Articles

Intersepsi Curah Hujan di Hutan Hujan Tropis: Studi Kasus di Taman Nasional Lore Lindu Sulawesi Tengah Rauf, Abdul; Pawitan, Hidayat; June, Tania; Kusmana, Cecep
Jurnal Ilmu Pertanian Indonesia Vol 13, No 1 (2008): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

This filed research was conducted from Apr 2006 to .Juni 2007 at natural tropical rainforest of the Lore Lindu National Park, Central Sulawesi. The objectives were to study the effect of rainfall properties and vegetation characters on interception losses through mathematical model approach, to estimate the rainfall interception losses and to determine the dominant factors influencing them. Observation of vegetation characters in the study area indicated that the vertical and horizontal structure were in good conditions with high leaf area index (LAI 4.8-6.43 m2.m-2 ), ground cover (68.5-92.59%) and wide canopy at average 5.59 (12.05-9.83 m2 Total rainfall (P) on the first measuring phase (Apr 2006-March 2007) was 1502,6mm for 172 events. Dominant rainfall depth was 0.5-5mm for 78 events with cumulative rainfall at 182.2mm or 12.3%, of P. Dominant rainfall intensity was 1--10 mm per hour for 121 events with cumulative rainfall 140.2 mm or 9.3 % of P. The mathematical relationship between rainfall properties and vegetation characters with throughfall, stemflow and interception loss show that rainfall depth and LAI are two factors that strongly influences as expressed: interception loss: Ic= 0. 786+0.343* P+0.051 *LA I (R2=73,77) Application of this equation and Gash model to the second measurement phase (Apr 2007-Juni 2007) gave good agreement on interception estimate and sensitivity, and considering data requirement and calculation procedure this equation is applicable for interception estimation. The critical point of this result is the rainfall properties on Lore Lindu National Park that is very important to forest management, especially in controlling of flooding. Keywords : rainfall interception, tropical rain forest, vegetation characters
INTERSEPSI HUJAN DAN PENGARUHNYA TERHADAP PEMINDAHAN ENERGI DAN MASSA PADA HUTAN TROPIKA BASAH ” STUDI KASUS TAMAN NASIONAL LORE LINDU” Rauf, Abdul; Pawitan, H.; June, T.; Kusmana, C.; Gravenhorst, G.
AGROLAND Vol 15, No 3 (2008)
Publisher : AGROLAND

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Abstract

The field observation of this research was conducted from June 2005 – May 2007 in tropical rainforest at Lore Lindu National Park Central Sulawesi. The main objectives of this research  were to study  (i) the relationships between interception loss and rainfall properties and vegetation characters and to determine the dominant factors affected (ii) the effect of  rainfall interception on energy flux and mass transfer and  (iii) the dynamics of vertical energy flux under the forest and grass land. Rainfall interception was  36.34 % of gross rainfall in 200 events, Depth rainfall and LAI factors had strong effects on rainfall interception. The relationships could be expressed  as  Ic = 0.980+0.239P+0.035LAI  (R2 = 0.78).  The output of this equation was compared with Gash model and the observation value showed that deviation of the equation was  1 % and less than Gash model, so that equation gave as good result as Gash model gave. By considering the data requirements and calculation procedures it was concluded that this equation is applicable for interception prediction. Land use type had effects on  radiative and energy balance. Net radiation (Rn) in the forest was 10.66 MJ/m2/day and higher than  in the  grass land where incident global radiation was similar. Vertical latent heat flux in the forest was 9.53 MJ/m2/day or 89.40% Rn in rainy day and  8.41 MJ/m2/day or 74.56 % Rn in   dry day, on the other hand,  in the grass land, sensible heat flux was higher  than latent heat flux of all weather condition.  Direct effect of rainfall interception on energy flux  and mass transfer might be described that is needed latent heat 9.0 MJ/m2/rainy day to evaporate the rain intercepted of 3.69 mm/rainy day. Effect of rainfall interception had positive correlation with  latent heat flux and the negative correlation  with sensible heat flux.  
Rainfall Interception Effects of Energy and Mass Transfer in Tropical Raiforest: Case Study in Lore Lindu National Park, Central Sulawesi Rauf, Abdul; Pawitan, Hidayat; Kusmana, Cecep; June, Tania; Gravenhorst, G.
Forum Pasca Sarjana Vol 31, No 4 (2008): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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Abstract

