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Entries categorized as ‘research’

CHARACTERIZATION OF ANNUAL MAXIMUM DAILY RAINFALL IN TIMIKA REGION, PAPUA

June 6, 2009 · Leave a Comment

Budhi Setiawan1, Edy Sutriyono2, Didiek Subagio3 and Edi Riawan4

1Civil Engineering Department, Faculty of Engineering, Sriwijaya University

(Jl. Raya Prabumulih KM 32 Indralaya, Sumatera Selatan)

E-mail: budhi@wgtt.org

2Mining Engineering Department, Faculty of Engineering, Sriwijaya University

3FT Freeport Indonesia, Timika Papua

4Research Center for Climate Change – Bandung

Characterization of annual maximum daily rainfall is one important point that is to be used in Modified Ajkwa Deposition Area development planing e.g. embankment, river channel. It is expected that the result of this study can be used as an input to the formulation of homogeneous regions in the regional analysis. The hourly rainfall data from one rainfall station during one day which has annual maximum daily rainfall data is matched to other stations to get correlation coefficient. It is assumed that two stations have strong relationship when the coefficient of correlation has a value of more than 0.70. The data used in this study is taken from 19 stations around PT Freeport Indonesia with the total length of the recorded data is about 10 years. The temporal characteristic is also studied in the viewpoint of wet and dry season by using frequency analysis of occurring extreme rainfall.

Keywords : extreme rainfall, spatial, temporal, correlation coefficient, tendency

submitted to HATHI Annual Meeting, October 2009, Banjarmasin.

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VULNERABILITY OF SMALL ISLANDS TO CLIMATE CHANGE IN INDONESIA: A case study of Lombok Island, Province of Nusa Tenggara Barat

April 12, 2009 · 2 Comments

Djoko Suroso1, Tri Wahyu Hadi2, Ibnu Sofian3, Hamzah Latief4,

Oman Abdurahman5, Hendra Julianto6 and Budhi Setiawan7,

1Lecturer, Regional and Urban Planning Department, Bandung Institute of Technology, Bandung INDONESIA

2Lecturer, Meteorology Department, Bandung Institute of Technology, Bandung INDONESIA

3Researcher, National Agency for Surveying Mapping, Cibinong, Bogor, INDONESIA

4Lecturer, Oceanography Department, Bandung Institute of Technology, Bandung INDONESIA

5Researcher, Geological Agency, Ministry of Mining and Energy Resource, Bandung INDONESIA

6Researcher, Research Centre for Adaptation to Climate Change, Bandung INDONESIA

7Lecturer, Postgraduate Program of Civil Engineering and Environmental Science,

University of Sriwijaya, Palembang INDONESIA

E-mail: dsuroso@pl.itb.ac.id and suroso.djoko@gmail.com

Due to its geographical and socio-economic circumtance, the majority of regions in Indonesia are considered to be vulnerable to potential impact of climate change. Therefore, the option for adaptation measure at national and regional levels are rapidly emerging as central issues to debate arround policy responses to climate change. In order to prioritize, design and implement intervention to adapt to climate change, it is essential to adopt a coherent set of approach, framework and method for examining vulnerability and adaptive capacity.

Many vulnerability studies while effective in making awareness to the possible effect of climate change, have limited effectiveness in providing local scale guidance on adaptation. Methods and tools for supporting the process of building adaptive capacity at the provincial/local level are different from the one used for assessing impacts, vulnerability and adaptation on national and global scales.

To effectively formulate adaptation strategy at the province level, it is proposed to apply ”meso level-multi sectoral approach” which means assessing vulnerability at the meso-level but considering the multi sectoral impacts of climate change i.e. water and ocean sectoral. The regional approach in climate vulnerability studies is a useful approach because many practical adaptation strategies will be applied at a regional rather than sectoral scale and climate change impacts vary from region to region (DEH Australia, 2005)

The Lombok Island was selected as a case study area because it represents small islands which could experience harmfull impact from climate change. Lombok Island is part of Nusa Tenggara Barat Province which has already prepared Provincial Action Plan for Mitigation and Adaptation to Climate Change. It shows serious commitment of its provincial government in preparing its society to face impact of climate change.



