Jurnal Sains Teknologi dan Lingkungan (JSTL)
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Alih Fungsi Lahan di Kawasan Pariwisata Nusa Penida
Get PDFNusa Penida is part of the Province of Bali which consists of three small islands, namely Nusa Penida Island, Nusa Lembongan and Nusa Ceningan within the administrative area of Nusa Penida District, Klungkung Regency. The development of tourism in Nusa Penida has increased access to physical development and supporting facilities for the region. The leap of development of tourism facilities began to be felt starting in 2005, namely on the islands of Nusa Lembongan and Nusa Ceningan. The development of massive tourism facilities took place in 2015 until 2019 since the 2014 Nusa Penida Festival was held. Many coastal and inland areas were built with tourism accommodation, which naturally led to land conversion and land depreciation. The purpose of this study was to determine land use change from 2003 to 2019 using the overlapping analysis method of Google maps and maps derived from quick bird imagery. Transfer of land functions in the Nusa Penida Region from 2003 to 2019 reached 164.84 ha or the rate of land use change that occurred in the Nusa Penida Region was 0.85%
Karakter Tanaman Kelor (Moringa oleifera Lam.) Aksesi Kabupaten Lombok Utara
Get PDFThe research aims to describe the morphological character and determine the genetic relationship among the Moringa oleifera Lam. accessions grown and develop in North Lombok Regency. The study was conducted in February-May 2017, using descriptive methods and direct surveys and purposive sampling with the observation sheets and questionnaires consisting of 38 accession samples. Data were analyzed using Hierarchical Cluster Analysis SPSS 16 program. The results shows that the closest gentic relationship was between Bayan-3 and Bayan-4 accessions with a coefficient value of 12.21 and the farthest between Pemenangr-1 and Gangga-2 accessions with coefficient values of 70.77. Among of the 38 accessions observed, it was divided into 8 groups, and at the phenon distance line 25 there was a merger between the Ganga-2 accessions and other accession groups. There was a close level of geetic relationship among the moringa plant accessions in North Lombok Regency
Kesesuaian Zonasi Pulau-Pulau Kecil : Studi Kasus Kawasan Konservasi Gili Sulat Gili Lawang Lombok Indonesia
Get PDFGili Sulat Gili Lawang are small islands that have high marine biodiversity and have been designated as a Marine Tourism Park (TWP) covering an area of 10,000 hectares. This study aims to analyze the suitability of zoning and analysis of space use in each zone. The data was collected by using a structured interview technique using a questionnaire and Focus Group Discussion (FGD) approach. Zoning suitability analysis used a Geographic Information System (GIS). The assessment showed that the conditions of the mangrove ecosystem, coral reef ecosystem and seagrass ecosystem were in the bad to good categories. Based on the zoning suitability analysis of 193.83 hectares (44.02%) of the coral reef area suitable for the core zone, 143.33 hectares (32.55%) consists of 108 hectares of coral reef ecosystems and 35.43 hectares of seagrass ecosystems suitable for the zone. limited use, and 9,666.47 hectares are suitable for other zones consisting of a coral reef rehabilitation zone covering an area of 93.11 hectares, a protection zone of 93.11 hectares and other waters 8,585.76 hectares
Respon Pertumbuhan dan Hasil Tanaman Wortel (Daucus carota L.) di Dataran Rendah pada Berbagai Volume Media dan Dosis Ampas Padat Biogas
Get PDFThis study aimed to determine the growth responses and yield of carrot (Daucus carota L.) grown at the lowland at various rates of biogas solid waste and media volumes. The experiment was carried out at Mataram University experimental field in Narmada, West Lombok, NTB with an altitude of 136 m above sea level, from April to July 2019. The experiment was designed according a factorialy Randomized Completed Block Design (RCBD). The first factor consisted of 4 volumes of the media which i.e: 2000 cm3/20 x 20 cm, 4000 cm3/25 x 25 cm, 5000 cm3/30 x 25 cm and 7000 cm3/30 x 30 cm. The second factor consisted of 3 levels of biogas solid waste (bio-slurry) with i.e: 10 tons/ha, 15 tons/ha, and 20 tons/ha. These two factors were combined resulted in 12 treatment combinations. Each treatment was repeated so there was 36 experimental units each with replicate. The results showed that the rates of bio-slurry affected the rate of increase in carrot leaf length and did not significantly affect the other parameters or yield of carrot plants in the lowlands. Rates of 10 tons/ha and 20 tons/ha produced a higher leaf length than 15 tons / ha. The media volumes influenced the rate of increase in leaf length, rate of increase in the number of leaves, plant fresh weight, dry tap root weight and tap root length. The media volume of 5000 cm3 and 7000 cm3 resulted higher growth and yield of carrot plants in the lowlands rates of the media volume of 2000 cm3 and 4000 cm3. There was no interaction between the bio-slurry rates and the media volumes in influencing the growth and yield of carrot plants in the lowlan
