks 0.45-0.5 yang mencakup beberapa daerah seperti Kuta Alam, Kutaraja, Meuraksa, Jaya Baru, Banda Raya, Lueng Bata, dan Baiturrahman. Dan daerah dengan indeks tinggi mencakup kecamatan Syiah Kuala dan Ulee Kareng dengan nilai 0.52-0.69. Kondisi litologi pada daerah penelitian menunjukkan tipe akuifer yang sejenis yaitu sistem akuifer aluvial. The vulnerability of contaminated groundwater caused by human activity. Thus, the quantity and quality of groundwater need more attention. The application of GOD (Groundwater Occurrence, Overlaying Lithology and Depth of Groundwater) methods is done for a review of groundwater vulnerability in Banda Aceh City, Aceh Province. The GOD method is a method by investigating three parameters, they are: type of aquifer, type of lithology above the aquifer, and depth of groundwater table. This study aims to map areas with potential contamination based on the level of groundwater vulnerability using the GOD method, in Banda Aceh City, Aceh Province. The result of the research shows that the level of intrinsic groundwater vulnerability in Banda Aceh by the GOD method range from moderate to high. Moderate groundwater vulnerability zone based on this method has an index value of 0.45 - 0.5 covers several areas, they are: Kuta Alam, Kutaraja, Meuraksa, Jaya Baru, Banda Raya, Lueng Bata, and Baiturrahman. And the high index value covers Syiah Kuala and Ulee Kareng with 0.52 - 0.69. The lithology of the studied area shows the same type of aquifer as an alluvial aquifer system. Keywords: groundwater vulnerability, GOD method, aquifer
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Putra, Dewandra Bagus Eka, Yuniarti Yuskar, Husnul Kausarian, Wan Zuhairi Wan Yaacob, and Mohamad Sapari Dwi Hadian. "Saltwater Intrusion Zone Mapping on Shallow Groundwater Aquifer in Selat Baru, Bengkalis Island, Indonesia." Journal of Geoscience, Engineering, Environment, and Technology 4, no. 1 (March 1, 2019): 16. http://dx.doi.org/10.25299/jgeet.2019.4.1.2672.
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Saltwater intrusion becomes a common problem in coastal area. Northern coast of Bengkalis Island in Riau, Indonesia that contiguously to Malacca Strait is experiencing the problem particularly in Selat Baru area which considered as developing area and most of the people live close to the sea. Dug well is the main source of groundwater that had been used by the population in Selat Baru and as the increasing of land occupation, the demand of clean water is rising up followed by the number of dug well. A study of groundwater monitoring was conducted to identify the zone of saltwater intrusion. Field observation had done by measuring the water level and physical parameters of groundwater such as taste, pH, electrical conductivity (EC) and total dissolved solid (TDS) from 110 existing dug wells. Some conus feature had found from groundwater elevation map which indicated lower water level caused by excessive groundwater pumping. Generally, pH shows values from 6-8 that was still in range of water quality standard, but there are 20 wells (18%) that have pH below the water quality standard (slightly acidic water). Similar pattern had been observed from Electrical Conductivity (EC) and Total Dissolved Solid (TDS) map, higher value of EC and TDS was dominant in the northern part of study area and lower value in the south. Groundwater taste map also revealed the identical condition with EC and TDS map which dominated by brackish and saline water in the northern part. Therefore, the study area had been divided into two zones of groundwater saline water zone possibly caused by the saltwater intrusion in the northern part and freshwater zone from the center to the southern part.
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Nava, Aira, and Rodrigo Lilla Manzione. "Resposta de niveis freáticos do sistema Aquifero Bauru (formação ada-mantina) em função da precipitação e evapotranspiração sob diferentes usos da terra." Águas Subterrâneas 29, no. 2 (August 10, 2015): 191. http://dx.doi.org/10.14295/ras.v29i2.28402.
