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agriTECH

agritech
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Published by Universitas Gadjah Mada

ISSN : 02160455 EISSN : 25273825 DOI : 10.22146/agritech

Core Subject : Agriculture,

Agriculture, Biological Sciences & Forestry

Agritech with registered number ISSN 0216-0455 (print) and ISSN 2527-3825 (online) is a scientific journal that publishes the results of research in the field of food and agricultural product technology, agricultural and bio-system engineering, and agroindustrial technology. This journal is published by Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta in colaboration with Indonesian Association of Food Technologies (PATPI).

Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)

Articles 15 Documents

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Search results for , issue "Vol 32, No 2 (2012)" : 15 Documents clear

Pengembangan Metode Deteksi Minyak Kedelai dalam Campuran Minyak Kelapa Murni dengan Spektroskopi Infra Merah dan Kemometrika Abdul Rohman; Yakoob B. Che Man
agriTECH Vol 32, No 2 (2012)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Fourier Transform Infrared (FTIR) spectroscopy combined with the chemometrics techniques of Discriminant Analysis (DA) as well as multivariate analysis of Partial Least Square (PLS) and Principal Component Regression (PCR) has been developed for analysis of soybean oil (SO) in virgin coconut oil (VCO). The spectral bands correlated with VCO, soybean oil (SO), and their blends were scanned, interpreted, and identifi ed. The combined wavenumber regions of 1200 – 1000 and 3025 – 2995 cm-1 were used during analysis either in classifi cation using DA or in quantifi cation using PLS and PCR. DA can be successfully used for the classifi cation of VCO and that added with SO with the accuracy level of 100 %. Furthermore, PLS using FTIR normal spectra was preferred to be used for the quantifi cation of SO in VCO over PCR and the spectral derivatives. The coeffi cient of determination (R2) value obtained for the relationship between actual and FTIR predicted value of SO is higher than 0.99 with acceptable errors, either in calibration or in validation models.ABSTRAKSpektroskopi Fourier Transform Infra Merah (FTIR) yang digabung dengan kemometrika analisis diskriminan serta analisis multivariat Partial Least Square (PLS) dan Principal Component Regression (PCR) telah digunakan untuk analisis adanya minyak kedelai dalam minyak kelapa murni (Virgin Coconut Oil, VCO). Spektra infra merah yang berhubungan dengan VCO, minyak kedelai, serta campuran keduanya direkam, diinterpretasi, dan diidentifi kasi. Kombinasi daerah bilangan gelombang 1200 – 1000 dan 3025 – 2995 cm-1 digunakan untuk tujuan ini. Analisis diskriminan menunjukkan bahwa VCO murni dapat dibedakan dengan VCO yang telah ditambah dengan minyak kedelai dengan tingkat akurasi 100 %. Sementara itu, model kalibrasi PLS menggunakan spektra normal lebih terpilih untuk kuantifi kasi minyak kedelai dalam VCO dibandingkan dengan PCR dan spektra turunannya. Nilai koefi sien determinasi (R2) yang diperoleh > 0,99 dengan tingkat kesalahan (baik kesalahan kalibrasi atau prediksi) yang dapat diterima.

Mekanisme dan Kinetika Quenching Oksigen Singlet dari Senyawa Fenolik Daun Cengkeh Terhadap Fotoksidasi yang Disensitasi oleh Eritrosin Edi Suryanto; Johnly A Rorong; Dewa Gede Katja
agriTECH Vol 32, No 2 (2012)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