Key Words : climate change, vulnerability, adaptation, small island.

presented at World Oceanic Conference 2009, 4-6 May, Menado – INDONESIA, Paper Number: 31

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Estimation of river-bed morphology using S-PLUS

April 11, 2009 · Leave a Comment

Budhi Kuswan Susilo1, Budhi Setiawan2, Edy Sutriyono3

1PhD Candidate, Postgraduate of Environmental Science, Sriwijaya University

2Civil Engineering Department, Sriwijaya University (IAMG Members: 2645)

3Mining Engineering Department, Sriwijaya University

River-bed morphology is a product of sediment material that is transported by streams. The hydrology and morphology are interpreted to be control the form of river channel. This research is focussed of river-bed morphologic changes that influenced by tailing impoundment in Ajkwa lowland, Timika, Papua. The river transects data give variation in surface profiles of Modified Ajkwa Depositional Area (ModADA). Hence, maps based on shape of change in the river-bed morphology. The significant criteria of selected observation based on channel form in straight to get variation in bed forms per annual discharge. Rapid and frequent variation in Q tend to increase the magnitude of the alternating patterns of erosion and deposition that seem to be a necessary part of braiding mechanics. Combination of discharge and sediment load include tailing drops in highland refer the relationship of river-bed morphology and hydraulic efficiency can de made quantitatively. Computation and estimation of bed river morphology using S-PLUS for Windows, that is an object-oriented programming and visualization environment.

Keywords : river bed morphology, discharge, tailing impoundment.

accepted to present at IAMG Annual Conference, Stanford University California, 23-28 August 2009

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The Rainfall Influence to River-bed morphology

April 11, 2009 · Leave a Comment

Budhi Kuswan Susilo1, Budhi Setiawan2, Edy Sutriyono3

1PhD Candidate, Postgraduate of Environmental Science, Sriwijaya University

2Civil Engineering Department, Sriwijaya University

3Mining Engineering Department, Sriwijaya University

The river flow and sediment material is controlling characterization of river-bed morphology. This research is focussed on development of river-bed morphology due to the variation of Q trend that is delivered by rainfall data. The river transects data give variation in surface profiles of channels in Modified Ajkwa Depositional Area (ModADA), Timika, Papua. The form of straight channel selected to be observation, contouring and made in cross section. This result is a respond to dynamic change in rapid and frequent variation in Q tend to increase the magnitude of sedimentation that seem to be a necessary part of braiding mechanics and can be made quantitatively.

Keywords : river bed morphology, discharge, river transect data, braiding mechanics

submitted to The 38th IAGI Annual Convention & Exhibition

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A preliminary study of bearing capacity map in Palembang Region

April 11, 2009 · Leave a Comment

Budhi Setiawan1, Irma Sepriyana2, and Maulid M. Iqbal1

1Civil Engineering Department, Sriwijaya University Jl. Raya Palembang Prabumulih Km. 32 Ogan Ilir e-mail: budhi@wgtt.org

2Postgraduate student, Civil Engineering Department Sriwijaya University Jl. Padang selasa No. 32 Bukit Besar Palembang

Since on soft soil, large settlement might be occur under loaded foundation without actual shear failure occurring, the map of bearing capacity based soil investigation in soft soil area e.g. Palembang is become important. Among the different in situ tests, sondir is a simple, quick, and economical test that provides reliable in situ continuous soundings of subsurface soil. In Indonesia, sondir is considered the most frequently used method for characterization of geomedia. This research focused on site characterization of soil properties based on sondir data. This procedure is very important due to management data of soil field test is still conventional and unstructured.

Keywords: sondir, soft soil, soil characterization, bearing capacity

submitted to The 38th IAGI Annual Convention & Exhibition

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PIT IAGI 2009

March 15, 2009 · 4 Comments

Call for Papers from The 38th IAGI Annual Convention & Exhibition
The Convention will take place 13-14 October 2009 at Semarang, Central Java Province.
This event is hosted by Pengda IAGI Jateng.

This year, The 38th IAGI Annual Convention & Exhibition offers several program for its participants, including :

- Technical program
- Exhibition
- Professional Courses
- Technical field trips
- Panel Discussion
- Student Program
- Sport program
- Educational day
- And more…….

Call for papers now open!

