Jurnal Sains Teknologi dan Lingkungan (JSTL)
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Komparasi Perubahan Tutupan Lahan di Gili Meno, Gili Trawangan dan Gili Air (Gili Matra): Comparison Land Cover Change in Gili Meno, Gili Trawangan dan Gili Air (Gili Matra)
Get PDFThis research aims to determine changes in land cover on Gili Meno, Gili Trawangan, and Gili Air as small islands in West Nusa Tenggara Province. The method used in this research is a qualitative descriptive method in comparing land cover changes on each island and also spatial analysis using Google Earth satellite image data in 2013 and 2022. The research results show seven land cover classifications consisting of built-up land, open land, stretches of beach sand, water bodies, plantations, bushes, and mangroves. Based on the analysis of land cover changes in Gili Trawangan, Gili Meno, and Gili Air, a trend of increasing built-up land area for ten years from 2013 to 2022. The most significant increase in built-up land occurred on Gili Trawangan, namely 48.14 Ha. It was followed by Gili Air and Gili Meno, respectively 24.86 ha and 23.71 ha. The driving factor for changes in land cover on Gili Matra is policies from the central, provincial, and regional governments regarding the promotion and establishment of Gili Matra as a tourism destination in NTB Province. Furthermore, this policy impacts the growth of tourists and the number of residents. It causes an increase in the need for tourism-supporting facilities. Therefore, there is a change in land cover, which gradually reduces the area of undeveloped land on Gili Matra
Pemodelan Redaman Hujan Sebagai Parameter Power Link Budjet Pada Base Transceiver Station (BTS) Jaringan 5G : Modeling Rain Attenuation as a Budjet Power Link Parameter in 5G Network Base Transceiver Station (BTS)
Get PDFRain is a natural phenomenon that occurs in tropical climates during the period it occurs which is a nuisance in wireless communications. The research focus for 5G communications is ongoing to be able to overcome or mitigate rainy conditions. Rain data from satellite images is taken in the form of processed images with different color degradation. The resulting rainfall data is then converted into rain attenuation. This rain attenuation is used to predict noise interference from rain so that it can be overcome in rainy conditions. Statistical data from rain attenuation was modeled and generated numerically using ARMA which was modified to ARIMA so that observations from non-stationary to stationary. The ARIMA model value in this research is ARIMA (6,1,6)
Aplikasi Remote Sensing Untuk Analisis Geohidrologi Pada Area Sekitar Situs Tambang Intan Cempaka: Remote Sensing Application for Geohydrological Analysis in the Area Around the Cempaka Intan Mine Site
Get PDFCempaka Diamond Panning is a location for traditionally processed diamond and gold panning located in Cempaka sub-district, Banjarbaru city, South Kalimantan. Mining activities cannot be separated from matters relating to the management of natural resources, which apart from providing benefits, there are also impacts or losses from these activities, especially for the environment. The diamond mine in Cempaka is included in the critical category which has the potential to flood when there is high intensity rain. Therefore, it is necessary to carry out geohydrological analysis using remote sensing. The method used is overlay and weighting by weighting spatial and non-spatial parameters in an area of 3189 Ha. From the results of the analysis, it is known that around 3057.61 Ha of the Cempaka region of interest (ROI) area is included in the flood-prone area and 75.88 Ha of the Cempaka region of interest (ROI) area is a slightly vulnerable area with information about three affected villages, namely Sungai Tiung, Bangkal and Cempaka
Pengaruh Sistem Drainase Berwawasan Lingkungan terhadap Debit Limpasan pada Daerah Penyangga Kota Mataram : The Effect of an Environmentally Drainage System on Runoff Discharge in the Buffer Area of Mataram City
Get PDFMataram as the capital of West Nusa Tenggara Province has attracted people to live in it. The small city of Mataram makes the surrounding area a buffer area for rapid development. This condition can be seen from the increase in housing around Mataram City. This increase in housing area causes a reduction in water catchment areas. So during the rainy season there is an increase in runoff. The aim of the research is to determine the effect of an environmentally friendly drainage system on the amount of runoff discharge. The data required is land use data, rainfall, location maps and soil data. Rainfall data is used for Intensity Duration Frequency (IDF) analysis. IDF curves and land use data are used for runoff discharge analysis. Soil data is used to determine permeability which is used to determine of the discharge of infiltration well. Next, analyze the effectiveness of infiltration wells as an environmentally friendly drainage system. The results of the research show that there has been an increase in residential area over the last 10 years by 58% in Labuapi District, the southern part of Mataram City, 25% in Lingsar District and 29% in Gunungsari District, which is in the northern part of Mataram City. Changes in land use resulted in an increase in runoff discharge of 21% in Labuapi District, 8% in Lingsar District and 15% in Gunungsari District. An infiltration well with a diameter of 1 m and a depth of 1 m can absorb 1.13 m3 of water in the southern part and 1.21 m3 in the northern part of Mataram City. If every 100 m2 of residential area there is one infiltration well, then the effectiveness of the infiltration well in reducing flood runoff is 17.71% in Labuapi District, 15.61% in Lingsar District and 23.35% in Gunungsari District
Karakteristik Sampah Makroplastik di Pantai Wisata Lamaru Kota Balikpapan: Characteristics of Macroplastic at Lamaru Tourism Beach Balikpapan City
