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Modeling of Forest and Land Fires Risk Level and Zone Using GIS in Kapuas Tengah Sub Basin, West Kalimantan Province Arianti, Iin; Sinukaban, Naik; Jaya, I Nengah Surati
JURNAL MANAJEMEN HUTAN TROPIKA Vol 13, No 2 (2007)
Publisher : Bogor Agricultural University

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Abstract

In the last 2 decades, forest and land fires in Indonesia have become a serious problem at national, regional, and even international levels. The smoke of the fires gave a negative impact on human activities and health and in turn coused economical and social loss. In addition, the haze pollution has become a serious problem internationally. This study was conducted to establish a risk model of forest and land fire in Kapuas tengah watershed, Kalimantan Barat Province. The model was based on scoring and weighting of bio-phisycal and human activity factors. Rangking method and Composite Mapping Analysis (CMA) were used to establish the model. The result showed that the accuracy of model by ranking method to determine the risk level and zone of forest and land fire was only 62,4% in Kapuas Tengah watersheed. Therefore, the model was not good enough to represent actual condition in the field. The accuracy of model using CMA method could be used to determine risk level and zone of forest and land fire. The CMA method showed that the Kapuas Tengah watershed consisted of 1,051,029.4 ha high risk, 379,307.0 ha of moderate and 195,010.7 ha of low vulnerable. The risk map can be used for early warning system to prevent forest and land fires.Keywords: forest and land fires, composite mapping analysis, rangking method, fire risk map
Dampak Perambahan Hutan Taman Nasional Lore Lindu Terhadap Fungsi Hidrologi Dan Beban Erosi (Studi Kasus Daerah Aliran Sungai Nopu Hulu, Sulawesi Tengah) Hidayat, Yayat; Sinukaban, Naik; Pawitan, Hidayat; Tarigan, Suria Darma
Jurnal Ilmu Pertanian Indonesia Vol 12, No 2 (2007): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

The research was proposed to identify rainforest conversion impact on hydrologic function and soil erosion, and its simulation using ANSWERS model. Surface runoff and soil erosion were measured in soil erosion plots and outlet of Nopu Upper Catchment. Rainforest conversion to agricultural lands were significantly increased soil erosions and surface runoffs. Soil erosion from maize and peanut rotation was higher 2061.8% than natural forest. It higher value also in intercroping young age cocoa, maize and cassava and maize were 2023.8% and 2012.3% respectively. While surface runoffs increased up to 761.7°/o on bare plot, 567.5% on medium age cocoa, 446.8°/o on young age cocoa, 415.1°/o on intercroping young age cacao, maize and cassavas, 405.9°/o on old cocoa, and 329.5% on intercroping young age cacao and cassavas. Crop and management factor (C factor) value is significantly corelated with outputs of ANSWERS model. Using daily daily C factors, the ANSWERS model performs well in predicting soil erosion which is showed by determination coefficent (Jr = 0.89), model efficiency (0.86), and average of percentage model deviations (24.1%). Whereas using USlE C factor, model accuracy lower which represented by model coefficient (0.40) and average of percentage model deviations (63.6%). Using daily C factors, ANSWERS model simulation indicates rainforest conversion into agricultural lands on Nopu Upper Catchment has caused soil and water loss 3190.5 ton/year and 115441.0 m3/year, respectively. Agroforestry system practices in agricultural lands which in line with reforestation in stream line and steep agricultural areas (slope> 40°/o) was effective to reduce soil erosions up to 77.6°/o.
Dynamics of Soil Quality, Erosion and Income of Farmer as Effect of Forest Conversion into Cocoa Landuse in Nopu Watershed, Central Sulawesi Monde, Anthon; Sinukaban, Naik; Murtilaksono, Kukuh; Pandjaitan, Nora H.
Forum Pasca Sarjana Vol 31, No 3 (2008): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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Abstract

