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Results in Journal Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management): 287

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Irman Firmansyah, Etty Riani, Rahmat Kurnia
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management), Volume 2, pp 22-28; doi:10.19081/jpsl.2012.2.1.22

Abstract:
Jakarta Bay is important in coastal management for ecological and economical approach. Another case, it’s also as a river estuary area. Many rivers pass Jakarta Capital City, Bogor, Tangerang and Bekasi areas. The objective of this research were conducted to identify kind of source contamination, assimilation capacities of Jakarta Bay, important elements for contamination effect, and then to construct Sea Contamination Control model, for management policy instruction to prevent Jakarta Bay contamination. This research was operated from Agustus 2005 until April 2006. The analysis of this research used the system approach (dynamic system model). The contamination sources of this area were domestic waste, industrial disposal and waste of market. This contamination levels have an exceeded assimilation capacities: TDS is equal to 2 313 609.07 ton/month, PO4 is equal to 518.85 ton/month, SO4 is equal to 141 610.11 ton/month, MBAS is equal to 441.87 ton/month, KMnO4 is equal to 23 785.43 ton/month, BOD is equal to 16 369.05 ton/month, dan COD is equal to 52 983.15 ton/month. The interpretative structural modelling (ISM) indicated that there are five primary factors, namely law enforcement, good cooperation of stakeholders, good relation of area management, good compromise of need assessment, vision, target and mission to managing the environment. Keywords: assimilation capacities, contamination, dynamic system model, jakarta bay
Alan Purbawiyatna, Hariadi Kartodihardjo, Hadi Sukadi Alikodra, Lilik Budi Prasetyo
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management), Volume 2, pp 1-10; doi:10.19081/jpsl.2012.2.1.1

Abstract:
Community forest that privately owned at Kuningan Regency, West Java Province, have showed forest cover improvement at average of 5.86% during 2003 –2009. The main factor which contributes to this improvement was economic motivation of owners as a response to growing market of timber originated from community forest. This forest potentially serves as protected area outside state forest in land use plan of Kuningan district. Due to its characteristic as common-pool resources in the context of its protection function, privately owned community forest requires certain institutional arrangement to enable sustainable forest management resulting sustainable benefit for public. The aim of this study is to assess policy framework and its implementation designed to promote sustainable community forest development. The framework for implementation analysis was applied in this research with emphasis on the policy variable. The result showed that existing policy framework is weak to support sustainable management of community forest. They were characterized by unclear formulation of concepts in policy documents, inappropriate causal theory, unbalance financial resource allocation, very much detail and almost rigid in technical guidelines thereby hindering the achievement of policy objectives. Keywords: community forest, sustainable forest management, policy variable, policy analysis
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management), Volume 2, pp 29-36; doi:10.19081/jpsl.2012.2.1.29

Abstract:
Erosion constitute one of constraint for dryland farming in Indonesia. In dryland farming in transmigration sites, almost all factors led to the high rate of erosion: high intensity of rainfall in a short period, steep slope, opening of forest landcover for cultivation, and the absence of conservation efforts. This research was conducted to determine the soil conservation measures according to spatially calculated erosion. The calculation of the erosion rate was first carried out spatially, so that appropriate conservation could be recomended. The study was conducted in Rantau Pandan SP-3, Jambi Province. The amount of erosion was calculated using the method of Universal Soil Loss Equation (USLE) (Wischmeier & Smith, 1978). The results of the research showed that the magnitude of the maximum erosion in transmigration site of Rantau Pandan SP-3 ranged from 0.004 tonnes/ha/year to 496.97 tonnes/ha/year. The magnitude of this erosion is the maximum erosion in some land use types in the settlement and other part of land. Lands in Rantau Pandan SP-3 have an erosion hazard rate which were classified as mild to very severe. Tolerable erosion at Rantau Pandan SP-3 ranged from 29.7 to 35.8 tonnes/ha/year, taking into consideration the 300 years lifetime of soil. Spatially, erosion calculation can be done using several assumptions in accordance with the observations of field conditions. In each land use polygon can be assigned a maximum amount of erosion, which can then be used for the determination of soil conservation techniques. As erosion considered is the maximum erosion, protection against erosion can be guaranteed. Key words: Dryland farming, erosion hazard, landuse planning, spatial
Widiatmaka Widiatmaka, Fakultas Pertanian Departemen Ilmu Tanah Dan Sumberdaya Lahan, Setyardi Pratika Mulya, Marwan Hendrisman, Balitbangtan Balai Besar Sumberdaya Lahan Pertanian
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management), Volume 2, pp 46-55; doi:10.19081/jpsl.2012.2.1.46

