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All Journal The Journal of Experimental Life Sciences (JELS) Jurnal Sumberdaya Alam dan Lingkungan Jurnal Keteknikan Pertanian Tropis dan Biosistem Jurnal Teknologi Pertanian Jurnal Sains dan Teknologi Pangan Jurnal Pertanian Terpadu JURNAL REKAYASA KIMIA & LINGKUNGAN
Ruslan Wirosoedarmo
Program Studi Teknik Lingkungan, Universitas Brawijaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Immunology & microbiology Mechanical Engineering Medicine & Pharmacology Neuroscience

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Analisa Tingkat Bahaya Erosi pada DAS Bondoyudo Lumajang dengan Menggunakan Metode Musle (In Press, JKPTB Vol 1 No 2) Findiana, Melisa Dwi Desi; Suharto, Bambang; Wirosoedarmo, Ruslan
Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol 1, No 2 (2013)
Publisher : Universitas Brawijaya

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Abstract

Tujuan dari penelitian ini adalah untuk mengetahui laju erosi pada DAS Bondoyudo Lumajang akibat penggunaan lahan dalam kondisi saat ini dan mengetahui penyebaran lahan kritis yang diakibatkan penggunaan lahan yang ada. USLE telah digunakan untuk memprediksi tingkat erosi tanah. Persamaan A=R.K.L.S.C.P, menampilkan lima faktor yang dianggap memainkan peranan penting untuk terjadinya erosi. Dalam MUSLE, faktor energi curah hujan diganti dengan limpasan. Hal ini meningkatkan prediksi hasil sedimen, karena merupakan fungsi dari kondisi kelembaban serta energi curah hujan. Penerapan MUSLE pada DAS membutuhkan pengolahan data yang canggih sesuai prosedur dan pengetahuan tentang teknologi GIS. Hasil dari penelitian didapatkan bahwa nilai Laju Erosi pada DAS Bondoyudo didominasi oleh erosi 0 – 15 ton/ha/tahun, yaitu tingkat bahaya erosi yang diijinkan. Indeks Erosivitas Hujan menggunakan ArcView mendapatkan (R) pada Stasiun Hujan Gucialit (9,315), Stasiun Hujan Senduro (1,914), Stasiun Hujan Sukodono (11,351) dengan Metode Thiessen. Penghitungan Erodibilitas Tanah (K) menunjukkan nilai 0,186 – 0,198 merupakan nilai terluas. Kata Kunci : erosi, konservasi, USLE, MUSLE, SIG, DEM, ArcView
Penentuan Kurva Retensi Air Dengan Menggunakan Fractal Padatan Pori (Pore Solid Fractal pada Alfisol tanpa olah tanah Wirosoedarmo, Ruslan
Jurnal Teknologi Pertanian Vol 5, No 1 (2004)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

The water retention in the soil is determined by distribution of soil particle measurement.  The growth of the plants are influenced by the soil characters such as the structure, strength of the soil it self, the soil resitance to water The retention of the water can be estimated exactly by using the distribution data of particle measurement. So far, the determination of the water retention curve used is by using pressure plate, which is set in any pF, so it needs longer time. Model of the water retention characteristic is based on fractal model of soil structure. Up to now, soil structure is difficult to be quantitative or on the other hand, it is stated in qualitative, but by using fractal theory of soil structure, it can be quantitative. Fractal approach to set the water retention characteristic is based on water structure named Pore Solid Fractal (PSF). The model shows water retention characteristic related on water structure parameter, which means not only use the distribution of soil solid measurement related with model scaling.Calculating results by using data of measurement class and cumulative mass are D fractal dimension value 2.555 ± 0.404. D value is defined as fractal mass dimension because it is based on the soil cumulative mass. D value attained in this model cannot be obtained model estimation explicitly can be drawn. Based on the estimation of D value, if it is used for water retention curve will be obtained that in D value = 2.71 there is compatibility between analysis result and the calculation in modeling. The limitation of  D value needs to be done in order to get exact value (appropriate with the original condition).  Keyword: water retention, pore solid fractal, alfisol, and  soil structure
The Influence of Soil Moisture and Rotation Speed of Rotary Tiller On The Characteristics of Tilt Soil Wirosoedarmo, Ruslan
Jurnal Teknologi Pertanian Vol 7, No 2 (2006)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

