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All Journal Jurnal Silvikultur Tropika (JST) Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Reaktor Sains Tanah Jurnal Sumberdaya Lahan Jurnal Tataloka SAINS TANAH - Journal of Soil Science and Agroclimatology Journal of Regional and Rural Development Planning Soil REns Jurnal Sumberdaya Lahan Jurnal Tanah dan Iklim

Darmawan

Departemen Ilmu Tanah Dan Sumberdaya Lahan Institut Pertanian Bogor, Jalan Meranti Kampus IPB Dramaga Kab. Bogor 16680 Indonesia

Author-ID : 2548767

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Materials Science & Nanotechnology Social Sciences

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RAGAM KONTEKS SKALA DALAM PERSPEKTIF KAJIAN SUMBERDAYA LAHAN Cahyana, Destika; Barus, Baba; Darmawan, Darmawan; Mulyanto, Budi; Sulaeman, Yiyi
Jurnal Sumberdaya Lahan Vol 13, No 2 (2019)
Publisher : Indonesian Center for Agriculture Land Resource Development

Abstrak. Kini isu ?skala? menjadi penting kembali dibahas oleh komunitas sumberdaya lahan. Awalnya sumberdaya lahan terbatas dikaji oleh disiplin ilmu tanah, ilmu geografi, dan ilmu kartografi, tetapi sekarang berkembang dikaji oleh disiplin ilmu lingkungan, ilmu iklim, ilmu statistik, serta ilmu teknologi dan informasi. Kajian sumberdaya lahan yang awalnya untuk kepentingan ilmu pertanian kini menghadapi problem yang lebih luas seperti perubahan iklim, krisis energi, keanekaragaman hayati, keseimbangan ekosistem, hingga perkembangan kota. Pada era ini perjumpaan ilmu tanah dengan disiplin ilmu lain tidak dapat dihindarkan karena telah menjadi keniscayaan untuk melayani kepentingan umat manusia yang lebih luas. Berkaitan dengan itu istilah ?skala? yang digunakan pada disiplin ilmu tanah, ilmu geografi, dan ilmu kartografi seringkali membingungkan ketika berjumpa dengan istilah ?skala? pada kajian sumberdaya lahan kontemporer. Skala dapat dipahami dalam beragam konteks: 1) skala informasi pada peta, 2) skala level pada berbagai proses, dan 3) skala pada angka pengukuran. Tiga konteks skala tersebut belum termasuk skala pada dimensi lain yaitu skala waktu yang tidak akan dibahas pada artikel ini. Abstract. At present the issue of 'scale' becomes important to be rediscussed by scientists in land resources community. Initially, land resources were only studied by the limited disciplines, such as soil science, geography, and cartography, but now it is studied by the disciplines of environmental science, climate science, statistics, and technology and information science. At the beginning, the study of land resources was to support agricultural science, but at the present the study is to addresss broader problems such as climate change, energy crises, biodiversity, ecosystem balance, and urban development. In this era, the encounter of soil science with other scientific disciplines is inevitable because it has become a necessity to serve the broader of humanity interest. Related to that issue, the term of 'scale' used in the disciplines of soil, geography and cartography is often confusing when meeting to other different disciplines. There are at least 3 different contexts that use the term 'scale' in contemporary land resource studies i.e : 1) scale of information on maps, 2) scale of levels in various processes, and 3) scale of measurement numbers. These three contexts of scale are not included scale of time another dimensions that will not be discussed in this article.

The Utilization of Red Mud as a Plant Growing Medium with The Addition of Ultisol Soil Material and Compost Septi Nurul Aini; Iskandar Iskandar; Darmawan Darmawan
Sains Tanah - Jurnal Ilmu Tanah dan Agroklimatologi Vol 14, No 2 (2017)
Publisher : Faculty of Agriculture, Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15608/stjssa.v14i2.863