The objectives of this research were to isolate phenolic compound of clove leaves and to study the mechanism and kinetic of singlet oxygen quenching. Clove leaves was extracted by steam distillation using water for 6 hours. Crude clove leaves oil was purifi ed by distillation under reduced pressure. Isolated fractions were determined its structure by infrared (IR), nuclear magnetic resonance (1H-NMR), and mass spectrometry (MS) techniques. The effects of 0, 500, 1000 and 1500 ppm isolated compound on the photooxidation of linoleic acid (0,03M) containing 15 ppm erythrosine in ethanol were studied by measuring peroxide value of the oil. The quenching mechanism and kinetics of eugenol were studied by the steady-state kinetic method. Samples of 0; 0,06 x 10-4; 0,12 x 10-4; 0,24 x 10-4 dan 0,48x 10-4 mM eugenol prepared in water contained 0; 17,05 x10-4; 34,10 x 10-4; 68,19 x 10-4 and 136,39 x 10-4 mM of erythrosine stored under fl uorescent light (4000 lux) at room temperature for 15 hours. The result indicated that eugenol content of clove oil, F1, F2, F3 and F4 were 49.68; 54.32; 87.16 and 73.65%, respectively. The structure of F3 was identifi ed by IR spectrometry which shows strong absorption at 3448 cm-1 indicating hydroxyl group from the phenolic compound and the 1H NMR spectra showed that the number of proton ring was 3 hydrogen while the mass spectrometry showed the molecular ion peak at m/e = 164 as base peak and the absence of peak at (M-41)+ as the indicator of eugenol. The result showed that eugenol had antiphotooxidation activity on erythrosine sensitized photooxidation of oil. The mechanism of singlet oxygen quenching on erythrosine photodegradation showed that eugenol only quenched singlet oxygen. The total quenching rate constant of eugenol was 4,42 x 108/M/s.ABSTRAKPenelitian ini bertujuan untuk mengisolasi senyawa fenolik dalam daun cengkeh dan mempelajari mekanisme dan kinetika quenching oksigen singlet. Daun cengkeh diekstraksi dengan cara destilasi uap menggunakan air selama 6 jam. Minyak daun cengkeh kasar selanjutnya dimurnikan dengan destilasi pengurangan tekanan. Fraksi-fraksi yang terisolasi ditentukan strukturnya dengan metoda infra merah (IR), resonansi magnetik inti (1H NMR), dan spectrometer massa (MS). Efek 0, 500, 1000 dan 1500 ppm eugenol terhadap fotooksidasi asam linoleat (0,03M) yang mengandung 15 ppm eritrosin dalam etanol dipelajari dengan mengukur angka peroksida minyak. Mekanisme dan kinetika quenching oleh eugenol dipelajari dengan metode steady-state. Sampel 0; 0,06 x 10-4; 0,12 x 10-4; 0,24 x 10-4 dan 0,48x 10-4 mM eugenol dipersiapkan dalam pelarut air yang juga mengandung 0; 17,05 x10-4; 34,10 x 10-4; 68,19 x 10-4 dan 136,39 x 10-4 mM eritrosin yang disinari oleh cahaya fl uoresen (4000 lux) pada suhu kamar selama 15 jam. Hasil analisis kandungan eugenol dari minyak cengkeh, F1, F2, F3 dan F4 berturut-turut adalah 49,68; 54,32; 87,16 dan 73,65%. Kebenaran struktur F3 diidentifi kasi dengan spektrometer IR pada serapan kuat 3448 cm-1 yang menunjukkan adanya gugus hidroksil dari senyawa fenolik sedangkan pada 1H NMR menunjukkan jumlah proton pada cincin aromatic menjadi 3 atom H dan spektrometer massa menunjukkan m/e = 164 sebagai puncak tertinggi dan tidak muncul puncak (M-14)+ sebagai petunjuk adanya eugenol. Hasil ini menunjukkan bahwa eugenol memiliki aktivitas antifotooksidatif terhadap fotooksidasi asam linoleat yang disensitasi oleh eritrosin. Mekanisme quenching oksigen singlet terhadap fotodegrasi eritrosin oleh eugenol menunjukkan bahwa eugenol hanya menstabilkan oksigen singlet. Konstanta laju quenching oksigen singlet total oleh eugenol adalah 4,42 x 108/M/s.

