26 research outputs found
Fenomena Intrusi Air Laut di Daerah Pesisir Hunuth, Kecamatan Teluk Ambon, Kota Ambon, Maluku
No full textOne 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
No full textOne 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
Identifikasi Intrusi Air Laut Berdasarkan Parameter Fisik-Kimia Airtanah Daerah Pesisir Lateri, Kota Ambon
No full textDaerah 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
Karakterisasi Akuifer dan Analisis Parameter Fisik-Kimia Airtanah Daerah Pesisir Waai, Kecamatan Salahutu, Kabupaten Maluku Tengah
No full textKetersediaan 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
OPTIMASI INJEKSI BIOSURFAKTAN PADA PENINGKATAN PEROLEHAN MINYAK MELALUI SIMULASI CORE FLOODING
No full textPeningkatan perolehan minyak (EOR) merupakan teknologi penting untuk memaksimalkan produksi dari reservoir yang telah mengalami penurunan laju produksi. Salah satu metode EOR yang berkembang adalah penggunaan biosurfaktan, yang dinilai lebih ramah lingkungan dibanding surfaktan sintetis. Penelitian ini bertujuan menentukan skenario paling optimum penggunaan biosurfaktan rhamnolipids untuk meningkatkan perolehan minyak melalui simulasi core flooding skala laboratorium. Simulasi dilakukan menggunakan CMG STARS pada model kartesian 3D batu pasir Berea dengan variasi parameter utama, yaitu konsentrasi biosurfaktan, laju injeksi, dan urutan injeksi slug. Rhamnolipids mampu menurunkan tegangan antarmuka minyak-air, sehingga meningkatkan efisiensi perpindahan minyak dari pori-pori batuan. Hasil simulasi menunjukkan bahwa konsentrasi optimum adalah 14 %b/b dengan faktor perolehan (RF) tertinggi sebesar 40.15 %. Laju injeksi optimum ditemukan pada 1 cm³/menit, menghasilkan RF 48.53 % dalam rentang laju yang memungkinkan untuk uji core flooding laboratorium. Untuk skenario injeksi berulang air dan biosurfaktan, hasil terbaik diperoleh pada pola injeksi yang diawali dengan air, diikuti biosurfaktan, lalu diulang sekali lagi (W-B-W-B), dengan RF tertinggi 51.25 %. Temuan ini memberikan acuan penting untuk desain injeksi biosurfaktan pada tahap percontohan skala lapangan
Penerapan Teknologi Penginderaan Jauh untuk Kajian Indeks Kerapatan Vegetasi (NDVI) Tahun 2020 di Kecamatan Sirimau
No full textThis 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
Hourly Matching of renewable electricity production with demand of large-scale electricity consumers
No full textThis research aims to provide a method for large-scale commercial electricity consumers to procure towards 100% hourly matched renewable electricity. A problem with the current electricity balancing system is that the energy produced by Variable Renewable Energy sources (VRES), such as wind and solar PV, has a weather-dependent production profile and is thus non-controllable and intermittent. The balance between the total energy demand of the large-scale electricity (LSE) consumer and the production of electricity from VRES in their contract is only based on a yearly scale and not on an hourly scale. At moments when there is little wind, mainly coal & gas- powered plants need to be dispatched to secure uninterrupted power supply. Procurement of renewable energy is realized with the use of Guarantees of origin (GOs). GOs are an instrument that tracks the origin of electricity generated from renewable resources on a yearly basis but does not differentiate in hourly production profile. Therefore, this system will not be able to address the challenge of balancing VRES and demand on an hourly scale. In the future, with the ambition of moving towards substantially higher proportion of RES, the balancing on hourly base is needed to decrease the dependency on the conventional plants as backup. Therefore, with the current setup with yearly tracked RES, companies are limited in their role in the energy transition. This research aims to provide a novel method for large-scale commercial electricity consumers to procure towards 100% hourly matched renewable electricity. In this thesis, a techno-economic analysis was conducted to examine possible hourly-matched renewable energy portfolio for Dutch LSE consumers. First, an analysis was conducted of the production and storage technologies that could potentially be used for the application of hourly matching. Secondly, a methodology was developed to analyse the match between an LSE consumer’s demand and the production profile. The degree to which these profiles are matched was defined as the green score. The higher the green score, the higher the percentage of the demand that is covered by the portfolio on an hourly base. The demand profile is kept consistent, and a comparison is made of scenarios of different portfolios containing production and storage technologies. Third, using a Levelised Cost of Portfolio (LCOP) the cost per MWh for the whole portfolio is compared for different scenario’s. This study shows that the hourly match measured using the percentage green score can be significantly increased by adapting the LSE consumer portfolio, however a 100% hourly match is not shown. Much of the research to date has focused on national-scale scenarios, but only provides limited incentives and insights into the role that large companies can play. This study provides a tool which is suitable to perform a techno-economic analysis to increase the hourly match of LSE consumers using various electricity production and electrical energy storage technologies. The insights found on the impact of different combinations of technologies in a portfolio can be used to understand a further possible role of these companies in the energy transition.Industrial Ecolog
Geology and Land Suitability Analysis for Final Processing Waste Site in Ambon Island
No full textFrom 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
Mindfulness training for smoking cessation in adults participating in Alcoholics Anonymous
No full textPurpose: Smoking is the leading cause of preventable disease. Smokers die an average of ten years earlier than individuals who do not smoke. Over 34 million adults in the United States smoke. The goal of this study is to use mindfulness training to increase smoking cessation rates.
