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<![CDATA[OPTIMASI PARAMETER MODEL MOCK UNTUK MENGHITUNG DEBIT ANDALAN SUNGAI MIU ]]>
<![CDATA[Tunas, I Gede]]>
<![CDATA[ SMARTek Vol 5, No 1 (2007) ]]>
Publisher : <![CDATA[SMARTek ]]>
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<![CDATA[Model Mock merupakan model hidrologi yang digunakan untuk mengananalisis sistem DASdalam memprediksi respon hidrologi dari suatu masukan kejadian hujan dan iklim. Model Mockperlu dioptimasi/kalibrasi untuk memperoleh nilai parameter optimal dengan cara menyesuaikanparameter model hingga hasil optimasi menghampiri data historis. Penyesuaian parametermodel dilakukan dengan memaksimalkan koefisien korelasi dan volume error dari debiitpengukuran dan debit optimasi. Hasil optimasi menunjukkan bahwa nilai parameter optimalselama 24 periode yang dinyatakan dengan fungsi tujuan memiliki koefisien korelasi sebesar 0.75dan volume error sebesar 0.00095]]>
<![CDATA[Prediksi Erosi Lahan DAS Bengkulu Dengan Sistem Informasi Geografis (SIG) ]]>
<![CDATA[Tunas, I Gede]]>
<![CDATA[ SMARTek Vol 3, No 3 (2005) ]]>
Publisher : <![CDATA[SMARTek ]]>
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<![CDATA[Sebagian endapan sedimen di muara Sungai Bengkulu diperkirakan berasal dari erosi permukaan di DAS. Alih fungsi lahan (land use) di DAS juga diperkirakan telah mempengaruhi laju erosi permukaan. Untuk memprediksi laju erosi permukaan DAS Bengkulu, penelitian ini dilakukan dengan menggunakan metode USLE dan Sistem Informasi Geografis sebagai alat bantu analisis data berbasis digital. Hasil penelitian menunjukkan bahwa laju erosi permukaan DAS Bengkulu adalah 40.64 ton/ha/tahun. Angka ini setara dengan 2.258 mm/tahun dan termasuk dalam kelas bahaya erosi II (15-60 ton/ha/tahun)/ringan berdasarkan klasifikasi USDA. Hal ini berarti bahwa erosi permukaan DAS Bengkulu memberi kontribusi kecil terhadap sedimentasi di muara]]>
<![CDATA[Pengaruh Prosedur Perkiraan Laju Erosi Terhadap Konsistensi Nisbah Pengangkutan Sedimen ]]>
<![CDATA[Tunas, I Gede]]>
<![CDATA[ SMARTek Vol 6, No 3 (2008) ]]>
Publisher : <![CDATA[SMARTek ]]>
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<![CDATA[Terdapat dua prosedur yang dapat digunakan untuk memperkirakan laju erosi dengan menggunakan metode USLE berdasarkan data historis (historical data) pada masa yang lampau. Cara pertama yakni dengan menganalisis laju erosi rata-rata bulanan untuk seluruh tahun data sekaligus. Keluaran dari cara ini adalah perkiraan laju erosi rata-rata bulanan. Cara yang kedua yakni dengan melakukan perhitungan laju erosi rata-rata bulanan untuk setiap tahun data. Perbedaan prosedur dalam memperkirakan laju erosi tersebut, memungkinkan terjadinya perbedaan angka laju erosi yang akan dinyatakan dengan angka nisbah pengangkutan sedimen (sediment delivery ratio, SDR). Penelitian ini mengkaji pengaruh kedua prosedur perkiraan laju erosi tersebut terhadap konsistensi nisbah pengangkutan sedimen. Hasil penelitian yang diterapkan pada sub-DAS Miu dan Wuno di Palu-Sulawesi Tengah menunjukkan bahwa angka nisbah pengangkutan sedimen (SDR) kedua prosedur tidak menunjukkan perbedaan yang besar, masing-masing sebesar 1.13 % dan 2.55 %.]]>
<![CDATA[PERENCANAAN BAK PENGENDAPAN DAN PENAMPUNGAN AIR YANG BERASAL DARI MATA AIR DI KECAMATAN LAMALA ]]>
<![CDATA[Sirampun, Maksi]]>;
<![CDATA[Saparudin, Saparudin]]>;
<![CDATA[Tunas, I Gede]]>
<![CDATA[ JOURNAL TEKNIK SIPIL DAN INFRASTRUKTUR Vol 3, No 2 (2013) ]]>
Publisher : <![CDATA[Jurusan Teknik Sipil Universitas Tadulako ]]>