Analisis Keberlanjutan Kawasan Usaha Perkebunan Kopi (KUPK) Rakyat di Desa Sidomulyo Kabupaten Jember Elida Novita; I B Suryaningrat; Idah Andriyani; Sukrisno Widyotomo
agriTECH Vol 32, No 2 (2012)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Sidomulyo village, Silo region is one of main small holder coffee producer at Jember district. Unpredictable world production and price can cause unsustainability of small holder coffee production. The research objective was to evaluate sustainability of small holder coffee plantation in Sidomulyo, Jember district. Based on purposive and random sampling survey, questionnaire and discussion with key persons were implemented in this research in collecting data. Dimension of ecology, social institutional, economic and technology were analyzed using Rap-Coffee program modified from Rapfi sh software. The result reveals that from four dimensions implemented in this research, the sustainability index was 59,5 % means that activity of small holder coffee plantation at Sidomulyo still have sustainability as a coffee production unit. This index could be increased through factors improvement of each dimension. The improvement of high sensitivity attributes in each dimension is strongly needed to develop better regulation to support the continuity of small holder plantation of coffee production unit at Sidomulyo.ABSTRAKDesa Sidomulyo, Kecamatan Silo merupakan salah satu sentra produksi kopi rakyat utama di Kabupaten Jember. Perkembangan produksi dan harga kopi dunia yang tidak pasti dapat berimplikasi terhadap keberlanjutan usaha pertanian kopi rakyat. Tujuan penelitian ini adalah untuk mengevaluasi keberlanjutan usaha kopi rakyat di Desa Sidomulyo, Kabupaten Jember. Berdasarkan purposive and random sampling survey, penelitian ini menggunakan kuesioner dan diskusi dengan pihak terkait dalam pengambilan data. Dimensi ekologi, sosial kelembagaan, ekonomi dan teknologi dianalisis dengan menggunakan program Rap-Coffee hasil modifi kasi dari program Rapfi sh. Berdasarkan simulasi program Rap-Coffee untuk keempat dimensi keberlanjutan, maka Indeks Keberlanjutan KUPK Desa Sidomulyo adalah 59,5 % yang berarti berlanjut. Indeks keberlanjutan ini dapat ditingkatkan melalui perbaikan terhadap faktor pengungkit (indikator sensitif). Oleh karena itu di dalam perencanaan kebijakan untuk pengembangan KUPK Desa Sidomulyo sebaiknya memprioritaskan pada peningkatan indikator yang memiliki sensitivitas tinggi di masing-masing dimensi.

Mitigasi Pelindian Nitrat pada Tanah Inceptisol melalui Pemanfaatan Bahan Nitrat Inhibitor Alami Joko Pramono; Djoko Prajitno; Tohari Tohari; Dja'far Shiddieq
agriTECH Vol 32, No 2 (2012)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