Abstract:
Landuse planning according to biophysical and economical land suitability as well as basic allocation for transmigration should be done in order to improve the well-being of transmigrants. Suitability should be analyzed for the selection of commodities which are the most appropriate biophysically and profitable economically. The study was done in the settlements unit of Rantau Pandan SP-1, Jambi Province. The study was conducted to determine the suitability of each part of land for cultivation of food crops, vegetables and perennial crops and to see the biophysical suitability and economical feasibility. The goal is to recommend the most appropriate type of cultivation. This study integrate the Arc-View GIS and Automated Land Evaluation System (ALES) in the analysis of land suitability. The results showed that four agricultural commodities were observed showing land suitability class domination of S3 (marginally suitable) with the most dominant limiting factors were erosion and nutrient retention. The results of the analysis have been used for the determination of land use recommendations in the transmigration sites, presented spatially. Recommendations given based on the results of the analysis were not always in line with the land use recomended by government on dry land transmigration. Nonetheless, these results was suggested to be applied, either by considerations of conservation land and the consideration of economic benefit and farmers welfare. Key words: Land evaluation, transmigration, dry land farming, geographic information system
Rimun Wibowo, Sjafri Mangkuprawira, Asep Saefuddin, Sumarjo Gatot Irianto
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management), Volume 2, pp 94-100; doi:10.19081/jpsl.2012.2.2.94

Abstract:
To control quality of rainfed areas as well as improvement of farmers’ welfare is efforts already has been done by local government (Ponogoro) however it’sstill not success yet because it used to partial approach. Therefore, it is very important to research and develop model how to control quality of rainfed based on community empowerment with integrated (system) ap­proach.The location of research is in Ponorogo Districtwith 326 respondens, consist of 6experts, 20 linkage agencies staff and 300 farmers. Beside useAnalytical Hierarchy Process (AHP), Interpretative Structural Modelling (ISM), and System, this re­search also use univariat and bevariate analyze (Chi- Square and Structure Equation Model- SEM).Based on data and informa­tion that collected and analyzed, this research develop model that reflected the the real situation (fact), that can be simulated and validated. The model is established with system approach of population, local government services and ecology. The model vali­dated by absolute mean error (AME) and absolute variation error (AVE) that reflected variance between actual and value from model less than 10%, it show the model is a valid.This mean model able to simulate any changing of rainfed areas quality con­trol both in short or long term period.Other significant factors that related with rainfed areas quality control is farmers know­ledge (p-value= 0,030) and farmers behavior (p-value=0,040).The empowerment of farmers indicated by food and nutrition security (γ = 1), settlement and sanitation security (γ = 0.23), healthy security (γ = 0.01)and education security (γ = 0.24). The empowerment of farmers influenced by coping strategy (β=0.41), that reflected by how farmer survive in production, consump­tion and marketing of agriculture with respective of γ is0.59, 0.27, 037 and 0.42. In line with these statistic analysis AHP, ISM results and validation model, this research formulated empowerment policy focus on life skill development through farmer group. In the beginning process of life skill development focus on soft skill and then hard skill later on up to achieve sustainable self help group in managing their rainfed areas.Keywords: rainfed, quality, control, empowerment, model, system, coping strategy
Dede Dirgahayu, I Nengah Surati Jaya, Florentina Sri Hardiyanti Purwadhi, Muhammad Ardiansyah, Hermanu Triwidodo
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management), Volume 2, pp 85-93; doi:10.19081/jpsl.2012.2.2.85