The utilization of red mud, which is a residue from the extraction of aluminum from mined bauxite ore, as a plant growing medium, needs to be studied further. There are some chemical aspects that may hinder the growth of, or even cause mortality in, plants such as very high pH, electrical conductivity (EC) and exchangeable Na (Naexch), and very low nutrient elements content. The objective of this study was to investigate the effects of adding Ultisol soil material, mixed with compost, both soil ameliorating agents, to red mud for use as a growing medium for Sengon (Paraserianthes falcataria) seedlings. This study was conducted in two stages, namely: washing of the red mud, and trial planting in the greenhouse using different combinations of the soil ameliorants. Washing of the red mud with tap water was intended to reduce the levels of Na, EC, and pH. Trial planting in the greenhouse was carried out in 2-factorial Completely Randomized Design (CRD). Factor 1 was the proportion of the mixture of Ultisol soil material (sm-Ultisol) and red mud, viz: (1) 1500 g red mud + 0 g sm-Ultisol, (2) 1000 g red mud + 500 g sm-Ultisol, and (3) 750 g red mud + 750 g sm-Ultisol. Factor 2 was the dosage of compost that was mixed with the red mud and sm-Ultisol, namely: 0, 58.6, and 117.2 g/polybag which corresponded to 0, 2.5 and 5 kg/planting hole, respectively. The results of the trial indicated that washing the red mud could reduce the level of EC from 28.70 dS m-1 to 2.68 dS m-1; but it reduced pH and Naexch only from 11.91 and 149.38 cmol(+)kg-1 to become 10.55, and 66.74 cmol(+) kg-1, respectively. A better outcome was obtained after the red mud was washed and then, mixed with sm-Ultisol up to 1:1 proportion in which resulted in lower rates of pH, EC, and Naexch from 10.28, 2.53 dS m-1 and 62.79 cmol(+) kg-1 to 8.65, 2.07 dS m-1 and 45.01 cmol(+) kg-1, respectively. The treatment of using a mixture of 750 g red mud + 750 g sm-Ultisol, and adding compost at 117.18 g/polybag gave the best result in improving the chemical property of the red mud growing medium, and producing the best plant growth among all treatment combinations.

Analisis Risiko Gempabumi di Cilacap Provinsi Jawa Tengah: Earthquake Risk Analysis in Cilacap, Central Java Province Muhaimin Muhaimin; Boedi Tjahjono; Darmawan Darmawan
Jurnal Ilmu Tanah dan Lingkungan Vol 18 No 1 (2016): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Gempabumi merupakan kejadian yang datangnya secara tiba-tiba. Hingga kini kejadian gempa bumi tersebut masih belum dapat diprediksi kedatangannya. Wilayah yang berdekatan dengan jalur subduksi pada umumnya merupakan wilayah yang rawan terhadap bencana gempabumi, seperti Kabupaten Cilacap yang berada di pesisir selatan Pulau Jawa. Gempabumi Tasikmalaya yang terjadi tanggal 2 September 2009, dengan magnitudo M 7.3 terbukti telah berdampak besar terhadap wilayah Kabupaten Cilacap. Hal ini yang membuat perlunya penelitian risiko gempabumi di wilayah Cilacap. Studi bahaya gempabumi dan kerentanan akan sangat mendukung untuk penilaian risiko maupun program mitigasi. Penelitian ini bertujuan untuk melakukan analisis dan pemetaan bahaya, kerentanan, dan risiko gempabumi di kota Cilacap. Metode untuk analisis bahaya gempabumi menggunakan nilai percepatan tanah maksimum di permukaan (PGAM) dari hasil metode probabilistik. Untuk kerentanan gempabumi ditentukan berdasarkan jenis penggunaan lahan. Adapun untuk perhitungan risiko bencana gempabumi digunakan persamaan R = H × V. Berdasarkan hasil analisis bahaya, didapatkan bahwa seluruh Kota Cilacap tergolong ke dalam kelas bahaya sedang dengan nilai PGAM bervariasi dari 0.405 – 0.494 gal. Berdasarkan hasil analisis kerentanan, diperoleh bahwa kerentanan tinggi terdapat di penggunaan lahan permukiman yang meliputi Desa-desa Tambakreja, Sidanegara, Donan, Tritih Kulon bagian selatan, Cilacap, Mertasinga, dan Kamulyan. Adapun hasil analisis risiko menunjukkan bahwa kelas risiko tinggi di daerah penelitian meliputi area seluas 3,237.40 ha yang terdapat di Desa-desa Lomanis, Tambakreja, Tritih Kulon, Sidanegara, Donan, Mertasinga, dan Cilacap, sehingga di desa-desa tersebut perlu mendapat perhatian dan prioritas untuk program mitigasi bencana ke depan. Kata kunci: Kota Cilacap, risiko gempabumi, percepatan tanah maksimum di permukaan, metode probabilistik

Potensi Pemanfaatan Tanaman Thypa sp dan Cyperus sp dalam Proses Remediasi Air Asam Tambang dengan Sistem Rawa Buatan Apong Sandrawati; Darmawan Darmawan; Dyah Tj. Suryaningtyas; Gunawan Djadjakirana
Soilrens Vol 16, No 1 (2018)
Publisher : Fakultas Pertanian Universitas Padjadjaran