Sustainable agriculture development requires a high quality and proper land management in order to promote high farmer’s income and to prevent natural  resources degradation. This research was conducted in Nopu sub-watershed, a sub sub Gumbasa watershed, Central Sulawesi Province. The erosion and surface run off were observed by placing erosion plots on various ages of cocoa land uses (monoculture and agroforestry), whiles the soil quality indicators were observed by analyzing the physical and chemical properties of soil samples, which were collected from various  ages of cocoa land use. The soil profile  permeability and soil surface coverage were directly observed on the field. Production and farmer’s income of various cocoa land use systems in Nopu watershed were collected by using questioners.  Sustainable management of cocoa (monoculture and agroforestry) was formulated by using various scenarios. Results of the study showed that 1) forest conversion into cocoa land use decreased soil quality degradation, tended to increase soil erosion and run off; 2) to establish a sustainable cocoa farming system in Nopu watershed, there should be practiced a proper and equilibrium fertilization, application of adequate soil and water conservation techniques such as mulching and construction of ditches closed (rorak) and  ridges (sengkedan).   Key words:  cocoa, erosion, farmer’s income, forest conversion, soil quality
Determining on Expectation of Reforestation Success Age at Mining Area, PT. INCO, Sorowako, South Sulawesi Puspaningsih, Nining; Murtilaksono, Kukuh; Sinukaban, Naik; Jaya, I Nengah Surati; Setiadi, Yadi
Forum Pasca Sarjana Vol 33, No 4 (2010): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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Abstract

Land rehabilitation of post-mining must be done with reforestation. Reforestation success in post-mining revegetation should to refer the characteristics of natural forests.  The success of the reforestation is expected to reach a climax forest ecosystem.  How much time is needed to achieve the desired condition (success reforestation), in this case described as the age of achievement expectations of reforestation success to reach a climax forest ecosystem (the basalt area).  The research is aimed to predict reforestation success age.  The study used regression analysis for determining the reforestation success age in mining area.  The measure used to determining the reforestation success age is basalt area (LBDS) of natural forests.  Mathematically it can be summarized to LBDS = f (age).  The study found the age of achievement expectations of reforestation success is 75 years.  Over the 75 years when the efforts to improve, protect and enhance forest functions are be done well, consistently, and even continued to rise, certainly reforestation success will be achieved, or even faster.   Key words: rehabilitation, mining area, reforestation, basalt area, reforestation success age
Analysis of Bekasi City Flood Reduction Using Watershed Management Kadri, Trihono; Sinukaban, Naik; Pawitan, Hidayat; Tarigan, Suria Darma
Forum Pasca Sarjana Vol 34, No 1 (2011): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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Abstract

One major river flowing through Bekasi City is Bekasi river. Total extent of the Bekasi watershed is about 39.045 ha, in 2002 with rainfall of 250 mm for 8 hours caused about 138 ha flooded in residents area for 2-3 days in Bekasi City, more extremely in 2005 with rainfall only 127 mm  for 6 hours caused about 164 ha flooded in residents area for 3 days.  This evidence showed that flood problem in Bekasi City is become worse, and seem to be more horrifying in the future. Therefore, the flood problem needs an extremely great attention.  The objectives of the research is (1) analysis watershed condition; (2) analysis of the causes of flood over Bekasi City from the perpective of hydrology and hydraulic; (3) plan of Bekasi watershed management to reduce flood risk in Bekasi City.  To obtain the purposes of this research, the method of analysis is devided into four main subjects: (1) analysis of watershed condition using SCS method; (2) hydrology analysis using hydrology modeling HEC-HMS; (3) river flow capacity using hydraulic modeling HEC-RAS and (4) plan of scenarios to reduce flood risk.  There are four scenarios to overcome the flood problems: (1) similarly with government plan 2010;(2) managing Bekasi watershed area with conservation tillage; (3) build water retarded structure entire of  watershed and;(4) combination of second and third scenarios.  The research results shown that river flow capacity only 462 m3/s is not enough to flow the discharges, otherwise the land use is change and increasing the run off in upstream.  Based on the problems, it is expected to overcome the flood problem by managing Bekasi watershed area with conservation tillage and build water retarded structure.  It will reduce 28.58% of the discharge run off in 2020.   Key words: flood, land use changing, watershed management
Analysis of Institution System on Planning and Strategy of Critical Land on Bila Watershed Management Nuddin, Andi; Sinukaban, Naik; Murtilaksono, Kukuh; Alikodra, Hadi S.
Jurnal Penyuluhan Vol 3, No 2 (2007): Jurnal Penyuluhan
Publisher : IPB