The field observation of this research was conducted from June 2005 to May 2007 in tropical rainforest at Lore Lindu National Park, Central Sulawesi.  The main objectives of this research were to study (i) the relationships between interception loss and rainfall properties and vegetation characters and to determine the dominant factors affected, (ii) the effect of rainfall interception on energy flux and mass transfer, and (iii) the dynamics of vertical energy flux under the forest and grass land. Rainfall interception was 36.34% of gross rainfall in 200 events, Depth rainfall and LAI factors had strong effects on rainfall interception.  The relationships could be expressed as Ic = 0.980+0.239P+0.035LAI (R2 = 0.78).  The output of this equation was compared with Gash model and the observation value showed that deviation of the equation was 1% and less than Gash model, so that equation gave as good result as Gash model gave.  By considering the data requirements and calculation procedures it was concluded that this equation is applicable for interception prediction.  Land use type had effects on radiative and energy balance.  Net radiation (Rn) in the forest was 10.66 MJ/m2/day and higher than in the grass land where incident global radiation was similar.  Vertical latent heat flux in the forest was 9.53 MJ/m2/day or 89.40% Rn in rainy day and 8.41 MJ/m2/day or 74.56% Rn in dry day, on the other hand, in the grass land, sensible heat flux was higher than latent heat flux of all weather condition.  Direct effect of rainfall interception on energy flux and mass transfer it is needed latent heat about 9.0 MJ/m2/rainy day to evaporate the rain intercepted 3.69 mm/rainy day.  Effect of rainfall interception had positive correlation with  latent heat flux and the negative correlation  with sensible heat flux.   Key words: interception, energy, mass and tropical rainforest
PENENTUAN ZONASI PERIZINAN PERTAMBANGAN MINERAL NON LOGAM DAN BATUAN DI KABUPATEN BLORA BAGIAN SELATAN PROVINSI JAWA TENGAH Widodo, Dodi Bagus; Budiarto, Budiarto; Rauf, Abdul
Jurnal Teknologi Pertambangan Vol 1, No 1 (2015)
Publisher : Jurnal Teknologi Pertambangan

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Abstract

Kabupaten Blora (bagian selatan), Provinsi Jawa Tengah memiliki sumberdaya mineral bukan logam dan batuan cukup besar, sehingga perlu dilakukan zonasi perizinan pertambangan mineral bukan logam dan batuan untuk membantu pemerintah maupun investor dalam menanamkan modalnya di Kabupaten Blora.Sumberdaya yang diteliti pada penelitian ini adalah pasirbatu, batugamping, dan gypsum. Mineral Pasir Batu, Batugamping dan Gypsum yang berada di Kabupaten Blora berada pada Kecamatan Cepu, Kec Randublatung, Kec Kedungtuban, Kec Jati, Kec Kradenan. Dengan total sumberdaya :??Pasir Batu : 2.199.000 m???Batugamping : 99.960.000 m???Gypsum : 4.820 m?Pada Penentuan Zonasi Perizinan Pertambangan Mineral Pasir Batu, Batugamping dan Gypsum pada Kabupaten Blora dilakukan dengan cara pertampalan (overlay). Adapun sektor-sektor terkait yang dapat di lakukan dengan cara pertampalan (overlay) ini berjumlah 11 parameter yaitu Ketinggian lahan, Kemiringan lahan, Rawan Bencana, Ketebalan tanah penutup, Air Tanah, Sungai dan Bangunan, Mata Air dan Peresapan Air, Hutan dan Perkebunan, Pariwisata, Pemukiman, Penggunaan Lahan Pertanian.Kemudian akan dibahas potensi sumberdaya pasirbatu, batugamping, dan gypsum pada daerah mana saja di Kabupaten Blora bagian selatan. Selanjutnya akan dibahas pula penentuan secara umum mengenai peraturan ? peraturan dalam penambangan sumberdaya tersebut. Lebih jauh lagi akan dibahas mengenai teknik penambangan pada masing-masing sumberdaya dengan spessifik daerha masing ? masing.?Kata Kunci : Zonasi, mineral bukan logam dan batuan, Kabupaten Blora.
Perbaikan Sifat Tanah Kebun Kakao pada Berbagai Kemiringan Lahan dengan Menggunakan Teknik Biopori dan Mulsa Vertikal Maharany, Rina; Rauf, Abdul; Sabrina, T.
Jurnal Ilmu Pertanian KULTIVAR Vol 5, No 2 (2011)
Publisher : Jurnal Ilmu Pertanian KULTIVAR