Acid mine drainage (AMD) is the main problem in open pit mining due to extremely low pH and high solubility of metals. Metal solubility can be reduced biochemically in an anaerobic condition. This research was aimed to design and test artificial wetland system constructed. The artificial wetland has been constructed, it contains with two organic wall, two growing pond, and one collecting pond, each component bounded by dike. Organic wall was placed next to growing pond that planted by Typha sp and Cyperus sp. Collecting pond was planted by Eichornia crassipes. Iron and Manganese were accumulated in the root of each plant. Cyperus sp has a fibril type while Typha sp has rhizome type. The fine roots such as root of Cyperus sp could accumulation Fe higher than a rhizome roots such as root of Typha sp. Productivity of biomass was 31,38 ton/ha for Eichornia crassipes, 17,11 ton/ha for Typha sp, and 16,67 ton/ha for Cyperus sp. Eichornia crassipes has a higher biomass than other plants, but the size of this plant become smaller, it because the lack of nutrient in collecting ponds. Cyperus sp seems more prospective, this plant has better of growth rate than other plants.

KESESUAIAN Durio zibethinus Murr. DAN Nephelium lappaceum L. PADA LAHAN BLOK PEMANFAATAN TAHURA GUNUNG MENUMBING, BANGKA BARAT Suitability of Durio zibethinus Murr. and Nephelium lappaceum L. on the Utilization Block at Menumbing Mountain Grand Forest Nuri Nursjahbani; Omo Rusdiana; Darmawan .
Jurnal Silvikultur Tropika Vol. 9 No. 1 (2018): Jurnal Silvikultur Tropika
Publisher : Departemen Silvikultur, Fakultas Kehutanan dan Lingkungan, Institut Pertanian Bogor (IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/j-siltrop.9.1.1-6

The conversion of forests to non-forests by communities has resulted in the loss of forest ecosystems and a reductionin the area of land that can be utilized for nature tourism at Menumbing Mountain Grand Forest Park (MMGFP).Revegetation is needed by planting several types of forest vegetation that generate economic benefits for the communityas well as attracting natural tourism in MMGFP utilization block such as durian (Durio zibethinus Murr.) and rambutan(Nephelium lappaceum L.). It is necessary to evaluate utilization block to ensure that both species grow well andproductivity of fruits have optimal yield. This study aims to obtain recommendations for improvements of the land qualityalong with the suitable characteristics to be limiting the growth of durian and rambutan. Suitability evaluation of durianand rambutan refers to the land suitability classification criteria compiled by Indonesian Center for Agricultural LandResources Research and Development by matching the growth requirements of both types with land utilization blockcharacteristics. Durian and rambutan are considered to be marginally suitable (S3) for planting in most land utilizationblock. The limiting factor of durian and rambutan is rooting medium, i.e texture and nutrient retention, comprising pH ororganic carbon (C-organic). The texture of the soil can not be modified because it is permanent. Soil pH can beincreased through liming. The soil C-organic content can be increased through the application of organic fertilizer. Afterboth efforts are made, the planted durian and rambutan are likely to grow well and productivity of the fruit will beoptimal so that revegetation in the utilization block will be successful and problems faced in MMGFP will be solved.Key words: Liming, marginally suitable, organic fertilizer, revegetation

PENERAPAN ELEKTROOSMOSIS UNTUK PENGERINGAN SLUDGE DARI PENGOLAHAN LIMBAH CAIR Darmawan Darmawan; Dyah Tjahyandari Suryaningtyas; Juniska Muria Sariningpuri
Reaktor Volume 14, No. 3, APRIL 2013
Publisher : Dept. of Chemical Engineering, Diponegoro University