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<![CDATA[District of Lamala Regency of Luwuk is the area in which shortage of water and difficulty in supplying the water needs of its population. This planning study aims to address the fresh water problem and determine the needs of fresh water , especially three villages in the District of Lamala namely village of Bonebabakal, Lomba and Poroan.The study was conducted by collecting primary data and secondary data, as well as direct observation in the field. Furthermore, to drain the water from the spring water to the deposition basin of 20m3 and reservoir basin of 50m3 at a service area with a distance of 3 km from the source and height difference of 128 meters can utilize the force of gravity. From the research, the spring discharge data obtained at 20.1 liters / sec and to meet the needs of local water services up to year 2031 the population projection can be calculated using the arithmetic and geometric methods.As a suggestion to optimize the volume of water , it should be made on the fresh water catchers building in the location of water springs as well as the manufacture of bags to drain the sediment sludge coming from the spring.  Keywords: depositional basin, reservoir, springs]]>
<![CDATA[PENGEMBANGAN JARINGAN DISTRIBUSI AIR BERSIH KECAMATAN PELING TENGAH ]]>
<![CDATA[Sampe, Nober]]>;
<![CDATA[Tunas, I Gede]]>;
<![CDATA[Andiese, Vera Wim]]>
<![CDATA[ JOURNAL TEKNIK SIPIL DAN INFRASTRUKTUR Vol 3, No 2 (2013) ]]>
Publisher : <![CDATA[Jurusan Teknik Sipil Universitas Tadulako ]]>
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<![CDATA[This study aims to provide an overview of the development planning of water distribution networks in the village of Patutuki District  of  Peling Tengah,  considering  the region located in the coastal areas with limited of surface water sources, moreover the constriction and leakage in pipelines and water quality containing calcium or poor maintenance, so the flow of water to the consumer is reduced. The scope of study is limited to the analysis of the availability of water discharge mainstay as one of the water sources in the village Patutuki using FJ. Mock and calculate the  domestic  water  supply  in  the  village  of Patukuki District of Peling Tengah depended on the number of population. Furthermore, network planning distribution of domestic water in the service area by gravity through the branching system and closed pipes. For secondary data collection was carried out in the form of meteorological data, population data, topographic data and the data of land-use. Then calculate the water needs to be compared with the discharge mainstay. The result is the minimum river discharge mainstay of Bebek River which is the main water source to meet water needs in the area of service to 20 years .The maximum pressure meets the maximum permissible limit of 10 kg/cm2 and also meet the maximum speed limit is a maximum of 3 m3/sec. For the required number of plumbing needs in this plan that HDPE pipe ø 102 mm by 108 rods , PVC pipe ø 102 mm 33 rods , PVC pipe ø 76 mm 557 rods , and PVC pipe ø 51 mm 749 rods.  Keywords: water distribution networks, domestic water, Peling Tengah]]>
<![CDATA[ANALISIS PENYIMPANGAN PERKIRAAN DEBIT MENGGUNAKAN MODEL MOCK DAN NRECA ]]>
<![CDATA[Tunas, I Gede]]>;
<![CDATA[Lesmana, Surya Budi]]>
<![CDATA[ JOURNAL TEKNIK SIPIL DAN INFRASTRUKTUR Vol 1, No 1 (2011) ]]>
Publisher : <![CDATA[Jurusan Teknik Sipil Universitas Tadulako ]]>
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<![CDATA[Keterbatasan data hidrometri yang digunakan untuk analisis hidrologi berkaitan dengan pengembangan sumber daya air, mengharuskan perkiraan debit di sungai harus dilakukan berdasarkan data hujan menggunakan model hidrologi. Namun harus disadari bahwa kinerja model yang ada umumnya terbatas. Hampir semua model hidrologi tidak dapat sepenuhnya menirukan perilaku DAS khususnya dalam mengalihragamkan hujan menjadi debit. Keterbatasan ini berkaitan dengan kompleksitasnya masukan dan sistem DAS yang tidak sepenuhnya terwakili di dalam model. Oleh karena itu, model-model hidrologi tersebut harus dioptimasi sebelum digunakan dalam analisis. Penelitian ini bertujuan untuk menyelidiki kinerja model dengan mensimulasi penyimpangan dan parameter model oiptimal menggunakan Model Mock dan NRECA yang diaplikasikan di pada DAS kecil dalam hal ini DAS Bangga di Sulawesi Tengah. Hasil simulasi menggunakan parameter sembarang menunjukkan bahwa penyimpangan rata-rata dari kedua model (Mock dan NRECA) berturut-turut adalah 70.25 % and 85.93 %. Simulasi menggunakan parameter optimal, dapat menurunkan penyimpangan rata-rata menjadi 15.88 % and 23.97 % untuk kedua model. Hasil simulasi juga menunjukkan bahwa parameter optimal dari kedua model memiliki kesalahan volume sebesar 0.00056 and 0.000724 dan koefisen korelasi 0.875 and 0.824.]]>
