15 research outputs found
Fenomena Intrusi Air Laut di Daerah Pesisir Hunuth, Kecamatan Teluk Ambon, Kota Ambon, Maluku
One of the research areas to determine the phenomenon of seawater intrusion through analysis of the physical and chemical characteristics of groundwater is in the Coastal area of Hunuth Village, Teluk Ambon District, Ambon City, Maluku. The coastal community of Hunuth Village utilizes groundwater to meet their daily water needs. However, due to the existence of residential areas close to the coast, the groundwater in this area has been polluted or intruded by sea water.The results showed that groundwater with high pH values was shown in areas far from the shoreline (northern part of the study area), while high TDS, salinity and DHL values were generally found in groundwater samples close to the shoreline. The groundwater facies in the study area show the types of Ca-HCO3 (calcium and bicarbonate), types of Na-HCO3 (sodium and bicarbonate), and types of Na-Cl (sodium and chloride). Areas close to the shoreline have experienced seawater intrusion as indicated by DHL values > 229.25 mho/cm, Cl/HCO3 ratio values which are generally > 2.80 meq/l, and groundwater facies with the type of Na-Cl (sodium and sodium chloride). Therefore, it is necessary to treat water before it is used as drinking water, buy bottled drinking water or use the services of a water company for polluted wells, and build a dam in the northern part of the study area which has a flat topography. trees to retain water, so that fresh water can easily push salt water into groundwater aquifers in the study area
Studi Komparasi Intrusi Air Laut di Dusun Airlouw dan Dusun Erie, Desa Nusaniwe, Kecamatan Nusaniwe, Kota Ambon Berdasarkan Parameter Fisik-Kimia Airtanah
One of the environmental problems often faced by residents in coastal areas is sea water intrusion. The research area is a coastal area so it is very possible for seawater intrusion to occur. This study aimed to determine the hydrogeological system of the research area, and to compare the stretch of intrusion in Airlouw and Erie Village using physical-chemical parameters of groundwater through wells owned by local residents. The research area geology is dominated by Ambon volcanic rocks units, ultramafic rocks and coral limestones. The aquifer system in the study area is an highly to moderately productive aquifers. The lithology that becomes the aquifer is igneous rock in the form of weathering of Ambon volcanic rocks. The results of a comparative study in the research area, based on physical-chemical parameters which include pH, salinity, DHL and TDS values in the: (a) Airlouw Village is characterized as brackish water; whereas (b) Erie Village is characterized as fresh water. Based on the comparison of DO value shows that: (a) Airlouw Village is generally moderately polluted except for SB3 (DO>6.5); whereas (b) Erie Village is not polluted except P6 is moderately polluted (DO:2.0-4.4). Groundwater on: (a) Airlouw Village shows Cl+SO4 facies which indicates of seawater intrusion; whereas (b) Erie Village shows that the Ca-Mg-HCO3 facies has no indicates of seawater intrusion
Karakterisasi Akuifer dan Analisis Parameter Fisik-Kimia Airtanah Daerah Pesisir Waai, Kecamatan Salahutu, Kabupaten Maluku Tengah
Ketersediaan airtanah untuk pemenuhan kebutuhan jangka Panjang penduduk Daerah Pesisir Waai akan dapat terpenuhi jika keadaan akuifer dan airtanah diteliti. Berdasarkan hal tersebut, penelitian ini bertujuan untuk mengetahui karakteristik akuifer dan kondisi fisik-kimia airtanah di Pesisir Waai. Metode yang digunakan adalah interpretasi kondisi geologi, pemodelan geolistrik, serta pengukuran nilai pH, TDS, EC, dan salinitas. Selanjutnya dilakukan analisis sebaran dan klasifikasi nilai tiap parameter serta analisis hubungan antar parameter. Hasil penelitian menunjukkan bahwa akuifer di Pesisir Waai meliputi akuifer bebas dan akuifer tertekan yang tersusun atas sedimen pasir dengan porositas istimewa (33,2%) dan permeabilitas sedang (1,35×10-2), akuitar yang tersusun atas sedimen pasir dan kerikil dengan porositas istimewa (28%) dan permeabilitas sedang (3,29×10-2), serta akuiklud yang tersusun atas sedimen lempung dengan porositas istimewa (48,8%) dan permeabilitas sedang (0,559×10-2). Adapun airtanah dengan nilai pH paling rendah terdapat pada bagian selatan daerah penelitian, sedangkan kandungan TDS, EC, dan salinitas tinggi berada pada airtanah di area pantai. Berdasarkan data geologi dan karakteristik akuifer, maka dapat diketahui bahwa kondisi lingkungan dan batuan penyusun akuifer berpengaruh terhadap parameter fisik-kimia airtanah
