Vol. 2 No. 3 (2017): Low Land

View Vol. 2 No. 3 (2017): Low Land

Published: 12/28/2017

Articles

Integration of GIS modeling with Fuzzy Logic method for land optimization of post mining on coal mine in South Kalimantan province: A case study of PT Wahana Baratama Mining
Mohamad Anis , Arifudin Idrus , Hendra Amijaya , Subagyo Subagyo
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Currently coal companies, especially in South Kalimantan, have not been yet or only slightly entered the post-mining stage, although part of the mining blocks have been totally exploited, so that the company should have been preparing for the development of other sectors (non-mining). It shows that optimization of coal resources from exploration, mining to post-mining land use is necessary to ensure sustainable mining and sustainable development in terms of meeting the conservation aspect. To meet all aspects of conservation, the achievement of optimization in a series of mining business activities is started from the potential optimization of the potential of the coal remain resources until the optimization of post-mining land use is absolutely required. This research has analyzed several alternative sectors outside mining, which will be selected for optimization of utilization or post-mining land use, including plantation, recreation, industry and conservation sectors. The analyzing process used several parameters to assess the selected sector including rainfall, slope and land use. Therefore, this study uses an approach of GIS-based methods (knowledge-driven), mainly fuzzy logic for post-mining land use planning. The selected mining area for this study belongs to PT. Wahana Baratama Mining company that has a Work Agreement for Coal Mining Exploitation. The result shows the suitability of plantation for the optimization of land use in all mining sites and also for conservation areas or protected forests.
Keywords: Optimization, Land use, Post-mining, Fuzzy logic.

Pages: 62-66

DOI: https://doi.org/10.22135/sje.2017.2.3.62-66

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Effect of Ground Vibration to Slope Stability, Case Study Landslide on The Mouth of Railway Tunnel, Gunung Gajah Village, Lahat District
Moamar Aprilian Ghadafi , Muhammad Taufik Toha , Dedi Setiabudidaya
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Slope stability around railway tunnel in Gunung Gajah Village, Lahat District needs to be analysed due to landslide which occurred on January, 23th 2016. That analysis needs to be done so that the railway transportation system can run safely. The purposes of this research are: to find out the factors that cause slope instability, to find out peak acceleration caused by railway traffic and earthquakes and its effects to the safety factor of slope, and determine stabilization method in order to prevent the occurrence of further landslide. The research activities include surveying, sampling, laboratory testing and analyzing slope stability using pseudo-static approach. Based on research result, the main factors that cause slope instability are morphology, structural geology, and ground vibration caused by earthquakes. Ground vibration are correlated to the slope instability. It shows that the higher of peak acceleration the lower of safety factor of slope. To prevent the occurrence of further landslide around research area, stabilization method should be applied in accordance with the conditions in that area such as building a retaining wall to increase safety factor of slope, building draining channels to reduce run off and performing shotcrete in the wall of landslide in order to avoid weathering.
Keywords: ground vibration, slope stability, stabilization method

Pages: 67-71

DOI: https://doi.org/10.22135/sje.2017.2.3.67-71

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Methane Gas Production Test From Forage Swamp with Ensilase Method As Biogas Plants
Erra Kartika Sriwijaya University Indonesia , Nuni Gofar , Sofia Sandi
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This study aims to test the production of methane gas from forage swamps by ensilase as biogas plants. Treatment levels consisted of 3 treatments P1 (100% Kumpai tembaga grass (Hymenachne acutigluma)), P2 (50% Kumpai tembaga grass (Hymenachne acutigluma) + 50% Kemon air (Neptunia oleracea lour)), P3 (100% Kemon air (Neptunia Oleracea lour)) and 5 replications. The result of the diversity analysis showed that silage swamp silage ensilase process significantly (p <0,05) to methane gas formation. The best composition was obtained from the treatment of P1 Kumpai tembaga grass (Hymenachne acutigluma) 100%.
Keywords: Production, Methane, Forage Swamps, Ensilase, Biogas Plants.

Pages: 72-75

DOI: https://doi.org/10.22135/sje.2017.2.3.72-75

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Changes to Some Physical Properties due to Conversion of Secondary Forest of Peat into Oil Palm Plantation
Heri Junedi Faculty of Agriculture, University of Jambi, 36361 Mendalo, Jambi Indonesia , M Edi Armanto Faculty of Agriculture, Sriwijaya University, 30662 Indralaya, SumSel Indonesia , Siti Masreah Bernas Faculty of Agriculture, Sriwijaya University, 30662 Indralaya, SumSel Indonesia , Momon Sodik Imanudin Faculty of Agriculture, Sriwijaya University, 30662 Indralaya, SumSel Indonesia
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The purpose of this study was to study how the physical properties of peat change due to the conversion of secondary forest into oil palm plantations.Â It was done by comparing the three conversion stages of the secondary forest into shrubs and oil palm plantations.Â The study was conducted in Ogan Komering Ilir District, South Sumatera Province, about 100 km south of Palembang, Indonesia from August to December 2016.Â Data collection was done randomly at all sites, each of five points for field sampling, observation of soil profile and measurement of hydraulic conductivity and water table depth.Â The samples were collected at a depth of 0-30 cm, both for undisturbed cores and bulk samples.Â The hydraulic conductivity was measured in the field using the auger holes method.Â The peat strength was determined by using the hand operated cone penetrometer.Â Data analysis was done descriptively and regression correlation test.Â The results showed that conversion of secondary forests into oil palm plantations has led to the decline in the quality of some of the physical properties of peat by decreasing total porosity, water table depth, hydraulic conductivity, organic matter content, moisture content and increasing the bulk density and peat strength.

