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All Journal Jurnal Ilmiah Elektronik Infrastruktur Teknik Sipil Jurnal Ilmiah Teknik Sipil Jurnal Spektran Majalah Ilmiah Teknologi Elektro Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) International Journal of Engineering and Emerging Technology Majalah Ilmiah Teknologi Elektro
Ida Ayu Rai Widhiawati
Program Studi Teknik Sipil, Universitas Udayana, Bali
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Mechanical Engineering

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ANALISIS PERENCANAAN PERSEDIAAN MATERIAL PROYEK DENGAN METODE MATERIAL REQUIREMENT PLANNING (MRP) Ida Ayu Rai Widhiawati
Jurnal Ilmiah Teknik Sipil Vol 26 No 1 (2022): Jurnal Ilmiah Teknik Sipil, Vol. 26 No. 1, Januari 2022
Publisher : Department of Civil Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2022.v26.i01.p09

Abstract

Kekosongan persediaan material pada saat pelaksanaan proyek dapat mengakibatkan penyelesaian suatu pekerjaan menjadi terhambat sehingga akan mempengaruhi total waktu pelaksanaan serta biaya proyek. Apabila persediaan terlalu banyak maka akan membutuhkan ruang penyimpanan dan terjadi penyusutan yang akan berdampak meningkatkan biaya. Untuk menghindari hal tersebut maka perlu dibuat suatu perencanaan persediaan material yang efektif dan efisien dengan mempergunakan metode Material Requirement Planning (MRP). Pada penelitian ini objek yang diambil adalah proyek pembangunan Gedung G RSUD Mangusada. Metode MRP tersusun dari 4 langkah mendasar yaitu explosion, netting, lotting, dan offsetting. Pada bagian lotting digunakan 4 teknik lot size yaitu teknik Lot for Lot (L4L), Economic Order Quantity (EOQ), Period Order Quantity (POQ), dan Part Period Balancing (PPB). Hasil analisa menunjukkan bahwa lot sizing dengan biaya total persediaan minimum adalah teknik PPB. Biaya persediaan minimum pada beberapa jenis material lainnya juga diketahui dari teknik POQ yaitu material floordeck 0,75 mm, besi tulangan Ø10, besi tulangan D10, besi tulangan D13, besi besi tulangan D22, dan wiremesh M10. Total dari biaya persediaan minimum untuk material plywood 9 mm Rp. 287.881.419,84; kayu meranti 5/7 Rp. 751.779.089; kayu meranti 6/12 Rp. 322.666.416; besi tulangan Ø10 Rp.439.697.676; besi tulangan D10 Rp. 7.331.078; besi tulangan D13 Rp.9.064.629; besi tulangan D16 Rp. 161.894.134; besi tulangan D19 Rp. 398.662.264; besi tulangan D22 Rp. 331.879.350; floordeck 0,75 mm Rp. 178.601.663; wiremesh M10 Rp. 234.037.572; wiremesh M8 Rp. 351.353.969; beton ready mix K-300 Rp. 1.412.180.000; beton ready mix K-250 Rp. 37.267.500; dan scaffolding Rp. 480.000.000.
Assessment of Surface Water Quality Status Using the Pollution Index Method in Tukad Badung River Kadek Diana Harmayani; Ni Made Pertiwi Jaya; Ida Ayu Rai Widhiawati; I Gede Andy Andika Parahita; Ngakan Gede Agung Khrisna Wiryananda; Ni Nyoman Dewi Supriyani; Daniel Rizal Mahendra; I Gusti Agung Gede Wiranata Baskhara; Debora Sofia Fransiska Hutagalung
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 1 (2023): March 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i1.175-185