Identifikasi Intrusi Air Laut Berdasarkan Parameter Fisik-Kimia Airtanah Daerah Pesisir Lateri, Kota Ambon
Daerah penelitian berada di pesisir Desa Lateri yag terletak di Kecamatan Teluk Ambon Baguala, Provinsi Maluku. Daerah ini merupakan daerah pemukiman yang sumber air bersih berasal dari airtanah, namun daerah ini tidak terlepas dari permasalahan fenomena intrusi air laut. Tujuan penelitian ini untuk menganalisis kondisi airtanah dan mengidentifikasi intrusi air laut berdasarkan parameter fisik-kimia airtanah Daerah pesisir Lateri. Studi hidrogeologi mengenai airtanah terutama parameter fisik- kimia airtanah, seperti TDS, DHL, salinitas, pH dan rasio Cl/HCO3 dapat dilakukan untuk menganalisis kondisi hidrogeologi dan identifikasi intrusi air laut pada Daerah pesisir Lateri. Geologi Daerah Lateri terdiri dari dua formasi, yaitu formasi batugamping koral dan batuan gunung api Ambon, batuan tersebut juga tersingkap di Daerah Lateri. Kedua formasi tersebut menunjukkan tipe akuifer bebas dengan batugamping koral sebagai akuifer dan batuan gunung api Ambon sebagai akuifug. Hasil penelitian menunjukkan terdapat tiga fasies airtanah yaitu Ca-HCO3, Ca(Mg)-Cl dan Na-HCO3. Sedangkan untuk parameter TDS, DHL dan salinitas menunjukkan terdapat dua sampel yang terindikasi telah mengalami intrusi air laut dengan tingkat yang tinggi dan sangat tinggi. Serta berdasarkan analisis kimia, Fasies Ca(Mg)-Cl merupakan fasies yang airtanahnya terkontaminasi air laut atau mengalami fenomena intrusi air laut
ANALISIS KESTABILAN LERENG BATUAN DENGAN MENGGUNAKAN KLASIFIKASI MASSA BATUAN DI DAERAH HATIVE BESAR
Desa Hative Besar memiliki wilayah yang berlereng dengan formasi batuan adalah batuan vulkanik. Bagian cover batuan ini telah mengalami pelapukan sehingga dimanfaatkan oleh masyarakat untuk keperluan penambangan. Dalam melakukan kegiatan penambangan, kualitas massa batuan harus diperhatikan karena merupakan metode empiris untuk memprediksi stabilitas lereng yang diamati. Kehadiran kekar maupun retakan pada batuan akan menyebabkan ketidakstabilan pada lereng. Kestabilan lereng ditentukan dengan menggunakan klasifikasi massa batuan dengan parameter yang diambil dari nilai kuat tekan batuan, RQD, jarak antar bidang diskontinu, kondisi diskontinu, dan kondisi air tanah yang mewakili massa batuan. Penelitian yang telah dilakukan ini bertujuan untuk mengkaji kestabilan lereng batu pasir dengan menggunakan metode klasifikasi massa batuan. Hasil penelitian menunjukkan bahwa nilai Slope Mass Rating (SMR) pada formasi lereng terdistribusi sesuai tipe massa batuan yang tepat dengan nilai SMR sebesar 75,5 dan tergolong Tipe II yang menggambarkan lereng batuan stabil dan lereng berada dalam kondisi stabil. keadaan baik. Untuk nilai Rock Mass Rating (RMR) memiliki nilai sebesar 68 dan tergolong Tipe II, asalkan lereng stabil dan tidak memerlukan penyanggaan
Penerapan Teknologi Penginderaan Jauh untuk Kajian Indeks Kerapatan Vegetasi (NDVI) Tahun 2020 di Kecamatan Sirimau
This study aims to examine the distribution of vegetation density in Sirimau District using the NDVI method calculated from Landsat 8 satellite imagery. Landsat 8 imagery is processed to obtain NDVI values that describe the level of vegetation density and health in the study area. The results of the analysis show that most of the Sirimau District area is dominated by dense vegetation with NDVI values between 0.63 and 0.80 covering around 57.8% of the total area. In addition, vegetation is quite dense with NDVI values between 0.42 and 0.63 and vegetation is not dense with NDVI values between 0.21 and 0.42 occupying around 20.4% and 14.7% of the area, respectively. While non-vegetation and clouds and air only occupy a small part of the area with percentages of 7.1% and 0.003% of the total area, respectively. This study proves that the use of remote sensing technology, especially Landsat 8 imagery, is effective in mapping and integrating vegetation conditions quickly and accurately. The results of this study are expected to support natural resource management and spatial planning in Sirimau District