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Abstract

Pengelolaan limbah tanaman kakao masih belum ditangani dengan tepat, salah satu upaya pengelolaan yang tepat dalam pengelolaan serasah kakao adalah dengan membenamkannya ke dalam tanah agar terjadi percepatan pelapukan (secara biopori dan mulsa vertikal) dan memberikan kontribusi terhadap perbaikan dan kesuburan sifat tanah. Tujuan penelitian ini adalah untuk mengevaluasi teknik yang paling tepat dilakukan dalam penempatan serasah kakao terhadap perbaikan sifat tanah di kebun kakao, dan untuk mengevaluasi pengaruh kemiringan lahan terhadap sifat tanah di perkebunan kakao, untuk mengevaluasi interaksi antara penempatan serasah kakao dan kemiringan lahan terhadap sifat tanah di perkebunan kakao. Metoda penelitian yang digunakan adalah Rancangan Petak Berjalur (Strip Plot Design) dengan 3 (kali) ulangan. Faktor pertama adalah kemiringan lahan yaitu lahan datar, lahan landai dan lahan miring. Faktor kedua adalah penempatan serasah kakao yaitu tanpa pemberian mulsa (kontrol), penempatan serasah secara biopori, dan penempatan serasah secara mulsa vertikal. Hasil penelitian menunjukkan bahwa perlakuan penempatan serasah kakao berpengaruh nyata terhadap perbaikan sifat tanah dikebun kakao terutama penempatan serasah kakao secara mulsa vertikal. Perlakuan kemiringan lahan berpengaruh nyata terhadap sifat tanah kebun kakao, yang lebih baik adalah pada kemiringan lahan datar. Interaksi antara perlakuan penempatan serasah kakao dan kemiringan lahan berpengaruh nyata terhadap perbaikan sifat fisik, sifat kimia, dan sifat biologi tanah di kebun kakao. Kata kunci: biopori, mulsa vertikal, sifat fisik, kimia, biologi tanah
Efek Pemberian Kompos Limbah Padat Pengolahan Minyak Nilam dan Pupuk Fosfat terhadap Tanaman Nilam (Pogostemon cablin Benth.) Banurea, Adei Johan M; Damanik, B. Sengli; Rauf, Abdul
Jurnal Ilmu Pertanian KULTIVAR Vol 4, No 2 (2010)
Publisher : Jurnal Ilmu Pertanian KULTIVAR

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Pengujian penggunaan kompos limbah padat pengolahan minyak nilam dan pupuk fosfat terhadap pertumbuhan dan produksi nilam (Pogostemon cablin Benth) di Kabupaten Pakpak Barat. Nilam ialah salah satu tanaman industri yang memiliki pelung dan potensi untuk dikembangkan sebagai komoditas unggulan daerah. Informasi pemupukan dan pemanfaatan limbah menghasilkan minyak nilam sampai saat ini masih sangat terbatas. Tujuan penelitian adalah untuk mengetahui dosis kompos limbah padat penyulingan minyak nilam dan pupuk fosfat yang tepat bagi pertumbuhan dan produksi nilam di Kabupaten Pakpak Barat. Penelitian ini dilaksanakan pada bulan Maret 2010 sampai Agustus 2010 di Desa Kaban Tengah, Kecamatan Sitellu Tali Urang Jehe, Kabupaten Pakpak Barat, Propinsi Sumatera Utara.  Metode penelitian yang digunakan adalah Rancangan Acak Kelompok (RAK) Faktorial dengan 2 faktor yaitu : Perlakuan taraf kompos limbah padat pengolahan minyak nilam 0 ton/ha, 10 ton/ha, 20 ton/ha, 30 ton/ha dan perlakuan taraf pupuk fosfat 0 kg/ha, 50 kg/ha, 100 kg/ha, 150 kg/ha, 200 kg/ha. Dari hasil penelitian menunjukkan bahwa bobot kering daun yang merupakan parameter produksi tanaman nilam terbaik dihasilkan oleh perlakuan 30 ton/ha kompos limbah padat pengolahan minyak nilam dan 50 kg/ha pupuk fosfat, tetapi tidak berbeda nyata dengan perlakuan 20 ton/ha kompos limbah padat pengolahan minyak nilam dan 10 kg/ha pupuk fosfat. Penggunaan kombinasi perlakuan meningkatkan produktivitas tanaman dan kadar patkouli alkohol. Kata kunci: Pogostemon sp, limbah, pemupukan, dan Kabupaten Pakpak Barat.
ANALISIS EFEKTIFITAS KINERJA KEUANGAN DINAS PENDAPATAN DAERAH (DISPENDA) KOTA MAKASSAR Rauf, Abdul
AKMEN Jurnal Ilmiah Vol 8 No 4 (2011): AKMEN Jurnal Ilmiah
Publisher : AKMEN Jurnal Ilmiah