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<p>O monitoramento das águas subterrâneas é uma ferramenta essencial para o planejamento dos recursos hídricos, tendo em vista que a resposta dos níveis freáticos aos eventos de precipitação varia não só pelas condições hidrogeológicas locais mas também em função do uso, manejo e ocupação da terra. Desta forma, o presente trabalho teve como objetivo a aplicação de modelo baseado em séries temporais a partir de dados de monitoramento de águas subterrâneas para compreensão dos processos que ocorrem durante o ciclo hidrológico e afetam a disponibilidade dos recursos subterrâneos do Sistema Aquífero Bauru (SAB), um dos principais mananciais disponíveis na região do Médio Paranapanema. Os resultados mostraram um comportamento distinto entre os poços localizados sob a mesma formação geológica, mas com usos da terra distintos. Notou-se que em área agrícola os níveis foram mais sensíveis às variações sazonais e às práticas de manejo ali empregadas, denotando células de fluxo local, enquanto que em área de conservação florestal onde não há perturbações antrópicas os dados de monitoramento refletem o escoamento de base em direção à drenagem mais próxima, influenciada principalmente pelo fluxo intermediário/regional das águas subterrâneas.</p>
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Sutasoma, Muwardi, Anjar Pranggawan Azhari, and Meidi Arisalwadi. "IDENTIFIKASI AIR TANAH DENGAN METODE GEOLISTRIK RESISTIVITAS KONFIGURASI SCHLUMBERGER DI CANDI DASA PROVINSI BALI." KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA 3, no. 2 (December 11, 2018): 58–65. http://dx.doi.org/10.20414/konstan.v3i2.8.
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Pengukuran resistivitas secara sounding telah dilakukan di daerah Candi Dasa (CD), Provinsi Bali. Tujuan penelitian ini adalah mengidentifikasi sumber air tanah baru. Untuk menentukan posisi aquifer air tanah bawah permukaan maka dilakukan pengambilan data sounding di dua titik yaitu CD 1 dan CD 2. Metode yang digunakan adalah metode geolistrik resistivitas Konfigurasi Schlumberger dengan panjang lintasan CD 1 dan CD 2 adalah 150 m dengan spasi 1 m. Pemrosesan data dengan menggunakan software IP2Win dan Progress 3 untuk memungkinkan penggambaran distribusi resistivitas batuan dalam 1 D. Hasil interpretasi menunjukkan bahwa struktur batuan bawah permukaan terdiri dari batuan soil, tuff, lava dan sandy tufa. Hasil interpretasi menunjukkan bahwa lapisan batuan yang terdapat terbentuk karena aktifitas vulkanik yang berasal dari aktifitas Gunung Agung yang berada di Kabupaten Karang Asem. Batuan seperti lava dan tuff adalah batuan yang memiliki porositas yang kecil karena memiliki ukuran butiran yang halus dan kecil, memiliki permeabilitas yang rendah sehingga menyebabkan susah untuk menyimpan dan dan mengalirkan air. Lapisan batuan ini diperkirakan berfungsi sebagai lapisan impermeable dan selanjutnya berfungsi untuk menahan air yang mengalir secara horizontal. Selanjutnya, lapisan batuan sandy tufan yang memiliki porositas dan permeabilitas yang besar karena memiliki butiran batuan yang besar bertugas untuk menyimpan dan mengalirkan air.
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Jasman, Jasman, Dismo Katiandaghob, Moningka Dely Natalia, and Ronny Muntud. "HUMAN IMMUNODEFICIENCY VIRUS PADA KOMUNITAS GAY DI KAWASAN MARINA PLAZA KOTA MANADO." Jurnal Kesehatan Lingkungan 9, no. 2 (October 31, 2019): 81–86. http://dx.doi.org/10.47718/jkl.v9i2.670.
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Human Immunodeficiency Virus (HIV) is a virus that causes Aquired Immunodeficiency Syndrome (AIDS) by attacking white blood cells, namely CD4 cells (Cluster of Differentiation 4) that can damage the human immune system. Without the immune system, a person is easily attacked by various diseases. The number of HIV / AIDS sufferers according to data from the Tikala Baru Health Center VCT in 2018 totaled 62 people. The aim of this study is to identify HIV in the Gay Community in the Marina Plaza Area of Manado City.
The method used in this study is the Immunocromatography Test using One Step Anti-HIV. Sampling was carried out in the Marina Plaza Area and immediately examined at the sampling location. The population in this study is the entire Gay Community in the Marina Plaza Area of Manado City with a total population sampling method. This type of research is descriptive, research results are presented in tabular form and narrated.Based on research conducted, it can be concluded that, of the 85 respondents examined there were 1 positive respondent and 84 negative respondents. It is recommended for members of the gay community who are infected with HIV to take ARV (Anti Retroviral) drugs regularly. For gay community members who have not been infected with HIV in order to prevent transmission by using a condom during sex or leaving deviant sexual behavior.
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Barrile, Silvia Regina, Aline Aparecida Ribeiro, Ana Paula Rodrigues da Costa, Ariane Aparecida Viana, Marta Helena Souza De Conti, and Bruno Martinelli. "Comprometimento sensório-motor dos membros inferiores em diabéticos do tipo 2." Fisioterapia em Movimento 26, no. 3 (September 2013): 537–48. http://dx.doi.org/10.1590/s0103-51502013000300007.