Karakteristik Marshall pada Campuran Aspal Dingin dengan Asbuton Akibat Dari Penggunaan Aditif Wetfix-BE
Get PDFWest Nusa Tenggara Province consists of two main islands namely Lombok and Sumbawa. Regency Roads on Lombok Island, especially rural roads, has been severely damaged due to lack of routine maintenance. The types of damage that occur are cracks, small holes, and even large pools that endanger road users. This study aims to obtain a mixture of new materials in order to obtain an easy and fast repair method without reducing the quality during its intended life. In the meantime, repairing with CAD (cold asphalt mixture) requires curing time of 3x24 hours to achieve standard material quality with Marshall Characteristics according to the 2010 Bina Marga Specifications. This study combines CAD using BP (rejuvenating agent) and Wetfix-BE additive to get optimal results without curing process. The BP used is asphalt mixture, kerosene, and bunker oil stirred in a mixing machine into one unit. The results showed the optimum concentration of this mixture was 0.3% wet-be additive, 4.50% BP in CAD with asbuton proportion of 25%. In the fatigue test with a cyclic loading of 100 kPa, the pavement mixture is able to resist a fully loaded truck of 7731 times. In conclusion, this mixture combination is able to speed up the asphalt binding time by making briquettes according to the 2018 Highways Specifications without going through the long curing process
Tinjauan Durabilitas Campuran Asphalt Concrete Wearing Course Menggunakan Aspal Tua Dengan Berbagai Bahan Peremaja
Get PDFAsphalt concrete wearing course is laid on the top of road pavement so that directly exposed to ultra violet light and other environment impact. The higher temperature at the pavement surface and exposure to atmospheric oxygen accelerated aging cause asphalt to stiffen and become brittle. This aging result decrease the binding of asphalt and aggregate leads various damage of pavement. The aged asphalt rejuvenated and recycled with rejuvenating agent has been developed to reduce the use of virgin material for road maintenance. This article aims to review durability of asphalt concrete wearing course using waste cooking oil, epoxy resin, kerosene and waste engine oil as asphalt rejuvenators. Aging asphalt was prepared by heating in an oven at 85 oC for 120 hours (long term oven aging). Durability was assessed from the value of Marshall immersion which represent the resistance of asphalt mixture at water immersion. Relation between Marshall immersion and voids in mix (VIM), voids in the mineral aggregate (VMA), voids filled with bitumen (VFB) and density are also evaluated. From the analysis, it can be concluded that the use of waste cooking oil, epoxy resin, kerosene and waste engine oil as asphalt rejuvenators increase the durability of asphalt mixture containing the aged asphalt
Kelimpahan dan Keanekragaman Spesies Echinodermata sebagai Indikator Fungsi Ekologi Lamun di Perairan Pesisir Lombok Timur
Get PDFSeagrasses are plants in the marine environment and have a vital function for the survival of organisms. This study aims to describe the indicators of the seagrass ecological function of the diversity of echinoderms species. The research method used is the method of line and square transects. Data analysis uses analysis of abundance (Ki), diversity (H ') Shannon Wieners, Morisita Dispersion Index, and Jaccard Index. The results showed that the highest seagrass species found at Lungkak beach were 8 species and the lowest was in the Mangrove Poton of 6 species. Furthermore, the number of species of Echinoderms found was 14 species, and the species with the highest abundance was Diadema setosum with a value of 1.21 Individual / m2, and the species that had the lowest abundance was Holothuria scabra) with a value of 0.01 Individual / m2. Meanwhile, the location with the highest value H 'is in Gili Kere with a value of 1.76, and the location with the lowest value of H' is in Lungkak with a value of 1.01. Furthermore, the value of the Seagrass Morisita Dispersion Index and Echinoderms in the study area had a uniform and grouped pattern. The quantitative and qualitative values obtained are a form of seagrass ecological contribution to the sustainability of Echinoderms in the study location. Therefore, the results of this study can be a scientific basis for the importance of the existence of seagrass beds, especially for the sustainability of marine life such as species of Echinoderms