APPLICATION OF ELECTROOSMOSIS FOR DEWATERING OF SLUDGE FROM WASTE WATER TREATMENT. Wastewater treatment produces semi-solid residue (sludge) that must be handled carefully during dumping and discharge to avoid polluting the environment. A low cost and easy treatment of dewatering is needed. This research aimed to apply electroosmosis technique for dewatering sludge in order to seek for parameters that can efficiently reduce water content of sludge, including range of voltage, type of electrodes, and distance between electrodes; and to determine the effect of electroosmosis processes on changes of chemical characteristics of sludge. The results showed that: (1) electroosmosis dewatering occurred on the sludge taken from waste water treatment of landfill but not on sludge from water purification plant (PDAM), (2) direct current voltage of 30 volts was the optimum voltage, (3) copper rod cathode provided electroosmosis process as good as stainless steel cathode and both were better than the woven stainless steel cathode, (4) the dewatering time to reduce 1200% (w/w) water content to about 400% was about 40 hours for sludge of 2500 cm3 in volume (laboratory bench scale), (5) the anode need to reinserted gradually approaching the cathode due to current lost when the water content at the anode point reached 400% and sludge at the point shrink, and (6) some chemical elements in the sludge decreased significantly after treatment. Pengolahan limbah cair menghasilkan residu berupa bahan semi padat yang dikenal sebagai sludge. Sludge tersebut juga perlu dikelola penyimpanan dan pembuangannya agar tidak mencemari lingkungan. Salah satu pengelolaan sludge yang perlu dilakukan adalah pengeringan (dewatering). Salahsatu teknik dewatering yang mungkin diterapkan ialah teknik elektroosmosis, yaitu teknik yang memanfaatkan adanya pergerakan air pada media poros di dalam medan istrik searah. Penelitian ini bertujuan untuk mencari parameter sistem dewatering secara elektroosmosis yang dapat menurunkan kadar air sludge paling efisien dan untuk mengetahui pengaruh elektroosmosis terhadap karakteristik kimia sludge. Hasil penelitian menunjukkan bahwa: (1) pengeringan sludge terjadi pada jenis sludge IPAL TPA namun tidak pada jenis lumpur PDAM; (2) tegangan listrik searah sekitar 30 volt merupakan tegangan optimum; (3) katoda batang tembaga menghasilkan proses elektroosmosis yang sebanding katoda batang stainless steel dan lebih baik dibanding katoda stainless steel anyam; (4) waktu pengeringan dari kadar air awal 1200% (b/b) hingga kadar air akhir sekitar 400% untuk volume sludge 2500 cm3 (skala laboratorium) sekitar 40 jam; (5) anoda perlu dipindahkan secara bertahap mendekati katoda karena arus terputus pada saat sludge di titik anoda mencapai kadar air sekitar 400% dan mengalami pengerutan; dan (6) kadar beberapa unsur kimia dalam sludge menurun secara signifikan setelah perlakuan.

Perkembangan Wilayah, Keselarasan Penggunaan Lahan Dengan Pola Ruang, Dan Arahan Rencana Pengembangan Wilayah Kabupaten Tangerang Iis Rismawati; Santun R.P Sitorus; Darmawan Darmawan
TATALOKA Vol 23, No 1 (2021): Volume 23 No. 1, February 2021
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/tataloka.23.1.80-94

Tangerang Regency has an economic structure dominated by the industrial sector. Population distribution, settlement location and industrial influenced land use patterns and regional development levels in Tangerang Regency. The objectives of this research are: to analyze the level of regional development and regional development inequality and factors that influence regional development; to analyze regional typology; to evaluate the consistency of land use with the Spatial Planning; and to formulate direction of the Tangerang Regency regional development plan. The method used are scalogram analysis, theil entrophy index analysis, cluster analysis, overlay and descriptive analysis. The results showed that the regional development level of the southern part of the region was higher than the northern part and the level of regional development inequality in the northern part of the region was higher than the southern part. Factors that influence the level of regional development are the percentage of settlement and industry areas, and the value of economic index, education index, and health index. Concerning typology of the area, in the northern part land use is dominated by agriculture, while in the southern region dominated by settlements and industries. The inconsistency of land use with spatial plan found mostly in the northern region. Thus, the first priority of regional development direction is to be located in the northern part that has a low level of regional development, high inequality value, high percentage of inconsistency of land use with spatial plan, and land use that is dominated by agriculture.

Analisis Perubahan Penggunaan Lahan Dan Prediksinya dengan Menggunakan Markov – Cellular Automata Di Wilayah Peri Urban Kota Malang Mirza Permana; Santun Risma Pandopatan Sitorus; Darmawan Darmawan
TATALOKA Vol 23, No 3 (2021): Volume 23 No. 3, August 2021
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/tataloka.23.3.307-319

Peri Urban Area is a unique region with spatial dynamics that continues to experience changes that have an important role to play in the urban life in the future. There are 8 sub-districts in Malang Regency which are directly adjacent to Malang City and have a significant influence on the development of the city. Objectives of this research are to determine the dynamics of land use change from 2008 - 2018 and to predict land use in 2030. The method used is the analysis of land use changes from landsat TM 8 images in 2008 and 2013 to predict land use in 2018 which then tested the validity to get a level of accuracy. The results showed the development of built-up area has increased by 12% while agricultural land has experienced a declining trend. Significant changes occurred in Singosari, Pakisaji and Karangploso sub-district. Validation of land use between the predictions of 2018 and actual land use in 2018 showed that the value of kappa was quite high, at 87%. The trend of land use in peri-urban areas until the year 2030 is predicted to have built up area of 26,456 ha, which means an increase 17,686 ha (33.6%) from the existing year 2018. The potential incompatibility of the RTRW with the predicted land use in 2030 is 11,950 ha or 22.7%.