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INTRODUÇÃO: A alta incidência do Diabetes mellitus (DM) na população torna essa patologia alvo de muitas pesquisas. Uma das complicações do DM é a neuropatia periférica crônica caracterizada por atrofia e degeneração axonal e/ou alteração da célula de Schwann. A fisioterapia atua na estimulação da regeneração da fibra nervosa, o que reduz o risco de desenvolvimento do pé diabético. OBJETIVO: Identificar o comprometimento da sensibilidade nos membros inferiores (MMII) de diabéticos e verificar fatores que contribuíram para o desenvolvimento do pé diabético, como glicemia, hemoglobina glicada (HbA1c), tempo de diagnóstico, pressão arterial e antropometria. MATERIAIS E MÉTODOS: Os diabéticos foram avaliados na Associação dos Diabéticos de Bauru, participaram de entrevista e foram submetidos a antropometria, triagem pressórica e teste neurossensorial no Sistema Pontuação Clínica Toronto (SPCT). RESULTADOS: Os 68 pacientes (61,76% mulheres e 38,23% homens) tinham 62,93 ± 9,64 anos, apresentaram pressão sistólica de 132,54 ± 17,95 mmHg e diastólica 80,39 ± 11,35 mmHg, índice de massa corpórea 30,34 ± 5,80 kg/m², glicemia 149,20 ± 60,37mg/dL, HbA1c 7,72 ± 1,4%; tempo de diagnóstico de um a 34 anos. Dentre eles, 80,88% apresentavam sobrepeso; 72,06%, hipertensão arterial; 42,64%, dislipidemia; 14,7%, problemas renais; e 17,64%, vasculares. Pelo SPCT, 97,05% apresentavam neuropatia, 95,59% com simetria. Na avaliação, 57,35% apresentavam alteração sensitiva protetora; 60,29%, sensibilidade térmica; 26,47%, tátil; 17,64%, vibratória; 7,35%, dolorosa; e 1,47%, alteração cinestésica. Nos pés, 72,05% apresentavam pele ressecada; 64,70%, fissuras; 54,41%, calosidade; e 44,11%, micose; 50% referiram dor; 39,7%, dormência; 41,17%, parestesia; 27,94%, ataxia. Reflexos estavam ausentes ou diminuídos em 14,71% dos indivíduos; desses, 38,23% no Aquileu. Observou-se correlação positiva entre o SPCT com a glicemia e a circunferência abdominal e a hemoglobina glicada com a glicemia. CONCLUSÃO: Houve grande incidência de neuropatia simétrica; alteração de sensibilidade com presença de sinais clínicos, sintomas, arreflexia e hiporeflexia; e incidência de obesidade e hipertensão associadas. Faz-se necessário o acompanhamento da fisioterapia na avaliação da sensibilidade para prevenir, reduzir sintomas e melhorar a circulação sanguínea em MMII.
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Hafsari, Sari Wulandari, and Akhmad Rading. "Potensi Cadangan Panas Bumi dengan Metoda Volumetrik Pada Sumur Saka-1 Lapangan Panas Bumi “X” Kabupaten Lembata NusaTenggara Timur." Jurnal Offshore: Oil, Production Facilities and Renewable Energy 1, no. 1 (June 1, 2017): 1. http://dx.doi.org/10.30588/jo.v1i1.236.