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Abstract

Financial performance is a picture of financial condition in a given period either in relation to aspects of fund raising and distributing funds that are usually measured by indicators of capital adequacy, liquidity, and profitability. Profitability assessment aspect to determine the ability to create profits, which are certainly important for the owners. With good financial performance will ultimately affect both the internal and for external parties.
Morphology and physiology characteristic of some varities of rice under salinity stress Barus, Wan Arfiani; Rauf, Abdul; Damanik, B. Sengli; Rosmayati, .
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 3, No 1 (2013): Life Sciences
Publisher : Syiah Kuala University

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This experiment was aimed to evaluate yield potential and adaptability of some varieties of rice based on some morphological and physiological characters. This study was conducted at Paluh Merbau village, Percut Sei Tuan Sub-District, Deli Serdang District, North Sumatera, Indonesia on March 2012 till July 2012. This research was arranged in a randomized block design non factorial with three replications. Eight varieties used are Ciherang, IR 64, Lambur, Batanghari, Banyuasin, IR 42, Inpara 10 and Margasari. Salinity stress in rice leads to changes in both morphological and physiological characters of plants, where the response of each genotype varies depending on the nature of tolerance or sensitivity to salt stress. Observation of growth and production showed that genotif IR 42 had the best growth and the highest production as compared with other varieties
Pemetaan Potensi Karbon di Lahan Gambut Topogen Pada Berbagai Kecamatan di Kabupaten Humbang Hasundutan, Provinsi Sumatera Utara Sitanggang, Grandis Tua; Rahmawaty, Rahmawaty; Rauf, Abdul
Peronema Forestry Science Journal Vol 2, No 2 (2013): Peronema Forestry Science Journal Volume 2 No. 2 2013 (Juni 2013)
Publisher : Program studi Kehutanan USU

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Abstract

Mapping the potential of carbon was an inventory activities that the carbon content and deposits can be mapped and known. Mapping the potential of carbon would provide information that will be useful in the management of peatland resources. The objective of this study was to map peatland area, know the type of land cover and know the amount of carbon stored in the peat. This research method was the analysis of Landsat ETM + image data of 2012, field measurements and sampling and soil analysis results of field measurements. The results showed the whole area of ​​peatland was 6289.08 ha or about 2.513% of the total land Humbang Hasundutan district. Land cover types are rice peat, peat swamp forests, non-vegetation, shrubs peat, peat mining areas, and coffee farming. Total carbon content in peat Humbang Hasundutan District of 170,45 tonnes. Peatland management should be done by considering the carrying capacity and environmental sustainability, in order to obtain benefits not only on the environment but also on the social and economic community. Keywords: Potential Carbon, Topogen Peat Land, Peat Land Carbon Mapping
Penilaian Kelas Kesesuaian Lahan Tanaman Kehutanan dan Pohon Serbaguna di Kecamatan Payung Kabupaten Karo (Land Suitability Evaluation of Forest Trees Species and Multi Purpose Trees Species in Payung Subdistrict, Karo Regency) Sitepu, Heri Rizki; Rahmawaty, Rahmawaty; Rauf, Abdul
Peronema Forestry Science Journal Vol 2, No 2 (2013): Peronema Forestry Science Journal Volume 2 No. 2 2013 (Juni 2013)
Publisher : Program studi Kehutanan USU