Ragam Konteks Skala Dalam Perspektif Kajian Sumberdaya Lahan Destika Cahyana; Baba Barus; Darmawan Darmawan; Budi Mulyanto; Yiyi Sulaeman
Jurnal Sumberdaya Lahan Vol 13, No 2 (2019)
Publisher : Indonesian Center for Agriculture Land Resource Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jsdl.v13n2.2019.115-124

Abstrak. Kini isu ‘skala’ menjadi penting kembali dibahas oleh komunitas sumberdaya lahan. Awalnya sumberdaya lahan terbatas dikaji oleh disiplin ilmu tanah, ilmu geografi, dan ilmu kartografi, tetapi sekarang berkembang dikaji oleh disiplin ilmu lingkungan, ilmu iklim, ilmu statistik, serta ilmu teknologi dan informasi. Kajian sumberdaya lahan yang awalnya untuk kepentingan ilmu pertanian kini menghadapi problem yang lebih luas seperti perubahan iklim, krisis energi, keanekaragaman hayati, keseimbangan ekosistem, hingga perkembangan kota. Pada era ini perjumpaan ilmu tanah dengan disiplin ilmu lain tidak dapat dihindarkan karena telah menjadi keniscayaan untuk melayani kepentingan umat manusia yang lebih luas. Berkaitan dengan itu istilah ‘skala’ yang digunakan pada disiplin ilmu tanah, ilmu geografi, dan ilmu kartografi seringkali membingungkan ketika berjumpa dengan istilah ‘skala’ pada kajian sumberdaya lahan kontemporer. Skala dapat dipahami dalam beragam konteks: 1) skala informasi pada peta, 2) skala level pada berbagai proses, dan 3) skala pada angka pengukuran. Tiga konteks skala tersebut belum termasuk skala pada dimensi lain yaitu skala waktu yang tidak akan dibahas pada artikel ini. Abstract. At present the issue of 'scale' becomes important to be rediscussed by scientists in land resources community. Initially, land resources were only studied by the limited disciplines, such as soil science, geography, and cartography, but now it is studied by the disciplines of environmental science, climate science, statistics, and technology and information science. At the beginning, the study of land resources was to support agricultural science, but at the present the study is to addresss broader problems such as climate change, energy crises, biodiversity, ecosystem balance, and urban development. In this era, the encounter of soil science with other scientific disciplines is inevitable because it has become a necessity to serve the broader of humanity interest. Related to that issue, the term of 'scale' used in the disciplines of soil, geography and cartography is often confusing when meeting to other different disciplines. There are at least 3 different contexts that use the term 'scale' in contemporary land resource studies i.e : 1) scale of information on maps, 2) scale of levels in various processes, and 3) scale of measurement numbers. These three contexts of scale are not included scale of time another dimensions that will not be discussed in this article.

Metode Alternatif Memperkirakan Konsentrasi Karbon Organik Terlarut dalam Air Saluran Drainase dan Tanah Gambut Muhammad Nuriman; Gunawan Djajakirana; Darmawan Darmawan; Gusti Z. Anshari
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) Vol 39, No 1 (2015)
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v39n1.2015.1-8

Co-Authors Apong Sandrawati Baba Barus Boedi Tjahjono Budi Mulyanto Cahyana, Destika Destika Cahyana Dyah Tj. Suryaningtyas Dyah Tjahyandari Dyah Tjahyandari Suryaningtyas Ernan Rustiadi Gunawan Djadjakirana Gunawan Djajakirana Gusti Z. Anshari Iis Rismawati Iskandar Iskandar Juniska Muria Sariningpuri Kenta Tsuchiya Muhaimin Muhaimin Muhammad Giri Wibisono Nur Izza Faiqotul Himmah Nuri Nursjahbani Nuriman, Muhammad Omo Rusdiana Permana, Mirza Rosalina, Febrianti Santun R.P Sitorus Santun Risma Pandopatan Sitorus Septi Nurul Aini Septiana, Liska Mutiara Shinya Funakawa Sudarsono Sudarsono Yiyi Sulaeman

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