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<p>Secara geologi Indonesia berada di zona Sabuk Api atau busur vulkanik yang merupakan produk konvergensi berupa subduksi antara lempeng Samudra Hindia-Australia dengan lempeng benua Asia berdasarkan konsep Tektonik lempeng. Potensi Panas bumi Indonesia tercatat sebagai yang terbesar ketiga di dunia dengan potensi cadangan 40%, Direktorat Inventarisasi Sumber Daya Mineral (ESDM) mengidentifikasi 256 daerah panas bumi dengan total potensi mencapai atau sekira 28.617 MW Penggunaan potensi panas bumi Indonesia hingga Tahun 2016 baru mencapai 4% atau sekira 1341 MW sehingga masih perlu ditingkatkan. Target pemerintah tentang kebijakan Energi Nasional terkait penggunaan energi terbarukan sebesar 25% pada tahun 2015, memicu peningkatan kegiatan pencarian dan eksplorasi panas bumi.Penyelidikan Direktorat Inventarisasi ESDM (2006) di Kabupaten Lembata, Nusa Tenggara Timur mencatat tiga lapangan potensi panas bumi yakni : Atadei, Roma dan Adum. Sumber panas bumi umumnya berasosiasi dengan gunungapi menjelang padam maupun masih aktif. Syarat terbentuknya panas bumi adalah adanya sumber panas (magma), batuan reservoir, batuan penudung dan akuifer. Hasil inventarisasi dan eksplorasi. Tulisan ini difokuskan pada perhitungan cadangan yakni energi panas bumi yang kenyataannya dapat diambil dan potensi listrik yang dapat dibangkitkan pada lapangan panas bumi X Kabupaten Lembata, Nusa Tenggara Timur. Tahapan awal dari upaya untuk mengetahui potensi energi panas bumi dimulai dari eksplorasi terencana dan terpadu yang meliputi kegiatan survey geologi, geokimia, geofisika, landaian suhu dan pemboran uji/eksplorasi panas bumi yang diakhiri dengan kegiatan pemboran sumur produksi serta pembangkit power plant untuk listrik jika hasil pemboran uji memberikan gambaran yang positif serta faktor kebutuhan akan energi/listrik.Cadangan energi panas bumi yang kenyataannya dapat diambil di Lapangan panas bumi X adalah 3,94 x 10 11 KJ dan besarnya potensi listrik yang dapat dibangkitkan adalah sebesar 41 Mwe Sehingga Lapangan panas bumi X prospek dan layak untuk dikembangkan sebagai Pembangkit Listrik Tenaga Panas Bumi (PLTP), sehingga kebutuhan listrik masyarakat Kabupaten Lembata sebesar 5 Mwe dapat terpenuhi.</p><p><em>Geologically, Indonesia is in the zone of ring of Fire or volcanic arc which is a product of convergence in the form of subduction between the Indian-Australian Ocean plate and the Asian continent plate based on the plate tectonic concept. Indonesia's geothermal potential is recorded as the third largest in the world with a potential reserve of 40%, the Directorate of Mineral Resources Inventory (ESDM) identified 256 geothermal areas with a total potential reaching or approximately 28,617 MW The use of Indonesia's geothermal potential until 2016 only reached 4% or approximately 1341 MW so that it still needs to be improved. The government's target of the National Energy policy related to the use of renewable energy by 25% in 2015, triggers an increase in geothermal exploration and exploration activities. </em><em>The investigation of the ESDM Inventory Directorate (2006) in Lembata Regency, East Nusa Tenggara recorded three geothermal potential fields namely: Atadei, Roma and Adum. Geothermal sources are generally associated with near-extinguished volcanoes or are still active. Requirements for geothermal formation are the existence of heat sources (magma), reservoir rocks, capstone and aquifers. Inventory and exploration results. This paper is focused on the calculation of reserves, namely the fact that geothermal energy can be extracted and the potential electricity that can be generated in the geothermal of X field, Lembata Regency, East Nusa Tenggara. The initial stages of the effort to determine the potential for geothermal energy starts from planned and integrated exploration which includes geological, geochemical, geophysical surveying, temperature slope and geothermal test/ exploration drilling which ends with the production well drilling and power plant for electricity if the results test drilling provides a positive picture and energy/electricity demand factors. </em><em>Reserve of geothermal energy which in fact can be taken in the geothermal field X is 3.94 x 1011 KJ and the amount of potential electricity that can be generated is 41 Mwe so that the geothermal of X field prospects and feasible to be developed as a Geothermal Power Plant (PLTP) so that the electricity needs of the Lembata Regency community of 5 MWe can be fulfilled.</em></p>
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Boico, Vinicius Ferreira, Edson Wendland, and José Anderson do Nascimento Batista. "Assessment of the potentiometric drawdown in the Guarani Aquifer System in Bauru/SP by a model of analytical elements." RBRH 23 (March 1, 2018). http://dx.doi.org/10.1590/2318-0331.0318170121.
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ABSTRACT The recent drought events and the population growth in São Paulo State (Brazil) have caused many municipalities to increase the groundwater exploitation of the Guarani Aquifer System (GAS) for the public water supply. In Bauru City/SP, the extraction of water from this Aquifer is expected to increase from 3699 m3/h (2014) to 4465 m3/h (2034). However, its long-term overexploitation may compromise the amount of available groundwater. The Analytic Element Method was used for groundwater flow modeling at steady-state, which includes the regional flow, the water withdrawal from wells and the main local geological conditions. The hydraulic gradient 0.82 m/km was estimated in the GAS in Bauru City. The potentiometric drawdown in the GAS in Bauru was estimated as 50 m since the beginning of the groundwater exploitation. The drawdown for the groundwater pumping scenario in 2014 is higher than 15 m in Piratininga and Agudos and lower than 10 m in further cities. The expected drawdown for the scenario of 2034 can reach 15 m in comparison with the scenario of 2014, in the North of Bauru City, where the future wells will be located.