Karakterisasi Buah Mangga Berdasarkan Nilai Dielektrik Menggunakan Teknik Double-Ring Resonator
Get PDFMango is one of the agricultural products in West Nusa Tenggara Province. The quality of post-harvest mangoes also needs to be known so that the quality produced can be maintained. Fruit quality in the tropics can be seen from the respiration rate, hardness, weight loss, total soluble content (TSC), discoloration and acid content. In addition, the quality of post-harvest mangoes can also be detected using sensors that emit microwaves with a certain value. This technique is non-destructive so it does not damage the object used. Double-ring resonators are used as sensors to detect the characteristics of mangoes. Vector Network Analyzer (VNA) is used as a tool to produce S11 and S21 skatering values, then the skatering values are processed into dielectric values. The test was carried out on the type of Gincong Gincu Mango which was divided into 4 categories, namely ripe mango on the tree, very ripe, thick and raw. Double ring resonator sensor can detect and distinguish the maturity level of mangoes based on the value of S21 in the frequency range of 0.39 to 0.49 GHz. In that frequency range, the average gain value of ripe on tree is -21.4 dB, over ripe is -22.8 dB, early ripe is -25.4 dB and unrip mango is -33.4 dB. While the characterization of mangoes using impedance values can be seen in the frequency range of 0.41 - 0.47 GHz. The average impedance value of ripe on tree is about 0.073, over ripe is about 0.067, early ripe is about 0.057 and unripe mangos is about 0.03
Pengaruh Industri Batubara Terhadap Polusi Udara dalam Keseimbangan World Air Quality Index in India
Get PDFThe research was conducted on the researcher's curiosity on various environmental problems that arise as a result of the condition of the earth that is no longer able to sustain all the needs and desires of humans are infinite. But to avoid too much discussion, research will focus on how coal's role in contributing to high levels of air pollution in India. Air pollution is one of the environmental problems that often gets the world's attention. Talking about air pollution must be very closely related to the State of India, whose position as the country with the worst levels of pollution in the world. The method in this study uses a type of qualitative method with the source of data in the form of a literature review that is journal articles that have relevance to the research topic. The data obtained through the literature review will then be carried out data analysis with data reduction stages, data presentation and drawing conclusions. Based on the results of the study it can be seen that coal is the belle of fuel used by India as a support for the large energy needs of Indian society. Indeed, coal's natural resources have a positive impact on the economic situation and conditions of energy security in India, but there are more urgent things that need attention that is related to the negative impact of coal use in the form of pollution which is very dangerous for the survival of Indian society. Therefore, to protect the public from the worsening air conditions in India requires serious efforts from various groups, especially the governmen
Aktivitas Antibakteri dari Ekstrak Etanol Ganoderma sp. Asal Pulau Lombok
Get PDFThe use of antibiotics that are not according to the rules and antibiotics in the long term can cause resistance to bacteria. This study aims to determine the presence of antibacterial activity and the effect of increasing the concentration of ethanol extract of Ganoderma sp. against several test bacteria. Extract from Ganoderma sp. obtained by maceration method using ethanol 95% solvent. The extract concentrations used were 20%, 40%, 60% and 80%. This research was conducted using the wells method with ciprofloxacin as a positive control and 50% DMSO as a negative control. The parameter measured is the large diameter of the inhibition formed around the well. The results of the antibacterial activity test of ethanol extract Ganoderma sp. has greater inhibitory activity against gram-negative bacteria. The inhibitory activity of ethanolic extract of Ganoderma sp. on the growth of test bacteria increased with increasing concentration of the extrac