<![CDATA[PENGARUH POLA DISTRIBUSI HUJAN TERHADAP PENYIMPANGAN DEBIT PUNCAK HIDROGRAF SATUAN SINTETIK NAKAYASU ]]>
<![CDATA[Tunas, I Gede]]>;
<![CDATA[Tanga, Arody]]>
<![CDATA[ MEKTEK Vol 13, No 1 (2011) ]]>
Publisher : <![CDATA[MEKTEK ]]>
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<![CDATA[There are many methods which used to analyze flood hydrograph, started from the simplest Rational Methods to the most complex mathematical models. One of them is Nakayasu Synthetic Unit Hydrograph (SUH) which has been known and used in wide area. Without realized, actually the use of the methods has been given a large deviation if compared with the measured river hydrograph. It is especially caused by the using of rainfall distribution pattern which be the input of the Nakayasu SUH Methods. This research was conducted to investigate the effect of rainfall distribution pattern to the peak discharge of Nakayasu SUH Methods using some rainfall distribution pattern such as Mononobe, ABM and Tadashi Tanimoto which applied on Bangga watershed. The result of the research using 10 elected flood data show that the average deviation from the biggest to the smallest, respectively are Mononobe (69.42 %), ABM (59.44 %) and Tadashi Tanimoto (22.42 %)]]>
<![CDATA[Analysis of Main Morphometry Characteristic of Watershed and It’s Effect to The Hydrograph Parameters ]]>
<![CDATA[I Gede Tunas]]>;
<![CDATA[Nadjadji Anwar]]>;
<![CDATA[Umboro Lasminto]]>
<![CDATA[ IPTEK The Journal for Technology and Science Vol 28, No 1 (2017) ]]>
Publisher : <![CDATA[IPTEK, LPPM, Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/j20882033.v28i1.2220
<![CDATA[Until today, the development of synthetic unit hydrograph model is still based on morphometry characteristic of watershed or combine with other parameters. According to Sri Harto (1985), There are at least four main characteristic morphometry of watershed which highly influenced to the hydrograph and can be easily quantified namely watershed area (A), main river length (L), main river slope (S) and form factor (FB). This research aim is to analyze and verify these four factors and it’s effect to the three of hydrograph parameters i.e. peak time (TP), peak flow (QP) and base time (TB). This research was carried out in eight watersheds in Central Sulawesi Province Indonesia as the base of variable preparation to develop synthetic unit hydrograph model. Main morphometry analysis of watershed was conducted by using geographical information system (GIS) software, referring to Indonesia Topographic Map (RBI) data combined with Digital Elevation Model-Shuttle Radar Topographic Mission (DEM-SRTM) data, to determine the area (A), main river length (L), main river slope (S) and form factor (FB) of every analyzed watershed. The research showed that eight observed watersheds had an area (A) of 23.88 km2 to 144.73 km2, main river length (L) of 10.31 km to 28.69 km, main river slope (S) of 0.03422 to 0.10812 and form factor (FB) of 0.21 to 0.49. From correlation analysis, It seen that the watershed area affected very well to peak flow (QP) with correlation coefficient of 0.98. The main river length also affected very well to the peak time (TP) with correlation coefficient of 0.99. Two others morphometry parameters namely main river slope (S) and form factor (FB) did not show the effect which could be concluded. These two parameters showed low correlation coefficient.]]>
