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All Journal JOURNAL TEKNIK SIPIL DAN INFRASTRUKTUR JURNAL TEKNOLOGI LINGKUNGAN IPTEK The Journal for Technology and Science Jurnal Teknik Pengairan: Journal of Water Resources Engineering Jurnal Irigasi Civil and Environmental Science Journal (CIVENSE) Borneo Engineering : Jurnal Teknik Sipil
Nadjadji Anwar
Universitas Pembangunan Nasional "Veteran" Jawa Timur
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Environmental Science

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Kajian Model Fisik Pengaruh Freeboard dan Susunan Buis Beton Sebagai Pemecah Gelombang Tenggelam Ambang Rendah (Pegar) Dalam Mereduksi Gelombang Zulkarnain, Zulkarnain; Anwar, Nadjadji
Borneo Engineering : Jurnal Teknik Sipil Volume 1, Nomor 2, Desember 2017
Publisher : Jurusan Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1182.306 KB) | DOI: 10.35334/be.v1i2.600

Abstract

The Research Center and Development of Water (Puslitbang) is currently developing the Submerged Breakwater in shallow sea area (PEGAR). The author is interested to examine the material that easily obtained in the field of RCP concrete cylinder. The observation is how it to be ability in function as submerged breakwater an go green and low cost. The physical model of wave transmission test is how the response to the structure in ability to damping of wave as the breakwater function. In this research breakwater used is submerged breakwater type by using concrete cylinder (buis beton). The purpose from this research is to know how the response of breakwater structure to the waves through it, with some variation of the structure by creating a structure with three variations of the arrangement and freeboard that is the relative depth with the crest width is constant. The wave generated test in this study is using regular waves in wave flume at FTSP Civil Engineering Department of Institute Technology Ten November. From the analysis of the effect of the installation of submerged breakwater by using concrete cylinder to the wave damping value, it can be concluded that the factors that are very influential is the freeboard and the composition of concrete cylinder. Scenario A (rigid vertical massive) is capable of producing the smallest value of kt is 0.33. As for scenario B (rigid horyzontal massive) with a damping value of 0.5, while the scenario C (rigid permeable) is only able to produce kt value of 0.71. Scenario A is better than scenario B and C Because the position of arrangement of A is very good used to damp wave in small or big freeboard conditions.
PENENTUAN NILAI KONDUKTIVITAS HIDROLIK TANAH TIDAK JENUH MENGGUNAKAN UJI RESISTIVITAS DI LABORATORIUM Asmaranto, Runi; Aryani Soemitro, Ria Asih; Anwar, Nadjadji
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol 3, No 1 (2012)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1742.173 KB)

Abstract

Electrical resistivity can be used to identify geotechnical parameters such as water content, liquid limit, plastic limit and unit weight. It is known that the hydraulic conductivity values can be predicted based on soil properties, so that should be determined through resistivity laboratory test. Some researchers explained that unsaturated soil hydraulic conductivity correlated with soil-water characteristic curve (SWCC), thus the estimated values of hydraulic conductivity using a resistivity test is very important to be developed by observing the behavior of the soil.This study examines changes in hydraulic conductivity of unsaturated soil based on laboratory resistivity test. The results are compared with Gardner (1958) and Campbel (1973) empirical methods. The results show that the unsaturated soil hydraulic conductivity correlates well with the empirical methods used.Keywords: soil-water characteristic curve, hydraulic conductivity, unsaturated soil, suction
IDENTIFIKASI KELEMAHAN METODE EARNED VALUE PADA PENGUKURAN KINERJA BIAYA DAN WAKTU PROYEK KONSTRUKSI F., Fahirah; Wahyu Adi, Tri Joko; Anwar, Nadjadji
JOURNAL TEKNIK SIPIL DAN INFRASTRUKTUR Vol 3, No 2 (2013)
Publisher : Jurusan Teknik Sipil Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (272.95 KB)