NO3 - leaching is one mechanism of N reduction in agricultural activity, which may contribute to environmental pollution. The purpose of this research is to investigate the use of natural products as nitrate inhibitors toward nitrate leaching in Inceptisol soil. In this study, three types of natural nitrate inhibitors (NI) derived from neem seed powder (NSP), mangrove bark powder (MBP), and coffee leaf powder (CLP) were tested combined with the three doses of NI, i.e. 20 %, 30 %, and 40 % of urea used were given. Moreover, a treatment without NI was used as a control. Material was supplied with urea nitrate inhibitor on the surface of the soil in the pot experiment that had been moistened with distilled water. Results showed that the nitrate inhibitors materials had different response to different nitrifi cation inhibition. Nitrate inhibitors material derived from neem seed powder (NSP) had the highest inhibition rate of 25.6 %, while mangrove bark powder (MBP) and coffee leaf powder (CLP) had the rate of 9.1 % and 11.8 %, respectively. NI ingredients naturally capable of inhibiting nitrifi cation through the inhibition of nitrifi er growth (ammonium oxidizing) which was temporary in the range of 7-14 days after NI materials application. Treatment of different materials and NI doses suppressed the leaching of nitrate from 56.6 % to 62.8 % during 14 day after application. Treatment using different materials had signifi cant effect compare to the control treatment without NI. Optimal dose of two selected NI materials showed the best performance of nitrifi cation inhibition (NSP and MBP), i.e. 18.3% (R2 = 0.69) and 21.67% (R2 = 0.69) from a given dose of urea, respectively, 7 day after application.ABSTRAKPelindian NO3- merupakan salah satu mekanisme kehilangan N dalam aktivitas pertanian, yang dapat berdampak terhadap pencemaran lingkungan. Tujuan dari penelitian adalah untuk mengetahui penggunaan bahan alami sebagai nitrat inhibitor terhadap pelindian nitrat pada tanah Inceptisol. Pada penelitian ini diuji tiga jenis bahan nitrat inhibitor (NI) alami yang berasal dari; serbuk biji Mimba (SBM), serbuk kulit kayu bakau (SKKB), dan serbuk daun kopi (SDK),yang dikombinasikan dengan tiga taraf dosis NI, yaitu: 20 %, 30 % dan 40 % dari urea yang diberikan, dan ditambah satu perlakuan kontrol tanpa NI. Bahan nitrat inhibitor diberikan bersama urea pada permukaan tanah dalam pot percobaan yang telah dibasahi dengan air suling. Hasil penelitian menunjukkan bahwa bahan NI yang berbeda memberikan respon terhadap penghambatan nitrifi kasi yang berbeda. Bahan NI yang berasal dari serbuk biji mimba memberikan tingkat penghambatan tertinggi sebesar (25,6 %), serbuk kulit kayu bakau sebesar (19,1 %), dan serbuk daun kopi sebesar 11,8 %. Bahan NI alami mampu menghambat nitrifi kasi melalui penghambatan pertumbuhan bakteri nitrifi kasi (pengoksida ammonium) yang bersifat sementara pada kisaran 7-14 hari setelah aplikasi. Perlakuan berbagai bahan dan dosis NI mampu menekan pelindian nitrat rata-rata pada kisaran antara 56,6 sampai 62,8 % dan berbeda sangat nyata terhadap perlakuan kontrol tanpa NI. Bahan NI yang mampu menurunkan rata-rata pelindian nitrat pada pengamatan 14 hari setelah aplikasi tertinggi adalah SBM sebesar 74,15 %. Dosis optimal dua bahan NI terpilih yang menunjukkan kinerja penghambatan nitrifi kasi terbaik (SBM dan SKKB) pada 7 hsa, masing-masing 18,30 % (R2 = 0,694) dan 21,67 % (R2=0.691) dari dosis urea yang diberikan.

Application of Neuro-Fuzzy Controller to Autonomous Agricultural Vehicle Operating on Unstructured Changing Terrain -Control Software Development- Lilik Sutiarso; Tomohiro Takigawa
agriTECH Vol 32, No 2 (2012)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

The control of an autonomous agricultural vehicle operating on unstructured changing terrain includes many objective diffi culties. One major diffi culty concerns the characteristics of the terrain condition that the vehicle should operate in. Problems ranged from the effects of varying terrain conditions on the autonomous vehicle sensors and traction performance through to the need to deal with the presence of unexpected situations. On unstructured changing terrain, many factors infl uence vehicle behavior such as terrain slope, lateral slippage, and so on. Therefore, it is necessary to develop a more suitable model for vehicle motion on these terrain conditions. In order to control the vehicle along a course on unstructured changing terrain, it was developed control software to enable more accurate control. The developed method to control the vehicle when operating on these conditions was Neuro-Fuzzy Controller. Result of the trained model could be described as follows; number of nodes was 193, number of fuzzy rules was 81, average testing error between simulation and ANFIS output was 0.76, while for experimental and ANFIS output was 1.61. It was concluded that the developed control system had a good accuracy to steer the vehicle.