Abstract

This research proposes to find out the present state of the water's purity in Tukad Badung through an examination of the Pollution Index (PI) adopted from the methodology presented by the Water Quality Index (WQI), which was presented by the Indonesian Ministry of Environment. A series of water samples were taken at three river flow points in the Denpasar City area, representing the upstream, middle, and downstream areas. The water quality parameters were determined based on the characteristics of domestic wastewater pollutant sources that are identified in watershed areas. In accordance with Regulation 22 of the Government of 2021 concerning quality standards for river water used for drinking water, the average concentrations of Total Suspended Solid (TSS), Ammonia, Biological Oxygen Demand (BOD), and Chemical Oxygen Demand (COD) parameters have exceeded quality standards. Meanwhile, the oil and grease parameter, as well as detergents, still meet quality standards. The PI at three monitoring points was obtained at 2.41 – 4.27, categorized as lightly polluted. In the future, efforts to deal with water pollution are critical to meet the downstream water quality standards used as drinking water.
ANALISIS KELAYAKAN PROYEK REVITALISASI PASAR UBUD Widhiawati, Ida Ayu Rai; Sanjaya, I Putu Ari; Widiadnyana, Putu Egges
Jurnal Ilmiah Teknik Sipil Vol 27 No 2 (2023): Jurnal Ilmiah Teknik Sipil, Vol. 27 No. 2, September 2023
Publisher : Department of Civil Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2023.v27.i02.p02

Abstract

Ubud Market is a famous traditional market for its Balinese art and crafts. The poor facilities of Ubud Market and the fire that occurred on March 24 2016 which scorched block A of Ubud Market were the reasons for the revitalization. Revitalization is for the physical improvement of the market. So people are interested again in shopping at traditional markets considering the benefits provided by traditional markets. The purpose of this study is to determine the feasibility of the investment related to the Ubud Market revitalization project. It was analyzed by technical, financial, and economic aspects. Analysis of technical aspects obtained a building height of 10.12 m > 15 m (feasible), KDB of 74% > 60% (not feasible), KLB of 1.88 <2.4 (feasible), KDH of 22% > 20% (feasible), the technical requirements of SNI 8152:2021 about People's Markets out of 34 requirements there was 32 points have fulfilled the requirements. Analysis of the financial aspect to determine the comparison between the benefits and costs of this project. From the analysis, the NPV results are - Rp. 89.904.582.521,18 < 0 (not feasible). The BCR value is 0.166 < 1 (not feasible). IRR value < MARR (not feasible). PBP value was 35 years 1.7 months > 20 years (not feasible). The results from the project's sensitivity analysis will be feasible when revenue increases by 550%. Analysis of economic aspects obtained ENPV results of Rp. 465.097.854.283,64 > 0 (feasible), BCR of 5.3 > 1 (feasible). EIRR 62.40% > 12% of MARR (feasible).
ANALISIS FAKTOR-FAKTOR PENYEBAB KETERLAMBATAN PELAKSANAAN PROYEK KONSTRUKSI I.A. Rai Widhiawati
Jurnal Teknologi Elektro Vol 8 No 2 (2009): (July - December) Majalah Ilmiah Teknologi Elektro
Publisher : Program Studi Magister Teknik Elektro Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pelaksanaan proyek konstruksi umumnya mempunyai rencana dan jadwal . Pembuatan rencana proyek mengacu  pada perkiraan saat rencana pembangunan dibuat. Masalah dapat timbul apabila ada ketidaksesuaian antara rencana dengan pelaksanaannya. Dampaknya adalah keterlambatan pelaksanaan dan meningkatnya biaya. Penelitian ini bertujuan untuk mengetahui penyebab utama dari faktor-faktor penyebab keterlambatan. Kuesioner didistribusikan kepada kontraktor yang berada di Kotamadya Denpasar dan terdaftar sebagai anggota GAPENSI Bali. Dari 216 kontraktor Gred 2-7 di Kotamadya Denpasar, diambil sampel 56 dengan menggunakan metode Stratified Proportionate Sampling. Metode analisis data yang digunakan adalah Uji Statistik Non Parametrik dengan analisis Kendall W menggunakan program SPSS 14.0 for Windows. Menurut Andi et al. (2003) dan Proboyo (1999), faktor-faktor keterlambatan dikelompokkan menjadi 10 faktor, selanjutnya dipaparkan dalam kuesioner. Sebagai responden adalah Project Manager, Site Manager, dan Pelaksana Lapangan pada masing-masing kontraktor. Dari 168 responden yang turut berpartisipasi, dapat disimpulkan bahwa faktor tenaga kerja mempunyai tingkat kesepakatan/keselarasan yang paling dominan. Penyebab utama adalah keahlian tenaga kerja. Dapat ditunjukkan dengan nilai statistik hitung > statistik tabel (242.260 >12.592) dan probabilitas < 0.05 (0.00 < 0.05), Ho ditolak berarti ada keselarasan diantara  responden tentang pengaruh faktor keterlambatan yang mempengaruhi. Serta nilai W sebesar 0.241 berada diantara 0.20-0.399, berarti tingkat keselarasan antara responden adalah rendah.
Determining the Suitable Location of Constructed Wetland for the Polluted River Water Treatment Based on Analytical Hierarchy Process and Geographic Information System Analysis Mahendra, Daniel Rizal; Harmayani, Kadek Diana; Jaya, Ni Made Pertiwi; Widhiawati, Ida Ayu Rai; Bhaskara, I Gusti Agung Gede Wiranata; Supriyani, Nyoman Dewi; Hutagalung, Debora Sofia Fransiska; Nagai, Masahiko
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 14 No 4 (2024): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.14.4.836

