Jurnal Sains Teknologi dan Lingkungan (JSTL)
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Efektivitas Pengelolaan Hutan Kemasyarakatan Pada Berbagai Strata Luasan Lahan Di Kawasan Hutan Sesaot Lombok Barat: The Effectiveness of Community Forest Management in Various Strats of Land Area in the Sesaot Forest Area of West Lombok
Get PDFWhat is the exact area of community forestry (HKm) land that can be effectively managed by farmers? The objectives of the study were 1) to identify HKm land management practices by farmers based on vegetation density and income at various strata of land area, 2) to analyze the effectiveness of HKm land management in various strata of land area, 3) to analyze the factors that influence the effectiveness of land management in various strata. strata of land area The method used in this research is descriptive through a series of observations, interviews and Focus Group Discussions. The number of respondents interviewed was 42 people. The variables studied included environmental aspects such as plant density, economic aspects in the form of production values and effectiveness assessment using scoring techniques, with the decision criteria being very effective, effective, quite effective, less effective and ineffective. Based on the results of the study, it can be concluded that (1) plant density in various land strata in strata I (<0.25 ha), strata II (0.25-0.5), strata III (>0.5-1ha) and Strata III (>0.5-1ha). IV(> 1 ha) were 382, 387,389 and 378 plants/ha, respectively. Meanwhile, the income of each farmer is (Rp/ha/year): 46,494,744; 25,479,880; 39,704,174 and 31,358,023. From various land strata, the level of effectiveness of the management is categorized as effective for land strata I, III, and IV and quite effective for land strata II. The factor that influences the effectiveness of land management is land area, where there is a tendency that the smaller the land area, the more effective the management. Other factors are the application of agroforestry patterns, other land tenure, availability of labor and age of farmers. Suggestions put forward for land distribution policies should consider the area between 0.5 - 1 ha, because it has provided sufficient income for farmers
Willingness To Pay Sampah di Kota Berkembang: Studi Kasus Kota Meureudu Provinsi Aceh, Indonesia: Willingness To Pay For A Waste Management In A Developing Town: Case Study Of Meureudu City, Aceh Province, Indonesia
Get PDFWaste become one of the undermined issues faced in many countries, including Indonesia. Meureudu City in Aceh Province, Indonesia, is currently under development process to optimize its waste management. The waste issue in the city originated from the insufficient waste retribution cost. This study aims to analyze Willingness to Pay (WTP) in the case of waste generation. We use a survey method by conducting field observation with the community of Meureudu City as our sample, which amounted to 110 respondents. Our study showed that female housewife is the main gender in household waste management. Factors of the age group of 31-40 years (35%), bachelor and diploma education level (42%), high income, and family member > 4 persons (28%) are affecting the WTP. We also managed to gather information on the average waste of Meureudu City which amounted to 1,5 kg/person/day, exceeding the Ministerial Law of Environmental and Forestry (0,7 kg/person/day). Our study revealed the average WTP for waste management by the community of Mereudu City is IDR 9.218,18/household, which is higher compared to the regulated retribution cost. These additional costs will be beneficial to improve better waste management.
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Analisis Column Settling Air Permukaan yang Dikoagulasi dengan Biokoagulan Biji Pepaya: Analysis of Column Settling Surface of Water Coagulated with Biocoagulant Papaya Seed
Get PDFWater of river has high turbidity so it needs to be treated before being used as clean water. Common processing is coagulation, flocculation, sedimentation, and filtration. Type II sedimentation is the settling of flokulen particles, where there is an interparticle interaction so that the size increases and the rate of settling increases. This study aims to analyze the settling column in order to get isoremoval graphs of river water that have been coagulated using papaya seed biocoagulants. Isoremoval graph is useful for determining the value of surface loading rate (Vo) and time of detention (td) making it easier to design sedimentation tank. The study was conducted using a settling column with a diameter of 12.5 cm with a height of 150 cm. The operating conditions varied are sampling point depth of 25 cm, 50 cm, 75 cm, 100 cm and 125 cm with sampling time per port 10 minutes, 20 minutes, 30 minutes, 45 minutes and 60 minutes. The results showed the best turbidity of the settling column was 88.81% at a column settling depth of 25 cm with settling time of 60 minutes. The surface loading rate obtained to produce 85% deposition is 55 m3day-1m-2 with a detention time of 40 minutes