Hidrolisis Minyak Kelapa oleh Enzim Lipase dari Kentos Kelapa Moh. Su'i
agriTECH Vol 32, No 2 (2012)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

This research learned the kind and amount of fatty acid that was produced from coconut oil hydrolyzed by lipase enzyme from coconut houstorium. Coconut oil was hydrolyzed by lipase enzyme from coconut houstorium for 30, 60, 90, and 120 minutes. The kind and amount of fatty acid obtained from hidrolization were measured. The result showed that hidrolization for 90 minutes produced the highest fatty acid 40,20 %. The highest fatty acid was lauric acid with 21,229 %, furthermore miristic acid 7,615 %, and capric acid 3,062 %.ABSTRAKPenelitian ini mempelajari jenis dan jumlah asam lemak yang dihasilkan dari hidrolisis minyak kelapa menggunakan enzim lipase dari kentos kelapa. Minyak kelapa dihidrolisis oleh enzim lipase kentos selama 30, 60, 9, dan 120 menit. Selanjutnya jenis asam lemak yang dihasilkan dan jumlahnya dianalisa. Hasil penelitian menunjukkan bahwa, hidrolisis selama 90 menit menghasilkan asam lemak paling tinggi yaitu sebesar 40,20 %. Jenis asam lemak yang paling banyak dihidrolisis adalah asam laurat sebesar 21,23 %, kemudian asam miristat 7,62 %, dan asam kaprat 3,06 % dari total asam lemak dalam minyak kelapa.

Optimasi Jumlah Inokulum dan Laju Aliran terhadap Persentase Penurunan Deterjen, Lipid, Bod Dan Cod pada Sistem Biofilter Kerikil Horizontal Nur Hidayat; Sri Kumalaningsih; Noor Hamdani; Susinggih Wijana
agriTECH Vol 32, No 2 (2012)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

The objective of this study was to determine the effect of fl ow rate of waste and the amount of inoculum to improve the quality of wastewater using a horizontal gravel biofi lter. The research was conducted with continuous horizontal gravel biofi lter. Waste materials were derived from the instant noodle soup which had diluted ten times and added with detergent 1.0 g/l. The experimental design used in this research was response surface methodology within two factors: the amount of inoculum and the fl ow rate of waste. Implementation of the biofi lter experiments conducted over 2 months. The results showed that the optimal value obtained were 6.83% inoculum and fl ow rate of 1.44 l/day which resulted in decreasing of BOD to 87.08 %, COD to 85.41%, LAS to 96.22 % and lipid to 81.88 %.ABSTRAKTujuan penelitian ini adalah untuk mengetahui pengaruh laju aliran limbah dan jumlah inokulum terhadap perbaikan kualitas limbah menggunakan biofi lter kerikil horizontal. Penelitian dilakukan dengan biofi lter kerikil horizontal kontinyu. Bahan limbah diperoleh dari kuah mie instan yang diencerkan sepuluh kali dan ditambah deterjen 1,0 g/l. Rancangan percobaan yang digunakan adalah response surface methodology dengan dua faktor yaitu jumlah inokulum dan laju aliran limbah. Pelaksanaan percobaan dengan biofi lter dilakukan selama 2 bulan. Hasil penelitian menunjukkan bahwa nilai optimal yang diperoleh adalah jumlah inokulum 6,83 % dengan laju aliran 1,44 l/hari yang menghasilkan penurunan BOD sebesar 87,08 %, COD 85,41 %, LAS 96,22 %, dan lipid 81,88 %.

Penerapan Analisis Dimensi dalam Rancang Bangun Mesin Pembelah Biji Kedelai (Glycine max L.) Sistem Gesek Putar Rofarsyam Rofarsyam; Bambang Purwantana; Nursigit Bintoro
agriTECH Vol 32, No 2 (2012)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