Abstract

The Tukad Badung River is a vital raw water source in Denpasar City and Badung Regency. Concerning the water pollution of the river, water treatment is necessary to manage the water quality. Constructed wetlands are a water treatment technology used for water purification. In this regard, information is essential regarding the appropriate location for the placement of the constructed wetland based on criteria related to the water treatment plant. The research was conducted to determine the suitability level of water treatment locations in the watershed using the Analytic Hierarchy Process method in integration with a Geographic Information System. The Geographic Information System analysis included overlaying steps of the processed and classified data from each criterion: land use, slope, and water pollution index. The Analytic Hierarchy Process method was carried out to obtain the weight of each criterion down to the sub-criteria, which were compiled through interviews with three informants from academic, government, and community representatives. Weight calculations were performed using Expert Choice 11 software to obtain weight values with a consistency ratio of < 0.1. Geographic Information System analysis using the Analytic Hierarchy Process method produces three suitable land types according to the level of suitability for water treatment locations, with constructed wetlands located in the upstream, middle, and downstream parts of the river. Information regarding suitable land is useful for planning the technical design of water treatment plants with constructed wetlands.
Co-Authors A. A. G. A. Yana A.A. Asmara A.A. Bayu Maha Kesuma Putra Anak Agung Wiranata Ariany Frederika Bhaskara, I Gusti Agung Gede Wiranata Daniel Rizal Mahendra Debora Sofia Fransiska Hutagalung Dhian C. Nur Astina G.N.P Suwandira Gd. Astawa Diputra Gede Astawa Diputra Gede Wira Hadinata Hutagalung, Debora Sofia Fransiska I Dewa Gede Marsta Laksmana I Gede Andy Andika Parahita I Gede Putra Pradipta I Gede Putu Joni I Gusti Agung Adnyana Putera I Gusti Agung Gede Wiranata Baskhara I Komang Trisna Satria Pramartha I Made Agus Ariawan I Made Dwi Bhaskara Nugraha I Nyoman Yudha Astana I Putu Indra Sanjaya I Putu Yudha Wirawan Ida Bagus Rai Adnyana Kadek Diana Harmayani Kadek Diana Harmayani Karina Renardi Made Arya Wira Santosa Mahendra, Daniel Rizal Mayun Nadiasa Nagai, Masahiko Ngk. Gd. A. Khrisna Wiryananda Ni Luh Ayu Indrayani Ni Made Pertiwi Jaya Ni Nyoman Dewi Supriyani Ni Nyoman Pujianiki Okta Arita Dewi Putu Gede Benny Artha Retno Retno Sanjaya, I Putu Ari Supriyani, Nyoman Dewi Widiadnyana, Putu Egges Yenni Ciawi