Abstract

Earned Value method (EV) has several weaknesses which makes it difficult to optimally apply in the construction projects. This study aims to identify the shortcomings of Earned Value related to the project cost and time performance. Literature study was conducted from the various sources related to the EV topic. The result shows that the main weakness of Earned Value method are: EV prediction method is assumed deterministic, linear, non-dynamic and does not accommodate uncertainty factors of time and cost of construction projects.   Keywords: construction  project, time and cost performance, earned value
Analisis Kesiapan Modernisasi Irigasi pada Daerah Irigasi Kewenangan Pemerintah Provinsi di Kabupaten Mojokerto Sari, Dian Puspita; Anwar, Nadjadji; Sidharti, Theresia Sri
Jurnal Irigasi Vol 14, No 1 (2019): Jurnal Irigasi
Publisher : Balai Teknik Irigasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (552.006 KB) | DOI: 10.31028/ji.v14.i1.33-45

Abstract

In carrying out irrigation system management in the irrigation area managed by the East Java Province in Mojokerto, PU Department of Water Resources of East Java experienced some constraint, namely irrigation infrastructure had expired, less of irrigation services and there was a decrease in storage capasity. Another constraint is population growth which has led to an increase in water use needs, food needs, conversion from agricultural land to settlements and industries and critical watersheds. In an effort to overcome these constraint, in addition to the operation, maintenance and rehabilitation, a comprehensive reform is needed, both institutional, technical, managerial, and human resources, known as irrigation modernization. Before carrying out irrigation modernization activities, it is necessary to have an assessment to measure the readiness levels of an irrigation area in carrying out modernization activities. First, determine the criteria that affect the modernization of irrigation, in this case there are 5 criteria and 34 sub criteria. Criteria weights were calculated using Fuzzy Analytical Hierarchy Process method. Then, priority scale of readiness irrigation area in carrying out irrigation modernization activities was determined using Simple Additive Weighting method. From 7 irrigation area managed by the East Java Province in Mojokerto, the resulting priority scale showed that modernization of irrigation can be applied to Kromong Irrigation Area. Modernization of irrigation should be postponed and carried out after revitalization on the Irrigation Area of Mernung, Sinoman, Penewon, Candi Limo, Jatikulon and Subontoro.
APLIKASI METODE CURVE NUMBER UNTUK MEMPRESENTASIKAN HUBUNGAN CURAH HUJAN DAN ALIRAN PERMUKAAN DI DAS CILIWUNG HULU – JAWA BARAT Tikno, Sunu; Hariyanto, Teguh; Anwar, Nadjadji; Karsidi, Asep; Aldrian, Edvin
Jurnal Teknologi Lingkungan Vol. 13 No. 1 (2012)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1149.735 KB) | DOI: 10.29122/jtl.v13i1.1402

Abstract

Aliran permukaan/limpasan (run off) merupakan salah satu variabel hidrologi yang sangat penting di dalam menunjang kegiatan pengembangan sumber daya air. Metode prediksi yang handal untuk menghitung jumlah dan laju limpasan yang berasal dari permukaan tanah dan bergerak menuju sungai di suatu DAS yang tidak dilengkapi alat ukur (ungaged watershed) adalah suatu pekerjaan yang sangat sulit dan memerlukanwaktu yang banyak. Penelitian ini dilakukan di DAS Ciliwung Hulu, yang merupakan daerah penting dalam kotribusi banjir di Jakarta. Untuk mengetahaui run off  yang terjadi, digunakan data curah hujan dan debit Tahun 2007-2009. Sebagai model, untuk mengetahui run off menggunakan peta penggunaan lahan, peta jenis tanah, dan topografi. Peta-peta tersebut diolah dengan menggunakan Arcview, sehingga didapatkannilai CN. Berdasarkan analisis perhitungan, besarnya debit mendekati 50% dari tebal hujan. Kondisi ini mengindikasikan bahwa kondisi DAS Ciliwung Hulu sudah tidak mampu lagi menyerap curah hujan dengan baik. Korelasi antara hasil prediksi run off model yang menggunakan CN dengan perhitungan run off observasi cukup baik. Hal ini menunjukkan bahwa metode Curve Number cukup dapat mepresentaskan hubungancurah hujan dengan aliran permukaan (run off). kata kunci : Run off observasi, run off model, curve number AbstractRun off (surface flow) is one of the most important hydrological variable in supporting the activities of water resources development. A reliable prediction method to calculate the amount and rate of runoff from the land surface caused by the rain that falls in a watershed that is not equipped with measuring devices (un gauge watershed) is a verydifficult job and requires a lot of time. The research was conducted in the watershed Ciliwung Hulu, which is an important area in relation to the incidence of flooding in Jakarta. Curve Number (CN) method can be used to predict the amount of runoff from a watershed. This model required input of rainfall; land cover maps; soil type maps,and topography. The maps are processed using Arc View software, so we get the value of CN. In this study, we used of rainfall and discharge data 2007-2009. Based on the analysis of calculation, known that amount of surface flow approaching 50% of rainfall depth. This condition indicates that the Ciliwung Hulu watershed conditions were not ableand proper to absorb of rainfall. The correlation between the results of run-off prediction models using CN with run-off observation was quite good. This indicated that the Curve Number method could be able to represent the relationship of rainfall with surface flow (run off) and also to predict runoff key words: Run off observation, run-off model, curve number
Evaluating Error of Temporal Disaggregation from Daily into Hourly Rainfall using Heytos Model at Sampean Catchments Area Hidayah, Entin; Anwar, Nadjadji; Edijatno, Edijatno; Iriawan, Nur
IPTEK The Journal for Technology and Science Vol 21, No 1 (2010)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v21i1.25