The aim of this research was to find out the best soil tilt as affected by the moisture content of the soil and rotation speed of rotary tiller. A randomized block design experiment was conducted at Balai Benih Induk Palawija, Bedali Lawang, Malang Regency, from October 2002 until January 2003, in three replicates.  The measurements were carried out on the tilt soil i.e. the tillage depth and mean weight diameter, the porosity and bulk density of soil, surface roughness of soil, penetration resistance of soil and shear strength of soil. The results indicated that both, the moisture content of soil as well as the rotation speed of the rotary tiller and their interactions significantly affects the above-mentioned parameters. The best tilt soil was found on the use of the rotary tiller at 90 rpm on the soil having moisture content plastic limit of 1.0 and the tillage was carried in two times.   Key words: Rotary tiller, moisture content, rotary speed, plastic limit
Implementation Fractal Theory to Determine Water Retention Curve on Entisol No Tillage Wirosoedarmo, Ruslan; Suharto, Bambang; Irawan, Cendra
Jurnal Teknologi Pertanian Vol 10, No 3 (2009)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

The analysis of soil characteristics are time consuming, cost highly, and the results are qualitative. Analysis of soil characteristics might be conducted through the fractal theory. Fractal description of soil based on the pore space and the distribution of particles is a useful way to make quantitative analysis of soil structure.D value is determined by a mathematical equation of the curve of water retention. The water retention curve is obtained from some values of D and then compared to the data from entisol soil analysis. The results are calculated based on the size and the mass class cumulative value obtained from fractal dimension (Dm) estimation of 1.87 ± 0.225.  The water retention curve models are obtained with a quite good value at D = 2.052.  There is a converse relationship between water content and water suction.  The greater water content, the less water suction, and vice versa.   This is shown in the regression linier model equation of y = 12744x2 - 8666x + 1239.6 with a determination coefficient R2 = 0.8252.  The value of water retention from the model is approximate the analytical data as shown in the linear regression from analysis of soil y = 12910x2 - 8751.9x + 1222 with determination coefficient R2 = 0.805.  The linear regression equation of the model is y = 12744x2 - 8666x + 1239.6 with a determination coefficient R2 = 0.8252.Key word: fractal theory, water retention, entisol soil
Technical Evaluation of Leaves Composting in UPT Kompos Universitas Brawijaya Muktiningsih, Satwika Desantina; Wirosoedarmo, Ruslan; Sutan haji, Alexander Tunggul; Anugroho, Fajri; Sulianto, Akhmad Adi; Lusiana, Novia
Jurnal Teknologi Pertanian Vol 17, No 3 (2016)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Besarnya kandungan sampah daun pada sampah yang dihasilkan di lingkungan UB memberikan peluang penanganan dengan pengomposan sebagai salah satu upaya daur ulang.   Tujuan penelitian ini adalah mengetahui teknis pengomposan sampah daun eksisting yang dilakukan di UPT Kompos UB dan menentukan karakteristik teknis yang perlu diperbaiki untuk meningkatkan proses pengomposan. Metode penelitian yang dilakukan berdasarkan perlakuan eksisting di UPT. Kompos UB yaitu tumpukan sampah daun umur 2 - 3 bulan yang telah dilembabkan dengan perbedaan bahan campuran meliputi tetes tebu 10 mL dan EM4 20 mL (P1) serta tetes tebu 2 L dan fastdec 1 L/ton tumpukan (P2). Karakteristik pengujian diamati pada selama proses pengomposan dan produk kompos yaitu reduksi berat, pH, kadar air, rasio C/N, kadar P, kadar K dan suhu. Proses pengomposan sampah organik yang dilakukan di UPT. Kompos UB terdiri dari penumpukan sampah daun hingga 2 – 3 bulan, pencacahan, fermentasi, pengayakan dan pengemasan kompos. Lama proses pengomposan yang diperlukan di UPT. Kompos UB adalah 2,5 – 4 bulan. Karakteristik awal pengomposan yang belum sesuai untuk mencapai kondisi optimum adalah kadar air yaitu 4,7 % dan perbandingan C/N sebesar 17,3, sedangkan karakteristik akhir pematangan kompos yang belum memenuhi standar SNI adalah K yaitu 0,0032 % dan rasio C/N sebesar 9,33.
Flood Prognosis of Keyang Sub-Sub Watershed Using SIMODAS for Strategic Environmental Assessment on Spatial Planning of Ponorogo District Haji, Alexander Tunggul Sutan; Wirosoedarmo, Ruslan; Syiama, Lissa Rullis
Jurnal Teknologi Pertanian Vol 13, No 1 (2012)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