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Abstract

The rehabilitation program of critical land had been done since 1985 until 2001, but Bila watershed condition did not get better, even the width of critical land and erotion got more increase. Those were caused by some factors, involved: unaccruracy of technology, limited baudget, and unoptimal institution. Analysis of this study was focused on institution factor. Some of institution aspects that caused failure of rehabilitation of critical land Bila watershed, were is: role of institution sector, performance of management function, weakness on coordination, unrelevant of strategic program, and priority activity. Data collected was conducted by survey on some samples. Interpretative Structural Modelling and Analitycal Hierarchy Process were applied and the result shown that: (1) The main subject in critical land Bila watershed management were institution at regency level, which is Bappeda and Bapedalda, (2) unsuccess of rehabilitation of critical land Bila watershed was caused by planning weakness, (3) top-down policy, one of nine from main factors must be handled for effectiveness of coordination function, (4) to equalize vision and mission Bila watershed management cross territory was one of foor priority strategic frogram in critical land Bila watershed management, (5) and to increase knowledge and farmer skills were one of seven priority activity in critical land Bila watershed management.
Pemantauan Keberhasilan Reforestasi di Kawasan Pertambangan Melalui Model Indeks Tanah (Reforestation Achievement Monitoring at Mining Area through Soil Index Model) Puspaningsih, Nining; Murtilaksono, Kukuh; Sinukaban, Naik; Jaya, I Nengah Surati; Setiadi, Yadi
JURNAL MANAJEMEN HUTAN TROPIKA Vol 16, No 2 (2010)
Publisher : Bogor Agricultural University

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Abstract

The achievement of the reforestation is expected to reach a climax forest ecosystem. The objectives of this studywas to develop soil index model on monitoring of reforestation achievement. The study used a statistical approachto obtain soil index model to determine the achievement level of reforestation in mining area. The achievementindices for each variable were derived from the best regression model developed, while the weights of eachvariable were computed based on magnitude of regression coefficient for each indicator. The level of reforestationachievement index was initially developed by the use of 4 indicators, i.e. physical soil, biological soil, chemicalsoil, and litter index. Of those indicators, the study revealed that the heights weight for reforestation monitoringwas chemical soil, which is composed pH, cation exchange capacity (CEC), macro-micro nutrient, and basesaturation.
Watershed Modeling with ArcSWAT and SUFI2 In Cisadane Catchment Area: Calibration and Validation of River Flow Prediction Ridwansyah, Iwan; Pawitan, Hidayat; Sinukaban, Naik; Hidayat, Yayat
International Journal of Science and Engineering Vol 6, No 2 (2014)
Publisher : Chemical Engineering Diponegoro University

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Abstract

Increasing of natural resources utilization as a result of population growth and economic development has caused severe damage on the watershed. The impacts of natural disasters such as floods, landslides and droughts become more frequent. Cisadane Catchment Area is one of 108 priority watershed in Indonesia. SWAT is currently applied world wide and considered as a versatile model that can be used to integrate multiple environmental processes, which support more effective watershed management and the development of better informed policy decision. The objective of this study is to examine the applicability of SWAT model for modeling mountainous catchments, focusing on Cisadane catchment Area in west Java Province, Indonesia. The SWAT model simulation was done for the periods of 2005 – 2010 while it used landuse information in 2009. Methods of Sequential Uncertainty Fitting ver. 2 (SUFI2) and combine with manual calibration were used in this study to calibrate a rainfall-runoff. The Calibration is done on 2007 and the validation on 2009, the R2 and Nash Sutchliffe Efficiency (NSE) of the calibration were 0.71 and 0.72 respectively and the validation are 0.708 and 0.7 respectively. The monthly average of surface runoff and total water yield from the simulation were 27.7 mm and 2718.4 mm respectively. This study showed SWAT model can be a potential monitoring tool especially for watersheds in Cisadane Catchment Area or in the tropical regions. The model can be used for another purpose, especially in watershed management.
ANALISIS ALTERNATIF PENGGUNAAN LAHAN UNTUK MENJAMIN KETERSEDIAAN AIR DI DAS KONAWEHA PROVINSI SULAWESI TENGGARA S, La Baco; Sinukaban, Naik; Purwanto, Yanuar J; Sanim, Bunasor; Tarigan, Suria Darma
Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 8, No 2 (2011)
Publisher : Faculty of Agriculture, Sebelas Maret University