<![CDATA[Analisis Banjir Rancangan dengan Mempertimbangkan Karakteristik Fraktal Daerah Aliran Sungai (Studi Kasus: Bendungan Way Apu di Pulau Buru, Provinsi Maluku) ]]>
<![CDATA[Mohamad Bagus Ansori]]>;
<![CDATA[I Gede Tunas]]>;
<![CDATA[Nastasia Festy Margini]]>
<![CDATA[ Jurnal Hidroteknik Vol 2, No 2 (2017) ]]>
Publisher : <![CDATA[Institut Teknologi Sepuluh Nopember ]]>
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DOI: 10.12962/jh.v2i2.4411
<![CDATA[Penelitian ini menyajikan permodelan matematika untuk mensimulasikan banjir rancangan pada bendungan Way Apu dengan mempertimbangkan karakteristik fraktal dari DAS. Bendungan Way Apu yang terletak di Sungai Way Apu, Maluku, Indonesia di bangun sebagai bendungan multiguna seperti irigasi, pembangkit listrik tenaga air (PLTA), air baku, dan untuk pengendali banjir sebagai tujuan utama. Analisa banjir rancangan pada bendungan ini mendapatkan beberapa kendala karena besarnya curah hujan di wilayah timur Indonesia, terutama di Pulau Buru Provinsi Maluku. Desain banjir untuk Dam tipe urugan di bawah 40 m di Indonesia mengacu pada SNI-3432-1994, menggunakan kemungkinan banjir maksimum periode ulang 1000 tahun untuk perencanaan risiko besar. Makalah ini akan menganalisis desain banjir Bendungan Way Apu dengan periode ulang 1000 tahun dengan mempertimbangkan karakteristik fraktal dari DAS menggunakan hidrograf sintetik ITS-2. Hasil perhitungan menggunakan HSS ITS-2 diperoleh nilai banjir rancangan sebesar 2454,15 m3/dt. Perhitungan penelusuran banjir (flood routing) diperoleh penurunan debit outflow sebesar 3,65% dengan Panjang pelimpah (spillway) 60 m, dengan elevasi mercu pada elevasi +134.]]>
<![CDATA[PKM Pemanfaatan Sekam Padi Sebagai Alternatif Campuran Material Dinding Ringan Untuk Mendukung Hunian Tahan Gempa di Kota Palu ]]>
<![CDATA[I Gede Tunas]]>;
<![CDATA[Asrafil Asrafil]]>;
<![CDATA[Ni Made Suwitri Parwati]]>
<![CDATA[ Jurnal Pengabdian Magister Pendidikan IPA Vol 4 No 3 (2021) ]]>
Publisher : <![CDATA[Universitas Mataram ]]>
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DOI: 10.29303/jpmpi.v4i3.926
<![CDATA[The involvement and empowerment of communities affected by the September 28, 2018 Palu Earthquake in their home areas is an opportunity that can be taken to contribute to residential reconstruction. Currently, the rehabilitation and construction of housing requires a lot of materials that support earthquake-resistant buildings, one of which is construction materials for the walls of houses or dwellings that have light weights such as light bricks, which are mostly supplied from outside the Central Sulawesi area. For this purpose, this paper presents the results of the implementation of the Community Partnership Program (PKM) in disaster-affected communities by utilizing rice husks as light brick materials. Implementation of the program begins with socialization to prospective participants and continues with the work and testing of light brick samples, training to make lightweight bricks, monitoring and evaluation. The test results show that light brick made of a mixture of cement, husk and sand (Type II) with a volume ratio of 1:1.5:4.5 still meets the requirements as a house wall material and it is included in Quality Level III (SNI 03-0349-1989) for the use of unprotected non-structural walls, may be exposed to rain and heat with an average compressive strength of 35 kg/cm2. This type II brick is then recommended as a wall material, where this type provides a weight reduction of 54.85% from the weight of conventional bricks. A review of the results of program implementation shows that the affected communities represented by 50 respondents gave a fairly good perception of the acceptance of light bricks as wall material with a score of 3.70 of 5. Evaluation of the program showed that 80% of all respondents stated that they were skilled at making light bricks. and they will develop these material to support the reconstruction of housing in Palu]]>