The research aimed to apply SIMODAS in order to predict the flood hydrograph in Keyang sub-sub watershed used for Strategic Environmental Assessment was instrument used for urban planning at Ponorogo district. The method used is data analysis. The data requirement covers spatial and atribut data. The spatial data were digital map of topography, river network, soil types and land use. The land use digital map covers the map of existing condition and the map of spatial planning Ponorogo district. While, the atribute data were daily rainfall. The simulation by using SIMODAS aimed to compare the existed flood hydrograph curve and the change of flood hydrograph curve caused by the change of landuse. The expected benefit is that it can help predict the flood hydrograph, so the government of Ponorogo be more leverage to prevent floods. The result showed that the flood hydrograph of existing condition for the 10, 25, and 50 year repeated period describe the flood peak discharge 1672.94 m3/second, 2030.876 m3/second, and 2255.146 m3/second. While, the at time needed to reach the flood peak discharge were 101 minutes, 99 minutes, and 98 minutes. The change of land use can cause the flood peak discharge becomes 1727.457 m3/second, 2085.384 m3/second, and 2317.951 m3/second for the 10, 25, and 50 year repeated period. This also cause the flood peak time to become 99 minutes, 96 minutes, and 93 minutes. Keywords: flood hydrograph, SIMODAS, environmental assessment, ponorogo
Research on Planning Plant-Pattern and Water Gates Operational Pattern of Swamp Reclamation Network on Rimau Island in Kabupaten Musi Banyuasin of South Sumatera Wirosoedarmo, Ruslan; Apriadi, Usman
Jurnal Teknologi Pertanian Vol 3, No 1 (2002)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Research uses descriptive approach comprises to climate assessment, rainfall, landscape, topography, hydro topography, reclamation network technical data, and farming entrepreneur data in field. The data are analyzed to ensure that planting pattern and operational pattern of water gate is suited with farming demand. Result indicated that water management network in researched area is less than expected. Planting pattern is only for once planting season a year (Paddy-Bera), while the plan is for three times a year (Paddy-Paddy-Palawija). Maximum demand of water obtained by second period in month of October equals to 261,35 mm/period or 17,42 mm/day. Operational pattern of secondary and tertiary water gates of rice field during wet season is focused for retention, controlling drainage to waste excessive rainfall or during fertilization, rinsing and washing off toward toxic and acid materials, and rise-down tide irrigation. Drainage is demanded when water is inundated too deep or water quality gets worst. Palawija is planted at dry season, that is, after second cropping of rice is finished and extended to drainage. Analysis result indicates that planting pattern of researched area (Paddy-Bera) is predicted to Rp.1.495.000/ha/year and that planting-planned pattern (Paddy-Paddy-Palawija) is estimated to Rp. 7.730.750/ha/year.   Keywords: Planning Plant-Pattern, water management network, swamp reclamation
Pattern Interception of Coffee Plants in The Laboratory Scale Using the Rainfall Simulator with the Quite Heavy – Heavy Rain Intensity Naimah, Lilik Imron; Wirosoedarmo, Ruslan; Rahadi, J. Bambang
Jurnal Teknologi Pertanian Vol 9, No 3 (2008)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Hydrology is the science of learning and the provision of movement under and upper water on the earth surface.  There are many events in the hydrological cycles such as infiltration, percolation, run off, evaporation, transpiration, and interception. The interception is the event where rainfall felt on the vegetation of land surface is retained for a moment before evaporation into the atmosphere.  Interception is influenced some factors which are plant species, plant age, canopy shape, canopy with, leaf position. Therefore the existence of the canopy can inhibit rainfall to fall   on the land surface.Research on the interception is still limited. Generally, the value of interception is small, but it highly influences the occurrence of erosion.  This research was conducted to determine the magnitude of interception by simulation model.  The modeling used rainfall simulator as a tool. The objectives of this research were to know the relationship between the amount of rainfall and interception on coffee plants and to know the interception feature pattern of coffee plants using rainfall simulator.  The research used 3 heights of the plants, 3 rain conditions, and 5 densities of the plants (50%, 60%, 70%, 80% and 90%). The data obtained was analyzed by statistical analysis.  It was aimed to determine the relationship between variables assessed. Interception pattern of coffee plants based on density increased as the plant density increased.  The plant density of 90% had the highest interception value for each plant height. The magnitude of interception of coffee plants based on rainfall conditions which were quite heavy (intensity of 66,294 mm/hour), heavy-1 (intensity of 93,116 mm/hour) and heavy-2 (intensity of 133,35 mm/hour), showed the interception increased as the intensity increased.  The interception and precipitation showed positive correlation and logarithmic relationship.Keywords: hydrology, interception, rainfall simulator, simulation
The Effect of Water Supply System and the Thickness of Spon Buried on Water to Chinese Cabbage Growth (Brassica juncea) on Aqua Culture Method Wirosoedarmo, Ruslan; W., J. Bambang Rahadi; Ermayanti, Dita
Jurnal Teknologi Pertanian Vol 2, No 2 (2001)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