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Abstract

Fenomena of decreasing water supply and increasing water demand occurred at Konaweha watershed. Konaweha watershed shed is a priority watershed in Southeast Sulawesi Province due to its crucial function. Land use changes were suspected to be the cause of decreasing water supply. One effect of this condition was maximum discharge increase and minimum discharge decrease of Konaweha River resulted in water deficit. Research objectives were (1) to evaluate the effect of land use changes on hydrologic condition of Konaweha watershed; (2) to evaluate the water supply and water demand as well as supply and demand water balance at Konaweha watershed, and (3) to formulate land use alternatives and management policy of Konaweha watershed. This research had been conducted at Konaweha watershed for 10 months e.g. from June 2009 to March 2010. The average declining of forest width during 1991‐1999 was 1.25 percent/year, 2001‐2005 was 0.52 percent/year and 2006‐2011 was 0.90 percent/year. In the same time the availability of minimum discharge as a water supply was decrease. There was no deficit on annual water supply until 2050 but monthly distribution of hydrograph caused water deficit in September started from 2016. Proportion of maintenance cost for watershed function at Kendari Municipality was 35 percent while at the District of Konawe, South Konawe and Kolaka were 28 percent, 15 percent, and 22 percent respectively from total economic value of water at Konaweha watershed. Forest economic value including flora and fauna, carbon absorption, option value, bequest value and existence value was IDR 14,974,716/hectare. Five alternative of land use at Konaweha watershed were: (1) Scenario 1: 30 percent forest, 45 percent plantation, 6 percent mix garden and 1 percent bush; (2) Scenario 2: 35 percent forest, 45 percent plantation, 5 percent mix garden and 1 percent bush; (3) Scenario 3: 44 percent forest, 35 percent plantation, 5 percent mix garden and 1 percent bush; (4) Scenario 4: 34 percent forest, 45 percent plantation, 7 percent mix garden and 1 percent bush; and (5) Scenario 5: 40 percent forest, 35 percent plantation, 5 percent mix garden and 2 percent bush. Scenario 4 were not appropriate while scenario 1, 2, 3 and 5 were appropriate to applied in upper Konaweha watershed. Scenario 3 with a minimal of 44 percent of forest was the best land use alternative. Keywords: watershed, land use change, water supply, water demand
KAJIAN KEMAMPUAN LAHAN PADA USAHATANI LAHAN KERING BERBASIS TEMBAKAU DI SUB-DAS PROGO HULU Suyana, Jaka; Sinukaban, Naik; Sanim, Bunasor; Purwanto, M.Yanuar J
Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 7, No 1 (2010)
Publisher : Faculty of Agriculture, Sebelas Maret University

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Abstract

The recent and also the future problems for Indonesian concerning with agricultural environment resources are land degradation and water resources restrictiveness. Agricultural technique without awareness to concerning to soil and water conservation principles on steep and high rainfall area had caused severe erosion and land degradation at upland area of Progo Hulu sub-watershed. Land Degradation that promoted by erosion at Progo Hulu sub-watershed contributed negative effects at on-site and out-site area. The land capability analysis shows that tobacco-based farming system at Progo Hulu sub watershed dominated by class IV (3,624.93 ha; 49.00%), followed with class VI (2,488.82 ha; 33.64%), class III (697.99 ha; 9.43%), class V (450.73 ha; 6.09%), and class VII (136.06 ha; 1.84%). The main resistance factors are slope and erosion for class III; erosion, slope and surface rocks for class VI; and slope for class VII. Keywords: land capability, Progo Hulu Sub-watershed