Pages: 76-80

DOI: https://doi.org/10.22135/sje.2017.2.3.76-80

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Biodiversity of Echinodermata in Marsegu Island
Bijaya Latupono , Fredy Leiwakabessy , Dominggus Rumahlatu Pattimura University Indonesia
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Echinoderms are key species that govern the structure and balance of communities and influence the sustainability of other organisms in different types of ecosystems in sea water. This research aimed at examining the biodiversity of echinoderms, and environmental physical-chemical factors that affect the diversity of echinoderms in coastal waters of Marsegu Island. The data were collected with direct observation and all research variables were recorded. The data collection of echinodermata type was done on each plot in the middle intertidal zone and the lower intertidal zone. The results of this research found that the population of echinoderms in coastal water of Marsegu Island was composed of 4 classes, namely Ophiuroidea, Asteroidea, Echinoidea and Holothuriodea. The most common type found was Asteroidea which consisted of 3 families, 4 genera and 4 species. The results of observation showed there was a difference in echinoderm species found in the middle intertidal zone and the lower intertidal zone. The number of echinoderms species found in the middle intertidal zone was 8 species, while in the lower intertidal zone was 10 species, and there were some species that were not found in the middle intertidal zone, but they were found in the lower intertidal zone, namely Ophiopholis aculeafa, Linckia laevagata and Protoreaster nodusus. The Synapta maculata species was found in the lower intertidal zone, but it was not found in the midle intertidal zone. About 52% variation in echinoderms diversity can be explained by the regression equation model, while the remaining 48% was the influence of other factors that could not be explained by the regression equation model.

Pages: 81-87

DOI: https://doi.org/10.22135/sje.2017.2.3.81-87

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Analysis of Remoteness Effect of Indigenous Coconut (Cocosnucifera L.) Commodity on Farmers Profit at Tidal Lowland Area of Jambi Province-Indonesia
Ningsih R. , F. Sjarkowi , M. Sufri , D. Adriani , E. Wildayana
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The research objectives were to analyze pressure magnitude condition in forms of: 1) the excess supply of indigenous coconut commodity on farmers profit and 2) remoteness location of indigenous coconut plantation on farmerâ€™s profit. The method used in this research was field survey which was conducted from November 2015 to March 2016at two Districts of Tanjung Jabung Barat and Tanjung Jabung Timur of Jambi Province distributed at several Sub districts. Data was collected by using questionnaires for 100 respondents and was analyzed by using software of SPSS 20.The results showed the following facts: 1) indigenous coconut had characteristics of excess supply and mostly found at isolated plantation sites, 2) each characteristics of indigenous coconut commodity had negative effect on profit received by farmers. Therefore, local government policy is required to manage specific characteristics of indigenous coconut commodity at this area in form of proper policy strategy such as creating the added value of product through processing of coconut derivative product (product diversification) especially at famers level which located close to plantation sites.
Key words: Remoteness, indigenous coconut, profit, farmer, tidal lowland

Pages: 88-92

DOI: https://doi.org/10.22135/sje.2017.2.3.88-92

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Evaluation of Water Quality of Way Kuripanâ€™s River Using Water Quality Index Tool
Rina Febrina
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The aim of this study is to analyze the water quality of the Way Kuripan River based on the Water Quality Index (WQI) calculation method that is developed by the Malaysian Department of Environment (DOE). Water samples were taken from five sample points (SK01, SK02, SK03, SK04 and SK05) in January 2017. WQI was calculated on the basis of six parameters: dissolved oxygen (DO), biochemical oxygen demand (BOD), chemical oxygen demand (COD), pH, total suspended solid (TSS) and ammoniac-nitrogen (NH3-N). The calculation procedure consists of three stages. Firstly, identifying the equation of the sub-index (SI) based on the parameter value. Secondly, calculate the sub-index (SI) of each parameter. Last is the calculation of the water quality index. The results show that SK01 and SK04 have WQI values of 70.3 and 70.11. Those values show that water quality of the Way Kuripan river is class III so the water is slightly polluted. Sample points, SK02 (WQI = 55.8) and SK03 (WQI=53.8) are highly polluted. The lowest WQI of the Way Kuripan river is SK05 = 38.3, so it is classified as,Class V (highly polluted). In conclusion, this data confirms that the water quality in the Sungai Kuripan River has been polluted.
Keywords: Way Kuripanâ€™ s River, Water Quality Index (WQI), water quality parameter

Pages: 93-98

DOI: https://doi.org/10.22135/sje.2017.2.3.93-98

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Study of Bio-Coal Briquette as Solid Fuel for Aluminum Smelter
Diah K. Pratiwi , Riman Sipahutar , Amir Arifin
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Research on alternative energy today based on issues of global warming and greenhouse effects. The use of coal briquettes from low-calorie coal derived from mines in the province of South Sumatera originally destined for the food industry is less desirable because it emits black and smelly smoke, is difficult to turn on, and it is difficult to shut down quickly. So the thought arises to use this coal briquettes for the manufacturing industry and metal casting. In a previous study, the manufacture of mixed briquettes between low calorie coal (lignite) and biomass was more environmentally friendly due to low sulfur content. Therefore, in this study, a study was conducted to find the best biomass species to be mixed with lignite to bio-coal with the highest carbon content criteria and lowest sulfur content. The results showed that the mixture type between coconut shell and lignite reached the optimum condition with carbon content of 57.923% and the lowest sulfur was 0.259% in the mixture ratio of 9 : 1. The combustion temperature reaches 1500 K at furnace efficiency of 48%.
Keywords: bio-coal briquettes; lignite. coconut shell; enthalpy difference; carbon and sulfur content; flame temperature;

Pages: 99-101

DOI: https://doi.org/10.22135/sje.2017.2.3.99-101

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