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Abstract

Land suitability evaluation is activity comparing conditions required by land utilization type with characteristics or land quality owned by used land. The purpose of this research was to evaluate  land suitability for forest trees species and multi purpose trees species in Payung Subdistrict Karo Regency. This research was conducted in four stages: 1) Research  preparations, 2) Undertaking research in location, 3) Data processing, 4) Result presentation. The method of this research is matching system. Location has 10 land units. Land unit components were including slope, soil type and land cover. Actual land suitability for Mahogany and Pine dominantly are non suitable and for Ecalyptus, Durian and Avocado are marginal suitable. Potential land suitability for Mahogany and Pine have the same  class as actual land suitability. It is  because the resistor  factor is permanently. Eucalyptus, Durian and Avocado have different land suitability as  actual land suitability for some land units. It is because the resistor factor isn’t permanently. Keywords: Land Evaluation, Land Suitability, Land Unit
Co-Authors . Rosmayati Abdul Aziz Jemain Abdullah Abdullah Abusari Marbun, Abusari Achmad William Halimas, Achmad William Adei Johan M Banurea Aiyen, Aiyen Aiyen, Aiyen Akbi, Denar Regata Ali Karim Andi Asni, Andi Anis Nurwidayati Asbar Asbar, Asbar Asmarlaili Sahar Hanafiah Asmidar Asmidar Ayu, Neneng Gusti Ayyub, Fachrie Rezka B. Sengli Damanik Bejo Slamet Benny Hidayat Bentrovolta Bentrovolta, Bentrovolta Bintang Sitorus Budi Hartono Budiarto Budiarto C. Kusmana CECEP KUSMANA CHAIRANI HANUM Daniel H Tampubolon Delvian Delvian Deni Elfiati Denny R. Siregar Dewi Budiati T.J. Said Dodi Bagus Widodo, Dodi Bagus Dwi Putriana Br Tambunan, Dwi Putriana Edi Purwanto Edi Sigit Sutarta, Edi Sigit Edy Frans Redoman Nadapdap Erwin Masrul Harahap Faiqurahman, Mahar G. Gravenhorst Gantar Sitanggang Ghafarunnisa, Desyana Gingga, Flaminggo Grandis Tua Sitanggang H. Pawitan Hamidah Hanum Harahap, Fitra Syawal Hardy Guchi Heri Rizki Sitepu Hidayat Pawitan Hutapea, Yunita Carolin Indun Titisariwati, Indun Inmarlinianto Inmarlinianto, Inmarlinianto Istiqamah, Annisa Kemala Sari Lubis Kurniawan, Achmad Reza Lahuddin Musa Lambok M. Siallagan, Lambok M. M Hadi Syahlan Hasibuan, M Hadi Syahlan Mariani Sembiring Marthen Arie Mhd Arian Torang mico saputra, whin themas Mr. Irwansyah Muh Yusuf Muhammad Arif Setiawan Muhammad Lazuardi Prasadewo, Muhammad Lazuardi Muhammad Madjid B. Damanik Muhammad Maksum Harahap Mukhlis Mukhlis Mustakim Mustakim Ngatimin, Ngatimin Novita Ariani Sitorus, Novita Ariani Nur Ali Amri, Nur Ali Nurhidayat, Iwan Pasaribu, Parlin Hotmartua Putra Pasaribu, Parlin Hotmartua Putra Phetisya Pamela Frederika Sumolang Posma Marbun Pratama Bayu Santosa Purba Marpaung Rahmawaty Rahmawaty Raja Forman Barasa Razali Razali Rika Tamika, Rika Rina Maharany Riri Rizki Chairiyah Rismang, Rismang Rukmi, Sindy Sella Rustam Rustam Ryan Arviandi, Ryan Sahala M Manurung Sakka Samudin Salmiah Salmiah Sidabuke, Simon Haholongan Sihotang, Tambun Silvia Nora, Silvia Simarmata, Juliana Epesus Simbolon, Shanti Desima Siregar, Nicho Chandra Surianto Surianto Syahruddin Syahruddin T. June T. Sabrina TANIA JUNE Usman Made Utami, Khairuna Wan Arfiani Barus Zainal Arifin Hasibuan Zulkifli Nasution