Abstract:
In 2005 and 2009, BKP and WFP has provided food security conditions in Indonesia on Food Insecurity Map which were developed using food availability, food accessibility, food absorption and food vulnerability. There are 100 out of 265 districts in Indonesia or about 37,7%, which fall into the vulnerable to very vulnerable categories, where 11 districts were found in Java. The main objective of this research is to develope a spatial model of the rice production vulnerability (KPB) based on Remote Sensing and GIS technologies for estimating the food insecurity condition. Several criteria used to obtain food vulnerability information are percentage level of green vegetation (PV), rainfall anomaly (ACH), land degradation due to erosion (Deg), and paddy harvest failure due to drought and flood in paddy field (BK). Dynamic spatial information on the greenness level of land cover can be obtained from multitemporal EVI (Enhanced vegetation Index) of MODIS (Moderate Resolution Imaging Spectroradiometer) data. Spatial information of paddy harvest failure caused by drought and flood was estimated by using vegetation index, land surface temperature, rainfall and moisture parameters with advance image processing of multitemporal EVI MODIS data. The GIS technology were used to perform spatial modelling based on weighted overlay index (multicriteria analysis). The method for computing weight of factors in the vulnerability model was AHP (Analytical Hierarchy Process). The spatial model of production vulnerability (KPB) developed in this study is as follows: KPB = 0,102 PV + 0,179 Deg + 0,276 ACH + 0,443 BK. In this study, level of production vulnerability can be categorized into six classes, i.e.: (1) invulnerable; (2) very low vulnerability; (3) low vulnerability; (4) moderately vulnerable; (5) highly vulnerable; and (6) extremely vulnerable. The result of spatial modelling then was used to evaluate progress production vulnerability condition at several sub-districts in Indramayu Regency. According to the investigation results of WFP in 2005, this area fall into moderately vulnerable category. Only few sub-districts that fall into highly and extremely vulnerable during the period of May ~ August 2008, namely: Kandanghaur, Losarang, part of Lohbener, and Arahan.Keywords: remote sensing, GIS, food vulnerability, vegetation index, AHP
Zakiyyah Zakiyyah, Ervizal A.M. Zuhud, Sumardjo Sumardjo
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management), Volume 6, pp 71-76; doi:10.19081/jpsl.2016.6.1.71

Abstract:
Vegetable ferns (Diplazium esculentum (Retz) Sw) which grows in the forest directly utilized by community and often does not take into account the survival. Utilization of vegetables ferns should be in line with its preservation is to do conservation actions that are based on sustainable development in line with the Regulation of Law No. 5 In 1990 , concerning the conservation of natural resources. To support the law, community’s attitudes must be constituted in accordance with the concept of "tri-stimulus amar proconservation" which consists of the natural, benefits, and willingly stimulus. This research aims to determine how the community’s attitude toward conservation of vegetable fern. Data taken from survey results with a questionnaire of attitudes processed with aid MSI (Methods of Successive Interval) to see percentage numbers of community’s attitude. Based on the results of survey on 25 respondents, community’s attitudes indicate a positive attitude supporting the conservation vegetables fern but not entirely impact on the willingly stimulus. Community had no willingness to plant vegetable ferns because of the availability are abundant, does not have the land to grow and the lack of skills on how to plant vegetables ferns.
Sandi Nurdin, Widiatmaka Widiatmaka, Kursatul Munibah
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management), Volume 6, pp 1-12; doi:10.19081/jpsl.6.1.1