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Santarosa, Lucas Vituri, and Rodrigo Lilla Manzione. "Soil variables as auxiliary information in spatial prediction of shallow water table levels for estimating recovered water volume." RBRH 23 (June 18, 2018). http://dx.doi.org/10.1590/2318-0331.231820170115.
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ABSTRACT Spatial data became increasingly utilized in many scientific fields due to the accessibility of monitoring data from different sources. In the case of hydrological mapping, measurements of external environmental conditions, such as soil, climate, vegetation, are often available in addition to the measurements of water characteristics. An integrated modelling approach capable to incorporate multiple input data sets that may have heterogeneous geometries and other error characteristics can be achieved using geostatistical techniques. In this study, different physical hydric properties of soils extensively sampled and topography were used as auxiliary information for making optimal, point-level inferences of water table depths in forest areas. We used data from 48 wells in the Bauru Aquifer System in the Santa Bárbara Ecological Station (EEcSB), in the municipality of Aguas de Santa Bárbara in São Paulo State, Brazil. Using the resistance of soil to penetration and topography as auxiliary variables helped reduce prediction errors. With the generated maps, it was possible to estimate the volumes of water recovered from the water table in two periods during the monitoring period. These values showed that 30% of the recovered volume would be sufficient for a three-month supply of water for a population of 30,000 inhabitants. Therefore, this raises the possibility of using areas such as the EEcSB as strategic supplies in artificial recharging management.
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Abd. Rahman, Norhan, Samira Albati Kamaruddin, and Bernhard A. Schrefler. "Numerical Modelling of Thermo–Hydro–Mechanical (THM) in Deforming Porous Media for Subsurface Systems." Jurnal Teknologi, January 20, 2012. http://dx.doi.org/10.11113/jt.v34.633.
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Kajian aliran berbilang–fasa dan aliran haba dalam bahantara berliang separa tepu menjadi semakin penting dalam kejuruteraan geomekanik persekitaran kerana ia berkait rapat dengan pengukuhan bahantara berliang itu di dalam zon tidak tepu. Satu model berangka telah dikembangkan untuk menghuraikan masalah terganding haba–hidro–mekanikal (THM) dalam bahan berliang boleh ubah bentuk dengan aliran dua–fasa. Hubungan yang disarankan oleh Brooks dan Corey telah digunakan kepada tekanan rerambut, ketepuan air dan kebolehtelapan air serta gas. Satu kajian lanjutan dibuat ke atas model berangka tersebut berasaskan kod COMES–GEO untuk menyelesaikan masalah yang berlaku dalam zon tak tepu di medan telaga Kg. Puteh, Kota Bharu, Kelantan iaitu sebuah akuifer cetek yang berpotensi untuk mengeluarkan bekalan air bumi terbanyak di daerah Kota Bharu. Untuk menunjukkan model dan prosedur penyelesaiannya, rumusan pelaksanaan berangka dan contoh–contoh masalah dibincangkan di dalam kajian ini. Kata kunci: Aliran berbilang-fasa; aliran haba; bahan berliang boleh ubah bentuk; model berangka;zon tidak tepu; haba-hidro-mekanikal. The study of multiphase flow and heat flow in partially saturated porous media is important in environmental geomechanics engineering because of its relevance to consolidation of porous media in unsaturated zone. A numerical model which describes the thermo–hydro–mechanical (THM) coupled problems in deformable porous material with two–phase flow has been developed. The relationships between capillary pressure, saturation of water and relative permeabilities of water and gas, proposed by Brooks and Corey was used. An extended study of the numerical model, based on the COMES–GEO code was conducted recently to solve unsaturated problems in local condition of Kg. Puteh wellfield, Kota Bahru. This site is a potential shallow aquifer which contribute to the largest groundwater supply in Kota Bahru, Kelantan. Some numerical investigation on the proposed formulation is discussed with illustrative example problems to demonstrate solution procedures and validating of the model. Key words: Multiphase flow; heat flow; deforming porous media; numerical model; unsaturated zone; thermo-hydro-mechanical.