Get PDFMarine debris is one of the environmental problems in Indonesia's coastal and marine areas, especially macroplastics. One of the coastal areas with macroplastic problems is the tourist beach, which may adversely affect the coastal ecosystem, biota, and reduce the quality of the coastal environment. The purpose of this study was to identify the type and composition, calculate the total weight, and determine the difference in macroplastic density in two different periods. This study was conducted in March and August 2022 at Lamaru tourism beach, Balikpapan City, East Kalimantan. Transect lines and sampling at the research site were determined by following guidelines from the Ministry of Environment and Forestry of the Republic of Indonesia. Sampling was carried out in transect areas with a length of 100 metres parallel to the shoreline and following the width of the beach ridge. All data collected were analysed using Microsoft Office Excel and SPSS software. It was found that the types and composition of macroplastic at Lamaru tourism beach were 12 types such as bottle caps, spoons, food and beverage packaging, plastic bags, toys, cigarette butts, plastic basins, net bags, tarpaulins, rope, raffia, and other plastic materials with a total of 142 items. The total weight of macroplastic waste in period I was 5.6792 gr/m2 and in period II was 4.1874 gr/m2. There was no significant effect (p>0.05) between different periods on the amount, weight and density of microplastics at Lamaru Tourism Beach, Balikpapan City. The dominant source of macroplastic at Lamaru beach comes from human activities on land.
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Hubungan Perbedaan Beban Trauma Dengan Gambaran Histopatologi Edema Sel Otak Tikus Pasca Cedera Otak Traumatik: The Relationship between Trauma Load Differences and Histopathological Description of Rat Brain Cell Edema Post Traumatic Brain Injury
Get PDFTraumatic brain injury is a condition of the head structure that is impacted or traumatized, causing disruption of brain function. This condition is one of the types of injuries that have the most severe effects on disability and death. Globally, 60 million people suffer from traumatic brain injury each year, with the most common complication being intracranial hemorrhage which increases the risk of death and disability. The incidence of traumatic brain injury is most common in the age group of children (0 - 4 years), adolescents and young adults (15-24 years) and the elderly (> 65 years). Where the most common causes are falls and vehicle accidents. This study aims to determine the histopathological description of edema in rat brain cells after traumatic brain injury and to analyze the relationship between differences in trauma burden and histopathological features of brain cell edema in rats after traumatic brain injury. This research is an experimental conducted by giving treatment to the object under study and then observing it. Sampling in this research will use purposive sampling. Where the researcher has determined the criteria of the sample to be used in the study so that it can represent the population. Based on the research conducted, it was found that there was a relationship between differences in trauma load and the percentage of brain cell edema in rats after experiencing traumatic brain injury. Where the greater the load given, the wider the surface of the brain that is experiencing edema. The results showed a significant edema appearance compared to the histopathological appearance of rat brain cells in normal samples. In addition, it was found that there was an increase in the percentage of areas with edema with a greater trauma load p=0.8156
Uji Kombinasi Pupuk Anorganik Dan Pupuk Bio-Organik P Terhadap Ketersediaan P Dalam Tanah, Serapan P Tanaman, Dan Populasi Bakteri Pelarut Fosfat Pada Tanaman Kedelai (Glycine Max L. Merrill): Combination Test of Inorganic Fertilizer and Bio-Organic Fertilizer on P Availability in Soil, Plant P Absorption, and Population of Phosphate Solvent Bacteria in Soybean Plants (Glycine Max L. Merrill).
Get PDFThe application of bio-organic P fertilizer alongside inorganic fertilizers plays a crucial role in increasing available phosphorus (P) for plants while also aiming to reduce and optimize the use of inorganic fertilizers. This combination is expected to enhance crop yields, balance nutrient availability, and improve soil structure. The objective of this research was to investigate the impact of the combination of inorganic and bio-organic P fertilizers on soil P availability, P uptake in soybean plants, and the population of Phosphate-Solubilizing Bacteria (PSB) during the vegetative phase. The research utilized an experimental approach with four treatments. Each treatment involved five randomly selected samples, resulting in a total of 20 experimental units. The study was conducted from March to July 2019 in paddy fields in Semoyang Village, Praya Timur Subdistrict, Central Lombok Regency. The treatments used were as follows: P1 (50% of the recommended inorganic fertilizer + 10 g of bio-organic P fertilizer per plant), P2 (75% of the recommended inorganic fertilizer + 10 g of bio-organic P fertilizer per plant), P3 (100% of the recommended inorganic fertilizer), and the control group (without any treatment). The parameters analyzed in this study were the available P content in the soil, soil pH, dry weight of biomass, P uptake in plants, and the population of Phosphate-Solubilizing Bacteria. The results demonstrated that the treatments involving the combination of inorganic and bio-organic P fertilizers showed improvements in all tested parameters compared to using only inorganic fertilizers. The soil pH ranged from 6.56 to 6.64, available soil P ranged from 13.2 to 17.33 ppm, dry weight of biomass ranged from 8.2 to 11.01 grams, P uptake in plants ranged from 10.69 to 16.76 mg per plant, and the population of PSB ranged from 1.14×106 cfu/g to 4.56×107 cfu/g.
