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INDONESIA
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
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Core Subject : Engineering,
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Articles 3,145 Documents
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Analisis Investasi Penyediaan Air Baku Untuk Pdam Tirta Dharma Duri (Intake Air Baku Sungai Rokan) Syahrir, Alam; Siswanto, Siswanto; Komara, Rian Tri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

PDAM Tirta Dharma Duri is the only service provider of clean water Bengkalis thorn branch with sub-district service area Saber And District of Uptown. The PDAM Tirta Dharma spinesreceive water supply from PT Chevron Pacific Indonesia, with a small amount of clean water crisis that resulted in the service area. Responding to these conditions Bengkalis Governmentis determined to increase the supply of raw water to PDAM Tirta Dharma Thorns by building intake Sekapas River as one of the new raw water supply alternatives so that the water crisis that occurred can be overcome. This study examines the feasibility of the project Development of new raw water supply for PDAM Tirta Dharma Duris with intake Sekapas River. Investment feasibility indicator is the NPV (Net Present Value), BCR (Benefit Cost Ratio), IRR (Internal Rate of Return) and BEP (Break Even Point) as well as a sensitivity analysis. The cost of investment in this study uses data DED (Enginering Details desing) from the consultant planner RP. 203,254,685,215.00 with the results of the feasibility of aninvestment analyst for all parameters indicate the scope for further investment, due to the interest rate that is used by 13% showed the feasibility indicator, namely the value of apositive NPV, BCR values above 1 (one), the IRR is more of 13% (interest investment loans) and BEP less than 21 years.Keywords:Water supply, sensitivity analysis, NPV, BCR, IRR, BEP
Perbandingan Penggunaan Data Hujan Lapangan Dan Data Hujan Satelit Untuk Analisis Hujan-aliran Menggunakan Model Ihacres Reza Ahmad Fadhli; Bambang Sujatmoko; Sigit Sutikno
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

This study conducted an analysis of satellite rainfall data utilization as an alternative for hydrological modeling. Reliability of satellite rainfall data for hydrological modeling iscompared to the use of ground rainfall data. Rainfall-runoff modeling in this research is used IHACRES program by taking a case study in the Rokan watershed, Riau Province. IHACRESmodel output was compared and analyzed with the output of IFAS simulation. The length of the data used was four years (2003 - 2006) with the variation in the length of data scheme 1(three year calibration), Scheme 2 (two years calibration) and scheme 3 (one year calibration). The results showed that the use of satellite rainfall data for rainfall-runoff modeling IHACRES is better than using ground rainfall data based on the evaluation of the model accuracy coefficient of efficiency (CE). Such thing was reviewed by assessing the CE parameters that have better value, while the parameters R and VE have relatively similar results. CE value of ground rainfall data scheme 1, Scheme 2 and scheme 3 is 0,659; 0,715 and 1,003. CE value of satellite rainfall data 0,924 and 0,875. In general, based on the CE value of the parameter evaluation accuracy simulation step, the rainfall-runoff modeling IFAS using satellite rainfall data are more reliably than the rainfall-runoff modelingIHACRES that uses ground rainfall data and satellite, the value of CE rainfall-runoff modeling IFAS is 1,652.Keywords: ground rainfall data, IFAS, IHACRES, rainfall-runoff modeling, satellite rainfall data
Prediksi Respons Struktur Bangunan Berdasarkan Spektra Gempa Indonesia Di Pulau Sumatera Menggunakan Jaringan Saraf Tiruan Jingga, Hendra; Suryanita, Reni; Yuniarto, Enno
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Sumatera Island is one of the most active seismic area in Indonesia. The high seismic acvitity combined with mostly soft soil condition turn some location in this island into a devastating shaking area especially for highrise building. If not well designed, highrise reinforced concrete (RC) building may experience excessive deformation and endanger its occupants.Due to these facts, this study aims to predict deformation characteristics of highrise RC building under earthquake loading using artificial neural network (ANN). Prior to ANNanalysis, modal response spectrum analysis is conducted to produce building response data sets. By selecting 8 capital cities and 3 other cities in Sumatera Island as seismic location,1080 data sets are generated for ANN