Abstract:
As one of the alternative location for paddy fields development, Kubu Raya Regencyhave a problem with lack of information on the land suitability and land availability. This study aimed to analyze the development potency of paddy field through land availability and land suitability analysis. The land availability was analyzed based on the land use and land cover interpreted from Landsat 8 image, a map of forest areas status, a map of spatial land use planning and a map of paddy field from the Ministry of Agriculture. Meanwhile, the evaluation ofland suitability wasexamined using the land system map (RePPProT) scale of 1: 250,000,which then complemented with the result of soil analysis. Analysis of land suitability wasconducted using the maximum limitation method.The research results show that suitable land for paddy field is 205,914 ha, which are classified into S3 with the limiting factor are poor drainage, peat maturity, peat depth and nutrients availability. Potential land (land suitability and land availability) for paddy fields development reached 62,176 ha. Recommended Development areas in the first priority is 1124 ha, the second priority is 35,334 ha and the third priority is 25,718 ha.
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management), Volume 6, pp 97-110; doi:10.19081/jpsl.2016.6.1.97

Abstract:
Coastal zone in Semarang City is facing climate change impact namely coastal inundation and sea level rise. These area are home to large and growing numbers of residents, visitors, large nursery area for coastal fauna resulting in many economic activities such as fishery, tourism and industrial development. However, the high concentrations of economic activities in the coastal zone contribute to higher potential of degradation of coastal (environmental) resources that drive these economics. This study aims to estimate the monetary value of coastal environment in two selected coastal wetlands such as beaches and estuary. The data collection has been done through non-site surveys and interviews with several respondents. Economic valuation approaches and techniques have been applied to quantify the value of coastal ecosystems including net factor income, hedonic price and contingent choice method. The highest economic contribution of coastal ecosystems was Fishery value accounts at Rp 23,340,352,861, followed by Amenity value at Rp 439,002,861, and Research value in a range Rp 238,868,000 and Rp 492,870,000. While, the lowest environmental value was estimated as Art value at Rp 214,045,150. For the two selected beaches and estuary, the Recreational/Tourism value was estimated at Rp 19,010,974,803, and Rp 1,011,087,200, respectively.Keywords: Economic valuation, coastal ecosystems, climate change impacts, Semarang coastal area.
Johanis R Pangala, Armansyah H Tambunan, Hariadi Kartodihardjo, Gustan Pari
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management), Volume 6, pp 61-70; doi:10.19081/jpsl.2016.6.1.61

Abstract:
This paper deals with the design and performance test of pyrolysis burning stoves that produce energy for cooking and biochar. The stove consists of two section chambers, namelycombustion chamber that produces activation heat for pyrolysis process and energy for cooking, andpyrolysis chamber that produces biochar and volatile matter (syngas and tar in gas form). Volatile matter product was introduced to the combustion chamber in addition to the biomass there and replaces biomass fuel gradually to produce energy for cooking and keeping the continuous pyrolysis process (autothermal). Methode used for performance test: direct observations/measurements and Water Boilling Test (WBT). Result of performance test: the autothermal process was going well until resulting a 100% biochar for most of the biomass used. Thermal efficiency of the stove was 11.3% (before pyrolysis) and 14.72% (after pyrolysis), excluding heat to produce biochar. Time needed to boil a 5 L water was 12 minutes before pyrolysis and 6 minutes after pyrolysis. Output power ranges from 9.60 kW to 23.16 kW. The maximum temperature reached 868 °C at the pan and 860oC in combustion chamber.Input biomass capacity depending on the type of feedstock ranging from 1200 - 3000 g/process, resulting in 507-900 g biochar/process, to give biochar ratio to raw materials from 23.0% to 44.8%. All maximum conditions occurs when volatilematters produced from pyrolysis process were burned, which showed that burning volatile matters is better than burning solid biomass directly.The amount of biochar produced by this stove was three times higher compared to anila stove, with less of smoke during the biochar production.
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