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Analisis Arahan Penggunaan Lahan berdasarkan Kelas Kemampuan Lahan di Daerah Aliran Sungai Kelep Lombok: Analysis of Land Use Direction based on Land Capability Class in the Kelep Watershed, Lombok
Get PDFConversion of forest land into agricultural land is a serious concern in the Kelep watershed. Agricultural methods applied without proper application of soil preservation and agrotechnology have resulted in significant erosion and reduced land productivity. Efforts to manage the Kelep watershed must be carried out by combining the interests of soil and water conservation with increase in agricultural production. The first step is to evaluate the capability of the land in this area. The aim of this study is to formulate a direction for land use for sustainable corn-based agriculture according to its capability class in the Kelep watershed. The results showed that the Kelep watershed was dominated by land with class IV 5,335.3 ha (48.02%) and VI 3,493.04 ha (30.95%) and III 1,813.71 ha (16. 32%) with the inhibiting factors for all land capability classes being the sensitivity of soil erosion (low-medium-rather high), slopes (wavy-wavy-slightly steep), and erosion damage (medium-rather heavy and heavy). Land with ability classes II, III and IV, can be utilized for the cultivation of Corn Plants (Zea Mays), accompanied by the application of agrotechnology and proper soil and water conservation so that it is sustainable, while land in class VI is not suitable for Corn cultivation, preferably for vegetation. permanent or forest in combination with the development of understorey plants with agroforestry patterns
Distribusi Kadar Air Tanah Dengan Irigasi Curah Pada Budidaya Tanaman Stevia (Stevia rebaudiana B.): Distribution of Soil Water Content under Sprinkler Irrigation in Stevia (Stevia rebaudiana B.) Cultivation
Get PDFSprinkler irrigation emulates rainfall patterns to supply plant water, improving soil conditions and ensuring sustained field performance. This study investigated the impact of sprinkler irrigation on Stevia's Coefficient of Uniformity (CU), soil moisture level, and crop coefficient (Kc). The experiment was conducted in Karangploso Village, Malang Regency, 700 m above sea level. Stevia plants were cultivated using sprinkler irrigation, and their water requirements were assessed by analyzing changes in soil moisture after irrigation. The results showed that sprinkler irrigation significantly increased soil moisture content. At a depth of 0-20 cm, soil moisture increased by an average of 0.135 cm3/cm3 (water depth of 27 mm), while at depths of 20-40 cm and 40-60 cm, the increase was 0.121 cm3/cm3 (24 mm) and 0.065 cm3/cm3 (13 mm), respectively, with a total water depth of 64 mm for 0-60 cm soil depth of 70 mm irrigation event. The crop coefficient (Kc) of Stevia varied during its growth stage, starting from 0.55 in the first week and gradually increasing to 0.57 in the 6th week. The total water requirement for Stevia until harvest at 60 days reached 279.8 mm. This finding emphasize the importance of monitoring and adjusting irrigation practices to ensure optimal growth of Stevia. Sprinkler irrigation effectively increased soil moisture content and determined the appropriate water requirement and Kc value for Stevia cultivation
Pengaruh Karakteristik Aspal Modifikasi Getah Pinus Terhadap Peluruhan Campuran Aspal Porus: Effect of pine resin modified asphalt on the draindown of porous asphalt mixture
Get PDFA porous asphalt mixture is a type of pavement that allows water to drain through, thereby reducing the amount of surface runoff and improving road safety. To drain water quickly, porous asphalt is dominated by coarse aggregate so that the voids in the mixture become larger. Draindown, which is the loss of asphalt binder from the mixture, can cause blockages and reduce the ability of the pavement to drain rainwater. The use of modified asphalt is expected to increase the bonding between the asphalt and aggregate to withstand loading but meet draindown requirements. The pine resin used as an asphalt modifier in this study was 2%, 3%, 4%, and 5%, whereas the percentage of gumrosin was 4% by weight of the modified asphalt. Modified asphalt testing includes the penetration, softening point, ductility, and weight loss. The mixing process of the aggregate with modified asphalt was carried out at 160 °C with asphalt contents of 4.5%, 5%, and 5.5% by weight of the asphalt mixture. The results showed that the penetration value, ductility, and weight loss of the modified asphalt increased, while the softening point decreased with the addition of pine resin. In general, the physical properties of the modified asphalt have a significant effect on the draindown value. Referring to the draindown specifications of the porous asphalt mixture (0.3 %), this requirement is fulfilled in all modified asphalt compositions and asphalt contents used in this study