training and 405 data sets for testing. The ANN analysis uses 3 layers: input layer, hidden layer, and output layer. Building geometry, soilcondition, and seismic load are selected as input parameters, while story-drift, velocity, and acceleration are selected as output parameters. After 6000 iterations at training process,average mean-squared errors (MSE) of 3x10-4 and 4x10-4 are achieved for training and testing process, respectively. The calculated R2 is ranging from 83% to 95% which isadequately high for prediction rate. This shows that ANN is a very promising tool to predict story-drift, velocity, and acceleration of highrise RC building under earthquake loading.Keywords: artificial neural network (ANN), Sumatera Island, modal response spectrum analysis, structural response
Pengaruh Bentuk Dan Dimensi Tapak Pondasi Terhadap Daya Dukung Pondasi Dangkal Akibat Beban Aksial Pada Tanah Pasir Lingga Panji Subrata; S A Nugroho; Ferry ' Fatnanta
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The load distribution of shallow foundation spread out along the width of the foundation. Ultimate bearing capacity is defined as the maximum load that can be supported by the footing. Some form of shallow foundation were square, rectangular and circular shapes were they made to analyze the influence of the foundation over the same area of the shallow foundation bearing capacity due to axial loads on sandy soil. Variations foundation area of 100 cm2, 150 cm2 and 200 cm2. In the same area, the square shape can withstand greater load than in rectangular and circular shapes. Addition area will make 50-100% in weight-bearing capacity increased from 102,016 to 157,661% for squares, 135,751 to 228,497% for the rectangle and circle 187,413 to 341.259%. There are differences in the results of observation and empirical formula. Shape factors of squares and circles according to Mayerhof, Vesic and Hansen are the same. So, Terzaghi`s formula was similiar phenomenom with this research.Keywords : Shallow foundation, shapes, dimension, sand
Analisis Biaya Pemakaian Alat Berat Pada Paket Rekonstruksi Jalan Pematang Reba - Siberida (B) Eky Permana; Rian Trikomara; Sri Djuniati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The objectives of this research are to know how much cost needed for the use of new heavy equipment and old heavy equipment at project Pematang Reba – Siberida (B) Street Reconstruction. The pavement depth planning uses component analysis from Bina Marga Method for aggregate base course and method developed by NAASRA (National Association of Australian State Road Authorities) for concrete base course. Data needed for the analysis consist of work volume details, unit cost list, unit cost analysis, equipment replacement analysis and construction drawing. Cost analysis result shows that use new heavy equiptment need Rp.8,360,450,248 and old heavy equipment need Rp.13,522,647,465 with cost saving percentage 38.17% for old heavy equipment cost.Key words: cost analysis, work grained, heavy equipment, volume.
Perencanaan Biaya Pemeliharaan Dan Perawatan Bangunan Gedung Rumah Sakit Universitas Riau Berdasarkan Permen NO/24/PRT/M/2008 Malitha, Reonaldho; Iriana, Rian Tri Komara
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The continued development of a state is accompanied by the increase the need for health care facilities in the country. Health care facilities that exist today is the hospital. Thehospital is a health care institution for people with special characteristics that remain able to improve the quality and service more affordable for the people to manifest the health status of the highest. Maintenance of the building is very important and necessary after the building was completed and used. According to the regulation of the Minister of Public Works No. 24/PRT/M/2008 on Guidelines for Maintenance and Building Maintenance, building maintenance aims to be the realization of the building according to the function set andwhich meets the technical requirements: salvation, health, comfort and ease as well as environmental sustainability. This research was conducted by estimated price forecast(Approximate Estimate) that uses the highest unit price of the average per-m2 storey building to building accurate as a guide. Based on the analysis using approximate estimate method, the result is the percentage of damage that is equal to 0.01015%. While the cost of repair needed is Rp. 3,846,924.687. So it can be categorized damage RSUR building is still in the level of minor damage (<35%). As for the cost of maintenance per year is Rp.2,540,631,517.33 which is expected to increase each year.Keyword : maintenance of building, the university hospital in Riau.