Estimasi Simpanan Karbon Tegakan Menggunakan Citra Sentinel-2A Pada Kawasan Mangrove Labuan Tereng Kabupaten Lombok Barat: Estimation of Standing Carbon Stock Using Sentinel-2A Imagery in the Labuan Tereng Mangrove Area West Lombok Regency
Get PDFThe primary worry in addressing climate change problems is the elevation in global temperatures resulting from the growing levels of CO2 emissions in the atmosphere. Mangrove ecosystems contribute to the "blue carbon" plan which is capable of storing carbon well, this research was conducted to assess carbon storage within the mangrove forest ecosystem by combining Sentinel-2A satellite imagery with on-site field measurements. The data analysis findings indicate the presence of six distinct mangrove varieties, namely R. mucronata, A. marina, R. apiculata, S. alba, E. agallocha, and C. decandra. The R. mucronata type is the type that dominates the mangrove area with an average carbon amount of 122.1 tonnes/ha. Correlation analysis shows a strong relationship between IKVm and mangrove forest carbon stocks, with a correlation coefficient value of 80%. In the regression model, the power model provides the best equation for estimating carbon stocks with a coefficient of determination value of 64.4% giving a model equation of y = 109.51x1.2381. Analysis of image carbon reserves obtained the lowest value, namely 0.02-10.46 tonnes/ha which was in the very rare vegetation density type and the highest carbon reserve value was 58.30-59.02 tonnes/ha in the very high density class
Pengaruh Sosialisasi, Kondisi Sosial Ekonomi, serta Dukungan Pemerintah Terhadap Adopsi Inovasi Pengelolaan Sampah Organik: The Effect of Socialization, Socio-Economic Conditions and Governemnt Support on The Adoptionof Organic Waste Innovation
Get PDFSuccessful of organic waste management is closely related to the adoption of innovation by the community. This study aims to see the effect of socio-economic conditions, socialization and government support to the adoption of organic waste management innovation. Research location was in Perak Utara Village, Pabean Cantikan District, Surabaya for 100 respondents. Independent variables are socialization programs, socio-economic conditions and government support while innovation adoption is the dependent variable. Data was obtained through a questionnaire. Data analysis used SPSS 25.00 for windows. Through linear regression analysis, the influence of independent variables consists of socialization program (X1), socio-economic conditions (X2) and government support (X3) on the dependent variable adoption of innovation (Y) are obtained by equation: Y' = -0.830 + 0.525X1 + 0.132X2 + 0.610 X2 + e. Without good social economic conditions (X1 = 0), no outreach program (X2 = 0) and without government support (X3 = 0) will have a negative effect on innovation adoption. Determination analysis shows the influence of independent variables to the dependent variable is 63.1% or socialization program, socio-economic conditions and government support are able to explain 63.1% of the innovation adoption, while remaining 36.9 % is influenced by other variables outside of this study.
 
Pengaruh Kadar Aspal Efektif dan Tebal Selimut Aspal Terhadap Proporsi Rongga pada Campuran Laston: Influence of Effective Asphalt Content and Film Thickness on Voids Proportion of Asphalt Concrete
Get PDFIn the mixing process between asphalt and aggregate, absorption of asphalt by the aggregate occurs through the pores of the aggregate. The volume of asphalt not absorbed by the aggregate can be defined as effective asphalt content which determines the percentage of airspaces in the compacted mix. The proportion of voids formed in the mixture contributes to the durability of the mixture against temperature and climate conditions. This study aims to examine the effect of effective asphalt content and the asphalt film thickness on the voids proportion in asphalt mixture. Based on the analysis, it can be concluded that the particle size distribution of the aggregate affects the total surface area of the aggregate in the mixture and the pores of the aggregate affect the effective percent of asphalt content. Aggregate with a small grain size produced a larger total surface area of aggregate. Meanwhile the use of aggregate with small pores produced a higher effective percent of asphalt content. The higher the effective asphalt content and the asphalt film thickness, the larger the voids in mineral aggregate and the voids filled with bitumen. In contrast, the voids in the mixture decreases with increase the effective asphalt content and the asphalt film thickness. In all the voids proportions analyzed, the effective asphalt content and the asphalt film thickness have a very significant effect
Sebaran Bakteri Coliform Sebagai Indikator Pencemaran Biologis Di Beberapa Sumber AirKecamatan Hu’u, Kabupaten Dompu