Aqua culture, as a part of hydroponics system, is cultivation on water as medium. The water has important role not only as nutrition source but also as root growth medium replaced soil function. One of the water supply system on it culture is sub irrigation, pumped regularly and nutrition solute on. Styrofoam perforated in a special distance, according to planting distance use for hold the plants. In every hole of Styrofoam, spon use to help roots absorb nutrition on irrigation water optimally.The research aimed to studying the effect of water supply system, the thickness of spon buried on water to Chinese cabbage growth and their interaction. Randomized block design employed with 3 replicates. Treatments carried out were water supply system (continue and flooding) and the thickness of spon buried on water (1cm, 2 cm and 3 cm).The result showed 1 cm thickness of spon buried on water significantly effect to Chinese cabbage height i.e. 8,795 cm, it is the highest result. The lowest result is 7,82 cm for 3 cm thickness of spon buried on water treatment. There is no interaction of two treatments to the amount of leaves, width of leaves and length of roots.Keywords: Chinese cabbage growth, water supply system, aqua culture 
Rate Infiltration Evaluation on Several Land Uses Using Infiltration Method of Horton at Sub DAS Coban Rondo Kecamatan Pujon Kabupaten Malang Wirosoedarmo, Ruslan; Suharto, Bambang; Hijriyati, Wulan Ruhunnatiqah
Jurnal Teknologi Pertanian Vol 10, No 2 (2009)
Publisher : Fakultas Teknologi Pertanian Universitas Brawijaya

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Abstract

The research was done on October until November 2008 in Sub DAS Coban Rondo Pujon Kabupaten Malang.  The aim of the research was to get information about infiltration rate at several land uses, to understand the relationship between the infiltration constant and the factors that influence infiltration process, and to know when infiltration method of Horton can be used to estimate infiltration.The measurement of infiltration in Sub DAS Coban Rondo used double ring infiltrometer with three treatments on eucalyptus land, corn land, and empty land. The removal sample soil was performed to know soil physical characteristic, and later to know the relationship between infiltration constant and soil physical characteristic. The result of this research indicated that at the beginning, infiltration value at eucalyptus land was 13.200 mm/minute, while at corn land was 15.800 mm/minute and 15.133 mm/minute for empty land.  The relationship between infiltration constant and bulk density was the high value of infiltration constant was followed by the low bulk density.  The high infiltration constant was followed by high space pore, water content, and organic matter.  Based on the calculation using Infiltration Method of Horton and infiltration in Sub DAS Coban Rondo with t-test there was no obvious difference at level of 99% with the result that Infiltration Method of Horton can be used to estimate infiltration process.         Keywords: infiltration, land use, infiltration method of Horton
Co-Authors Achmad Kurniawan Akhmad Adi Sulianto, Akhmad Adi Alexander Tunggul Sutanhaji Andi, Nur Syamsi Muhammad Ardika, Adriel Juan Azizah, Sari Aulia Bambang Rahadi Bambang Rahadi Widiatmono Bambang Suharto Bambang Suharto Cendra Irawan Devianto, Luhur Dita Ermayanti Erlita Meidya Pramesti Estin D. Kristanti Eunice, Samella Evi Kurniati Fajri Anugroho, Fajri Ghulam Arsyad Addibi Haji, Alexander Hasanah, Fatmawati Uswatun Hidayati, Erina Aprilia Ifa Fajarika J. Bambang Rahadi J. Bambang Rahadi W. Kiswadayani, Aliftya Vicky Laksmana, Saktia Indra Lilik Imron Naimah Liliya Dewi Susanawati Lissa Rullis Syiama Melisa Dwi Desi Findiana Mentari Kinasih Nasfhia, Siti Desiree Novia Lusiana Pranciska Trisnawati Handayani Budianto Riananda, Zavira Satwika Desantina Muktiningsih, Satwika Desantina Seto Sugianto Tunggul S. H, Alexander Tyas, Martina W Usman Apriadi Wulan Ruhunnatiqah Hijriyati Zulfikar, Fani