Studi Kelayakan Investasi Pembangunan Upstream Infrastructure Air Bersih Pdam Kota Pekanbaru Tahun 2015 - 2035 Ito Tandika; Ari Sandhyavitri; Andy Hendri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Pekanbaru city is the capital of Riau province consisting of 12 sub-district with a total population in 2013 was 1.018.750 inhabitants. Currently PDAM "Tirta Siak" of Pekanbaru City served 10% of the water demand within the city area. The PDAM production capacity was 620 liters/sec. The purpose of this study are (i) to forecast the water demand in period of 2015-2035, (ii) calculate the investments of upstream infrastructure, and (iii) analyze the upstream infrastructure financial aspects using Benefit Cost Ratio(BCR) method, Net Present Value (NPV), Internal Rate of Return (IRR), Break Even Point (BEP), Payback Period, and Sensitivity Analysis.Result of this studies are (i) Pekanbaru City water demand for 2015 approximate to 4.056 liters/second and continued to rise become 9.176 liters / sec on 2035, (ii) the upstream infrastructure investments is divided into two phases with an investment for phase 1 is Rp. 571.059.228.117 and for phase 2 is Rp.602.641.569.713, and (iii) financial aspects values are BCR 1,37; NPV Rp.900.869.707.831; IRR 15.93% ; payback period is 18 years 4 months and 3 days ; and BEP value is 515.031.471 m3 of water that must be sold.Keyword : upstream infrastructure, water demand, investments, financial aspects
Model Hidrologi Untuk Analisis Pengaruh Perubahan Tata Guna Lahan Terhadap Potensi Ketersediaan Air Di Daerah Aliran Sungai (DAS) Siak Muhammad Iqbal; Sigit Sutikno; Ari Sandhyavitri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Significant shift in the land use within Siak watershed (DAS Siak) affects to groundwater reserves. This also affected to fluctuation of the river flows. Therefore to develop a comprehensive watershed management strategies, it is required a hydrological model which is in capable to represent the hydrological cycle of the watershed. Hydrological model may use SWAT application software package. The SWAT simulations performed various scenarios for land use changes in the period of 2002, 2007, and 2012. Based on this research study, the optimal determination coefficient (R2) of SWAT output models were = 0.59, with Nash Suflicfe Efficiency (NSE) was 0.58. The determination coefficient for validation models was 0.55 and NSE was 0.48. These results have satisfied the reserach objectives as the findings coefficient were > R2 min 0.4, and >NSE 0.35. The level of ground water reserves was calculated by comparing the ratio of Qmaximum and Qminimum during the period of 2002 to 2012. It was revealed that the ratio of ground water reserves were as the following order 10,725 (2002), 6,834 (2007) and 12,951 (2012) respectively. Should the ratio value Qmaxsimum / Qminimum was bigger, the more critical ground water reserved will be. Hence, the fundamental changes in land use is Siak watershed affected to suppress the ground wateer reserve to the critical level.Keywords: Land use change, SWAT model, ground water reserve.
Stabilitas Tanah Plastisitas Rendah Dengan Semen s, Pirmadona; Muhardi, Muhardi; Kurniawandy, Alex
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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Soil is a material that serves as an support for the basis of a constuction, be it construction of buildings, bridges and roads. Each region has different soil characteristics in other regions, there have bearing capacity is good and some are bad. To overcome this, it is necessary to repair soil with stabilization method. One way of soil stabilization is with cement. In this study, the cement used are OPC cement and PCC cement. This study focuses on the effect of OPC cement content and PCC against the value of CBR and free compressive strength (UCS) of land. Soil samples tested in this study is the low plasticity clay derived from the intersection Inpress km.11 Perawang, Siak. Content variation mixture used is 5%, 10%, 15%, 20% on each of the OPC cement and PCC to do the same curing time for 14 days.The results showed that the increasing levels of mixed cement both OPC cement and cement PCC, then the value of CBR and UCS will be even greater. The maximum increase of UCS value in the soil mix with 20% OPC and 20% PCC, where the value of each are 6.2 MPa and 2.6 MPa. At levels of 10% OPC and 10% PCC, CBR value of each is 369.6% and 189.8%. This indicates that the OPC cement and PCC cement can improve the physical and mechanical properties of clay low plasticity.Keywords: Low plasticity clay, CBR, UCS, OPC, PCC
Evaluasi Kinerja Sistem Penyediaan Air Minum (SPAM) PT. Adhya Tirta Batam 2005 - 2014 Kepulauan Riau Herdiansyah Herdiansyah; Ari Sandhyavitri; Andy Hendri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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PT. Adhya Tirta Batam is the first drinking water company in Indonesia accepted a concession contract to manage and distribution of water in Batam Island at 1995-2020 and now ATB was be the best of drinking water company in Indonesia with many achievement. ATB was improve the customers service since 1995 only has 13.710 customers with 30% coverage areas and then in 2014 ATB has 227.054 customers with 99,5% coverage areas. In order ATB can give a good services, ATB need the evaluation in some performance indicators (operational, service, and human resources) from 2005 until 2014.Based on evaluated results in performance indicators ATB in 2005-2014, ATB has a good trend in every years and customers of ATB has a high satisfaction in services of ATB. ATB achievemented during 1995-2014 was confirm that Public Private Partnership (PPP) in water sector can give the good services especially from coverage areas expansion and can operated with efficient.Keywords : PT. Adhya Tirta Batam, Concession Contract, Drinking Water Company,Public Private Partnership, Customers Satisfaction.

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