The aim of this research was to design a spin friction type of soybean slicing machine needed in the preparation of tempeh raw material. Dimensional analysis method was used to develop a mathematical relationship between the slicing capacity and its design variables. The prototype was tested using 260 mm diameter of hoppers equiped by number of blades with staggering variations of 51, 102, and 240 mm; a 300 mm diameter of hopper equiped by hopper’s blades with staggering of 118 mm; a 90 mm diamater of rotor with blades spacing of 71 mm; a 180 mm diameter of rotor with blades spacing of 141 mm; and a 75 mm diameter of rotor equiped by blades with spacing of 59 mm. The results showed that the slicing capacity (Q), were infl uenced by mass of soybean (WB), angular velocity (n), mass of water (WA), processing time (t), soybean density (ñ), spacing of rotor blades (SR), length of rotor blades (HR), spacing of hopper blades (SH), length of hopper blades (HH), and hopper diameter (DH). The relation was mathematically expressed by: The slicing capacity (Q/WB.n) were infl unced 620 % by parameters of (DH/SR) and 2 % by (WA/WB). The mathematical equation could be recommended as a reference for determining the geometry and the operational development of soybean slicing machine.ABSTRAKPenelitian ini bertujuan untuk merancangbangun mesin pembelah biji kedelai sistem gesek putar yang diperlukan dalam penyiapan bahan baku pembuatan tempe. Pendekatan analisis dimensi digunakan untuk mendapatkan persamaan matematis yang menghubungkan kapasitas kerja pembelahan dengan parameter-parameter yang berpengaruh. Hasil rancangbangun diuji melalui variasi hopper berdiameter 260 mm dengan jarak sudu masing-masing 51, 102, dan 204 mm; hopper berdiameter 300 mm dengan jarak sudu 118 mm; rotor berdiameter 90 mm dengan jarak sudu 71 mm, rotor berdiameter 180 mm dengan jarak sudu 141 mm dan rotor berdiameter 75 mm dengan jarak sudu 59 mm. Dari hasil pengujian hubungan antara kapasitas pembelahan (Q) terhadap berat kedelai (WB), kecepatan putar (n), berat air (WA), waktu proses (t), massa jenis kedelai (ñ), jarak sudu rotor (SR), panjang sudu rotor (HR), jarak sudu hoper (SH), panjang sudu hoper (HH), dan diameter hoper (DH) adalah sebagai berikut:Pengaruh parameter rancangbangun terhadap kapasitas kerja pembelahan (Q/WB.n) yang paling besar adalah (DH/SR) yaitu sebesar 620 %, yang paling kecil adalah (WA/WB) sebesar 2 %. Model matematis tersebut dapat direkomendasikan sebagai acuan dalam penentuan dimensi dan operasional pengembangan mesin pembelah biji kedelai sesuai kapasitas kerja yang dikehendaki.

Aktivitas Antioksidan Ekstrak Gambir yang Dipurifikasi Menggunakan Kromatografi Kolom Sephadex LH-20 Rusdin Rauf; Umar Santoso; Suparmo Suparmo
agriTECH Vol 32, No 2 (2012)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

Gambir was extracted with three types of solvents [aquadest:ethanol (1:1), ethanol;ethyl acetate (1:1), and ethyl acetate], followed by purifi cation using Sephadex LH-20 column chromatography. They were tested for antioxidant activity using DPPH and Ferrythiocyanate in linoleic system, compared with rutin and BHT. The results indicated that the purifi ed gambir extracts (PGE) gave the higher DPPH radical scavenging activity and inhibition of peroxide than rutin and BHT. The highest DPPH radical scavenging activity of PGE incubated for 25 minutes, at a concentration of 60 ppm, 80 ppm, and 100 ppm, were ethyl acetate fraction (27,58 % ± 1,87), ethyl acetate fraction (34,05 % ± 0,96), and etanol:ethyl acetat fraction (42,54 % ± 0,73), respectively. The fraction of ethanol:ethyl acetate displayed the highest inhibition of peroxide (45.11 % ± 2.17), incubated for 10 days.ABSTRAKTelah dilakukan ekstraksi terhadap gambir menggunakan tiga jenis pelarut [aquades:etanol (1:1), etanol:etil asetat (1:1), dan etil asetat], dilanjutkan dengan purifi kasi menggunakan kromatografi kolom Sephadex LH-20. Kemudian diuji aktivitas antioksidannya dengan metode DPPH dan Ferritiosianat dalam sistem linoleat, yang dibandingkan dengan rutin dan BHT. Hasilnya menunjukkan bahwa ekstrak gambir terpurifi kasi (EGP) memberikan aktivitas penangkapan radikal DPPH dan penghambatan peroksida yang lebih tinggi dibanding rutin dan BHT. Aktivitas penangkapan radikal DPPH tertinggi dari EGP yang diinkubasi pada menit ke-25, pada konsentrasi 60 ppm, 80 ppm, dan 100 ppm, berturut turut yaitu fraksi etil asetat (27,58 % ± 1,87), fraksi etil asetat (tidak berbeda nyata dengan fraksi etanol:etil asetat) (34,05 % ± 0,96), dan fraksi etanol:etil asetat (42,54 % ± 0,73). Fraksi etanol:etil asetat menunjukkan penghambatan peroksida tertinggi (45,11 % ± 2,17 %), yang diinkubasi selama 10 hari.