The Program Committee is now accepting abstract proposals for full paper
Submit your abstract online
Deadline: 4 April 2009

This is your opportunity to contribute to the value of the IAGI and to advance your professional career as a published author.
Please distribute this information to your colleagues.
Enjoy Semarang………………

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PIT HATTI 2008

November 22, 2008 · Leave a Comment

Tanggal 18 dan 19 November 2008, berkesempatan mengikuti Pertemuan Ilmiah Tahunan Himpunan Ahli Teknik Tanah Indonesia 2008 atau disingkat PIT HATTI 2008. Acara ini diadakan di Savoy Homman Bandung dan diikuti oleh cukup banyak peserta. Tema dari PIT tahun ini adalah Contributions of Geotechnical Engineering to Sustainable Civil Constrtuction.

Keynote Speaker pada PIT kali ini adalah Prof. Junichi Koseki (Tokyo University), Prof. Leung Chun-Fai (NUS), Prof. Shanon Hsien Heng-Lee (NTUST), Prof Susumu Iai (Kyoto University), Masyhur Irsam, PhD (ITB), Prof. Paulus P. Raharjo (Unpar).

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Penelitian slope stability

November 9, 2008 · Leave a Comment

Wikinomics menuliskan bahwa keterbukaan akan meningkatkan kemampuan meneliti dan hasil penelitian ke arah yang lebih baik. Keterbukaan bukan merupakan ancaman selama kita mau menerima kritikan dan menghargai orang sebagaimana mestinya. Tidak ada batasan ruang yang membatasi seseorang dalam melakukan aktivitasnya, bahkan sebaliknya ruangan dapat menjadikan terkuncinya ide bahkan bisa memberangus idenya. Mungkin seperti burung dalam sangkar yang selalu terkekang hidupnya, seperti burung beo bisa berkicau mengikuti keinginan tuannya. Peribahasa setinggi-tinggi terbang bangau akan hinggap di kubangan, nampaknya pola pikir dengan paradigma ini akan lebih baik, wallahualam ..

Pemikiran inilah yang menjadikan dasar untuk menuliskan beberapa judul penelitian yang terkait dengan slope stability. Perubahan pendekatan dari saturated soil ke unsaturated soil, akan dijadikan pijakan untuk penelitian di masa mendatang. Penelitian ini diharapkan akan merupakan penelitian multi angkatan, yang diharapkan hasilnya layak untuk masuk ke jurnal-jurnal ilmiah.

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Kerajaan Palembang

September 27, 2008 · 3 Comments

Dalam buku Sejarah Sumatera, ada beberapa halaman yang menjelaskan tentang Kerajaan Palembang. Tidak banyaknya cerita sejarah mengenai Palembang, karena dibawah kekuasaan Belanda. Penjelasan Palembang dalam buku Marsden tersebut adalah sebagai berikut:

Kerajaan Palembang adalah kerajaan yang cukup penting. Sungainya termasuk yang terbesar di Sumatera. Sungai itu berhulu di Musi yang terletak di balik Bukit Barisan. Oleh karena itu, hulu sungai itu bernama Ayer Musi. Adapun hilir sungai mendapat nama Tatong. Lebar sungai itu lebih dari satu mil. Sungai itu dapat dilayari dengan aman oleh kapal yang bagian bawah permukaan airnya tidak lebih dari 14 kaki. Kapal-kapal yang lebih besar dari itu datang ke sana untuk tujuan militer, seperti yang terjadi pafa tahun 1680 ketika Belanda menyerang dan menghancurkan tempat itu.

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Hasil Akreditasi

September 10, 2008 · 13 Comments

Tadi malam menerima dua buah sms dari Ketua dan Sekretaris Jurusan Teknik Sipil, Universitas Sriwijaya Palembang. Kak Taufik Ari Gunawan, mengirimkan sms yang bunyinya

GOOD NEWS. Alhamdulilah, Jurusan Teknik Sipil FT Unsri berhasil mempertahankan peringkat akreditasi “A”. Pimpinan Jurusan mengucapkan ribuan terima kasih dan penghargaan kepada seluruh dosen dan karyawan Teknik Sipil atas dukungan dan kerja samanya.

Kemudian disusul oleh Pak Imron F. Astira, Ketua Jurusan, yang bunyinya

Alhamdulilah do’a dan ikhtiar kita untuk berbuat yang terbaik bagi Jurusan Teknik Sipil tempat kita mengabdi ternyata dikabulkan Allah SWT. Dari lubuk hati yang paling dalam saya berterimakasih kepada rekan-rekan semua yang telah bekerja keras demi tercapainya tujuan mempertahankan akreditasi “A” kita. Bravo Teknik Sipil Unsri. Terima kasih.

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