Get PDFColiform bacteria are a group of bacteria that originate from human and animal feces in large numbers, so they are often used as indicators of food and water quality. This study aims to determine the condition of the aquatic environment based on biological indicators such as the abundance of coliform bacteria in river water and wells in Hu'u sub-district, Dompu district. Data on coliform bacteria and water quality were sourced from PT STM based on the survey results of PT Intertek and PT Sucofindo in several rivers and wells in 2021. The results of data analysis show that most rivers have coliform bacteria density values exceeding the quality standards set by the Ministry of Environment and Ministry of Health. This is probably because many residents and cattle still dispose of their feces in the river
Efektivitas Pupuk Hayati Bactoplus dalam Meningkatkan Efisiensi Pemupukan NPK pada Tanaman Kentang (Solanum tuberosum L.) Varietas Chitra: Effectiveness of Bactoplus Biofertilizer in Increasing the Efficiency of NPK Fertilizer on Potato Plant (Solanum tuberosum L.) Chitra Variety
Get PDFThis study was undertaken to examine the effectiveness of Bactoplus biofertilizer in increasing the efficiency of NPK fertilization on potato of Chitra variety. The experiment used a two-factor factorial randomized block design, namely: doses of NPK fertilizer (N1= 650 kg ha-1 /100% of the recommendation; N2= 487.5 kg ha-1/75% of the recommendation; and N3= 325 kg ha-1/50% of the recommendation) and Bactoplus biofertilizer (H0 = without Bactoplus biofertilizer and H1 = with Bactoplus biofertilizer). The results showed that the biofertilizer Bactoplus was effective in increasing the efficiency of NPK fertilizer, particularly to plant height at 3 weeks after planting (MST) and number of leaves at 7 MST. At the same dosages of NPK fertilizer, application of biofertilizer increased the plant height at 3 MST and the number of leaves at 7 MST, The best growth was achieved when the plants was treated with 75% of NPK in combination with Bactoplus application. The effect of each factor showed that application of Bactoplus biofertilizer increased growth, yield and quality of potato tubers. In adition, the dose of NPK fertilizer affected the growth of potato plants but did not affect the yield and quality of potato tubers
Pengaruh Biochar Terhadap Mobilitas Merkuri (Hg) Pada Percobaan Pencucian (Leaching) Tertutup: Effect of Biochar on Mercury (Hg) Mobility in a Closed Leaching Experiment
Get PDFThis study aims to determine the effect of biochar application on Hg mobility in a closed leaching experiment using gold processing tailings contaminated soil. The factorial experiment was set up using a Completely Randomized Design (RBD) which tested three types of biochar (rice husk biochar, coconut shell, and corncob biochar) and three doses of biochar (0.10 tons ha-1 and 15 tons ha-1). The PVC column containing a mixture of polluted soil and dibiochar was washed four times with deionized water for a total of 1090 ml of watering. The results showed that the application of biochar can reduce the mobility of mercury (Hg) in small scale gold processing tailings polluted soils. The dissolved Hg concentration in the leachate decreased with increasing dose of biochar application. Leachate from corn cob biochar (15 tons ha-1) treatment showed the lowest Hg concentration of 0.0012 ppm but was not significantly different from leachate from the soil column that was applied coconut shell and rice husk biochar. The concentration of Hg in the leachate for all biochar treatments ranged from 0.0012 - 0.0062 ppm, significantly different from the leachate concentration of the soil column without biochar, which was 1.62 ppm. This provides an indication that biochar can reduce the leaching rate, so that the concentration of Hg is not much leached into the soil. Therefore, biochar can be used as a soil enhancer in remediation of mercury (Hg) polluted soil so that it can slow down the mobility of mercury (Hg) so that it has a small impact on the environment
Estimasi Emisi Gas Rumah Kaca (GRK) di TPA Benowo Menggunakan Model LandGem: Estimation of Green House Gas (GHG) Emissions at Benowo Landfill Using the LandGem Model
Get PDFGreenhouse gases (GHG) are one of the dangerous gases that cause global warming. Greenhouse gases include methane gas and carbon dioxide. In large quantities, this gas can cause damage to the atmosphere. Greenhouse gas emissions are dominated by waste management activities at landfills. Benowo Landfill is one of the Landfills that manages the waste of the residents of Surabaya City. The more waste that is piled up in the landfill, the more gas is produced. So it is necessary to estimate the occurrence of methane gas and carbon dioxide gas in landfills. LandGem is a model that is able to estimate greenhouse gases that will appear in landfills. In this research, greenhouse gas estimates were carried out at the Benowo landfill using 3 scenarios. This scenario is applied to determine the influence of weather (k value) on the landfill. The results showed that scenario 3 which uses a k value of 0.7 (wet area) has the highest estimate of methane and carbon dioxide compared to the other scenarios, namely 6.801 x 107 m3/year. This happens because the k value means that the landfill area has high rainfall and there is a bioreactor or leachate circulation system. This value is considered a good value for bacterial growth in landfills