Abstract

Developing a rainfall-runoff model sufficient to flood prediction hourly rainfall data. Lack of automatic rain gauge for high resolution rainfall in catchment area can be an obstacle for the modeling. Otherwise, the manual rain gauges may spread on all of catchments areas, providing daily rainfall. Daily rainfall disaggregation to hourly rainfall is an innovation to get higher temporal resolution of the rainfall. This paper attempts to evaluate the implementation of rainfall disaggregation model in Sampean Catchments Area using Heytos. The proposed parameter optimation use Moment Performance model that tested by calibrating it with available hourly data. The results of model indicated that only data within five months had good performance. The estimation result showed that relative error total of January, February, August, November, and December was less than one. In case of March, April, May, June, July, September, and October the model could not result respectively to generate model.
Analysis of Waikelo Port Breakwater Failure through 2D Wave Model Winarta, Bambang; Damarnegara, A. A. N Satria; Anwar, Nadjadji; Juwono, Pitojo Tri
Civil and Environmental Science Journal (CIVENSE) Vol 1, No 2 (2018)
Publisher : Fakultas Teknik UB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.civense.2018.00102.6

Abstract

Waikelo Port is located in South West Sumba of East Nusa Tenggara. The port facilities are protected by breakwater with a vertical wall construction and it was built in a relatively deep ocean at -15m of Low Water Sea Level (LWS). On 21 of January 2012, an earthquake with magnitude of 6.3 Richter scale occurred around Sumba Island and it caused cracking in the concrete wall of breakwater. Then, 4 days after on 25 st January 2012, a heavy wind of 20–23 knots generated a high wave around 4.0–5.0m in Sumba strait. These high waves caused a critical damage on the west part of the breakwater. The damage of port facilities were getting worse when a storm called Lua hit on March 2012. This study was conducted to observe the effect of the extreme event in the failure of breakwater. The result of two-dimensional (2D) wave model shows that the wave heights in the area of breakwater are varied 3.80 to 4.0m. It is quite greater than the wave design of 50 years return period (= 2.00m) which was used in breakwater design and calculation. This observable fact confirms that the failure of breakwater was caused by the continuous extreme events that exceed the design criteria
Co-Authors Asep Karsidi, Asep Damarnegara, A. A. N Satria Dian Puspita Sari Edijatno Edijatno Edvin Aldrian Entin Hidayah Fahirah F. Nur Iriawan Pitojo Tri Juwono Ria Asih Aryani Soemitro Runi Asmaranto Sidharti, Theresia Sri Sunu Tikno, Sunu Teguh Hariyanto, Teguh Tri Joko Wahyu Adi Winarta, Bambang ZULKARNAIN ZULKARNAIN