Geology and Land Suitability Analysis for Final Processing Waste Site in Ambon Island
From 2017 to 2021, waste production in Ambon City increased from 200 tons/day to 297 tons/day, but the condition of the Toisapu landfill in Ambon did not support this. Toisapu landfill, which has been operating since 2007, is now in overload status and needs to be re-evaluated because it is on a slope of >20% and is located close to residential areas. This research aims to find an alternative replacement for the Toisapu landfill with the status of a Waste Processing and Final Processing Site that complies with Indonesian National Standards. This research uses an environmental geology approach based on Spatial Multi-Criteria Evaluation (SMCE), which combines geological and non-geological parameters. The analysis results for each parameter are overlaid, given a value, and then totaled to produce the most feasible land. The results of this research show that the most suitable land is in Wakal with an area of 126,668 ha. The permeability of this location is low, with the groundwater being quite deep (>80 meters), so there is little chance of leachate seepage contaminating the groundwater. In contrast to the Toisapu landfill, Wakal has a slope of <20%, far from protected forests and where residents live
SEPARATION OF ETHANOL-WATER AZEOTROPE MIXTURES USING EXTRACTIVE DISTILLATION METHOD
Extractive distillation is a specialized distillation process that involves adding an additional component (extractive agent or solvent/entrainer) to the mixture in order to alter the relative volatilities of the components and enable their separation, even when they form azeotropes. This technique is commonly used to separate azeotropic mixtures, such as ethanol-water azeotropes. The ethanol-water azeotrope is a well-known example, where the mixture contains around 95.6 wt% ethanol and 4.4 wt% water. Traditional distillation methods cannot separate these components efficiently due to the azeotropic behavior. However, extractive distillation offers a solution by introducing a third component (entrainer) that forms a ternary azeotrope, which has different properties compared to the binary azeotrope (ethanol-water). This study presents the effect of the operating parameters (e.g., column configuration, pressure, entrainer type) on energy consumption while the purity of ethanol is set to 99.5 wt%. Appropriate entrainers (i.e., glycerol, ethylene glycol) are chosen to extract water from methanol at different compositions. The optimum design of ethanol-water azeotrope separation is obtained by using sensitivity analysis in Aspen Plus simulation. The results indicate the trade-off between solvent and reboiler duty consumption. An advanced comparison study is recommended, including the mixing of both solvents as entrainer
Identifikasi Kondisi Geologi dan Kualitas Airtanah di Desa Pelauw, Kecamatan Pulau Haruku, Kabupaten Maluku Tengah
Pemenuhan kebutuhan air di Desa Pelauw sebagian besar bergantung pada air sungai dan airtanah. Namun ada sebagian masyarakat di Desa Pelauw kesulitan mendapatkan sumber air, sebab beberapa sumur gali memiliki sifat fisik payau. Oleh karena itu, penelitian ini bertujuan untuk mengidentifikasi kondisi geologi dan kualitas airtanah di Desa Pelauw, Kecamatan Pulau Haruku. Metode yang digunakan adalah interpretasi kondisi geologi, dan parameter fisik-kimia airtanah. Selanjutnya dilakukan klasifikasi nilai tiap parameter. Hasil penelitian menunjukkan bahwa Daerah penelitian di Desa Pelauw berada pada Satuan Endapan Aluvium (Qa), Batugamping Koral (Ql), dan Batuan Gunungapi Ambon (Tpav). Sistem hidrogeologi Desa Pelauw memiliki akuifer produktivitas sedang, akuifer produktivitas tinggi-sedang, dan akuifer produktif dengan pola aliran airtanah mengalir dari arah selatan ke utara dan intensitas curah hujan menengah. Kualitas air berdasarkan Permenkes No. 492 Tahun 2010 memiliki kondisi air tawar dengan nilai EC (138-1953 µs/cm), TDS (64-872 ppm), dan salinitas (0-2,84%), kondisi air payau dengan nilai EC (2072-2712 µs/cm), TDS (1.342-2.474 ppm), dan salinitas (4,04-5,42%), pH air layak minum dengan nilai 7,30-8,42 dan pH basa pada 8,63-8,56. Sampel airtanah pada pada daerah penelitian berasal dari adanya interaksi antara air dengan material penyusun akuifer