Methods: This quality improvement study examined the effectiveness of mindfulness training exercises and smoking cessation rates in adults who attended an alcoholics anonymous meeting in Central New Jersey. Participants completed a pre-test and were then taught how to use mindfulness training exercises when the urge to smoke a cigarette arises. After four weeks of using mindfulness training, the same participants completed a post-test to examine whether mindfulness training exercises aided in smoking cessation.
Results: This study showed that the mean number of cigarettes smoked in a day decreased from 17.5 to 14.77 (n=44, p=<0.001, 95% CI) after mindfulness training exercises were used. There was a 15.58% change in the number of cigarettes smoked after using the mindfulness training exercises. 70.4% of participants in this study found mindfulness training helpful in smoking cessation.
Implications: This study showed a statistically significant reduction in the number of cigarettes smoked after mindfulness training exercises. Mindfulness training was more effective with individuals who have smoked for five years or less. Habit and stress were shown to be the main reasons why individuals in this study smoked. There was no correlation between living with a smoker and cessation rates.D.N.P.Includes bibliographical reference
ANALISIS KESESUAIAN LAHAN UNTUK PERMUKIMAN DAN PARIWISATA BERDASARKAN ASPEK GEOLOGI LINGKUNGAN DENGAN METODE SPATIAL MULTI-CRITERIA EVALUATION (SMCE) DI DAERAH KECAMATAN NUSANIWE, KOTA AMBON
No full textLahan adalah sumber daya yang terbatas dan harus dimanfaatkan sesuai dengan daya dukung lingkungannya. Kecamatan Nusaniwe memiliki potensi sumber daya geologi dan rawan akan bencana geologi, sehingga diperlukan analisis kesesuaian lahan terutama untuk permukiman dan pariwisata. Beberapa hal yang menjadi alasan penelitian ini dilakukan antara lain; pembangunan permukiman pada Kecamatan ini belum merata, terdapat banyak lokasi pariwisata dan morfologinya di dominasi oleh lereng yang curam dan pesisir pantai. Penelitian ini menggunakan metode Spatial Multi-Criteria Evaluation (SMCE) untuk menganalisis kesesuaian lahan permukiman dan pariwisata. Dari hasil penelitian, menunjukkan bahwa lahan yang sesuai untuk dijadikan lokasi pembangunan permukiman, antara lain; 0.7 km² di Desa Amahusu, 1.25 km² di Negeri Nusaniwe, 1.5 km² di Desa Latuhalat, 0.07 km² di Kelurahan Waihaong, 2.04 km² di Negeri Urimessing, 0.2 km² di Kelurahan Mangga Dua, 0.1 km² di Kelurahan Urimessing, 0.45 km² di Kelurahan Kudamati, 0.41 km² di Negeri Seilale, 0.6 km² di Kelurahan Benteng, dan 0.32 km² di Kelurahan Nusaniwe. Sedangkan untuk pariwisata terdapat empat lokasi yang cukup sesuai dan memiliki nilai keragaman geologi (geodiversity) yaitu Bukit Paralayang, Pantai Pintu Kota, Pantai Tanjung Nusaniwe dan Pantai Batu Lubang. Keempat lokasi ini berpotensi untuk dilakukan pengembangan geopark pada kawasan wisata tersebut