Prognosa Banjir Sub Das Konto Menggunakan Simodas Ruslan Wirosoedarmo; Alexander Tunggul Sutan Haji; Kuswadi Kuswadi
agriTECH Vol 32, No 2 (2012)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

The problem of fl ood and drought give negative impact to water system in the catchment area. It is related to forest condition in the upstream of watershed. One cause of flooding is the use of land that does not comply with the environmental carrying capacity making the area of repage is reduced. The purpose of this research is to predict the increase of flood hydrograph due to the change of land use sub-watershed. This study used spatial and attribute data. Spatial data included digital maps of topography, digital river network map, digital map of soil types, and digital maps land use. Map of land use consisted of the existing conditions of land use, while the land use itself was based on the 2010-2030 Spatial Plan of Malang Regency. Attribute data in the form of sub-daily rainfall data in Konto watershed year 2001-2010 were collected from the Pujon and Kedungrejo station. Data was analized using SIMODAS. Result indicated that changes of land use in sub-watershed Konto in Malang Regency for 20 years (2010-2030) increase the peak of fl ood from 1014,70 m3/ second to 1101,27 m3/ second or up to 8.53 %.ABSTRAKBanjir dan kekeringan merupakan dampak dari buruknya sistem tata air sebuah DAS. Hal tersebut berkaitan dengan kondisi hutan di bagian hulu DAS. Salah satu penyebab bencana banjir yaitu pemanfaatan lahan yang tidak sesuai dengan daya dukung lingkungan, sehingga kawasan resapan air berkurang. Tujuan penelitian adalah memprediksi peningkatan hidrograf banjir karena pengaruh perubahan alih fungsi lahan di Sub DAS Konto. Penelitian ini menggunakan data spasial dan data atribut. Data spasial antara lain peta digital topografi , peta digital jaringan sungai, peta digital jenis tanah, dan peta digital tata guna lahan. Peta tata guna lahan terdiri dari tataguna lahan kondisi eksisting dan tata guna lahan berdasarkan Rencana Tata Ruang Wilayah Kabupaten Malang tahun 2010-2030. Data atribut yaitu berupa data curah hujan harian wilayah Sub DAS Konto tahun 2001-2010 dari stasiun hujan Kedungrejo dan Pujon. Data dianalisis menggunakan metode analisa spasial dan disimulasi dengan SIMODAS. Hasil penelitian menunjukkan perubahan alih fungsi lahan selama 20 tahun (2010-2030) meningkatkan debit puncak banjir dari 1014,704 m3/detik menjadi 1101,27 m3/detik atau naik sebesar 8,53 %.

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name
Rachma Wikandari

Contact Email
rachma_wikandari@mail.ugm.ac.id

Phone
+6285712601130

Journal Mail Official
agritech@ugm.ac.id

Editorial Address
Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Rachma Wikandari

Contact Email rachma_wikandari@mail.ugm.ac.id

Phone +6285712601130

Journal Mail Official agritech@ugm.ac.id

Editorial Address Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia

Location Kab. sleman, Daerah istimewa yogyakarta INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Rachma Wikandari

Contact Email
rachma_wikandari@mail.ugm.ac.id

Phone
+6285712601130

Journal Mail Official
agritech@ugm.ac.id

Editorial Address
Faculty of Agricultural Technology, Universitas Gadjah Mada, Jl. Flora No. 1, Bulaksumur, Yogyakarta 55281, Indonesia

Location
Kab. sleman,

Daerah istimewa yogyakarta

INDONESIA