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All Journal IPTEK The Journal for Technology and Science Jurnal Aplikasi Teknik Sipil
Edijatno Edijatno
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Civil Engineering, Building, Construction & Architecture Computer Science & IT

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A Comparative Study of Water Quality Characteristics at East Java River Sri Wahyuningsih; Nadjadji Anwar; Edijatno Edijatno; Nieke Karnaningroem
IPTEK The Journal for Technology and Science Vol 21, No 4 (2010)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v21i4.91

Abstract

Water is the natural resources have the function of very importance for human life and also as authorized capital in development. Water will influence by the other component. Exploiting of water to support all human life must done with wise action to management so that not result damage at water resource. As place relocation of water hence river have the selected capacities that able to change because natural activity and antropogenik. This research was conducted in nine major rivers in East Java. The objectives of this study were: 1) Identifying the characteristics and concestration range of water quality parameter, 2) Comparison the level of pollution in rivers in East Java. The results of this study indicated that the characteristic of water quality parameter of rivers in East Java were generally physical, chemical and biological. The comparison result of water quality parameter basically showed that in general the pH was still under threshold that had been determined, that was pH from 6 to 9. In general, DO concentration ranged from 0.5 mg/l to 7 mg/l, BOD concentration ranged from 3 mg/l to 11 mg/l and the COD concentration ranged between 0.5 mg/liter to 35 mg/l.
Generating Hourly Rainfall Model using Bayesian Time Series Model (A Case Study at Sentral Station, Bondowoso) Entin Hidayah; Nur Iriawan; Nadjadji Anwar; Edijatno Edijatno
IPTEK The Journal for Technology and Science Vol 22, No 1 (2011)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v22i1.57

Abstract

Disaggregation of hourly rainfall data is very important to fulfil the input of continual rainfall-runoff model, when the availability of automatic rainfall records are limited. Continual rainfall-runoff modeling requires rainfall data in form of series of hourly. Such specification can be obtained by temporal disaggregation in single site. The paper attempts to generate single-site rainfall model based upon time series (AR1) model by adjusting and establishing dummy procedure. Estimated with Bayesian Markov Chain Monte Carlo (MCMC) the objective variable is hourly rainfall depth. Performance of model has been evaluated by comparison of history data and model prediction. The result shows that the model has a good performance for dry interval periods. The performance of the model good represented by smaller number of MAE by 0.21 respectively.
Strategi Pemeliharaan Jaringan Irigasi Daerah Irigasi Blimbing Roni Sigit Wibowo; Wasis Wardoyo; Edijatno Edijatno
Jurnal Aplikasi Teknik Sipil Vol 16, No 1 (2018)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (273.645 KB) | DOI: 10.12962/j2579-891X.v16i1.2793

Abstract

Daerah Irigasi (DI) Blimbing mengairi lahan pertanian sebesar 319 Ha. Kondisi fisikjaringan irigasi banyak mengalami kerusakan yang mengakibatkan menurunnya fungsijaringan irigasi. Sehingga diperlukan pemeliharaan untuk mengembalikan fungsi jaringanirigasi ke kondisi semula. Tujuan dari penelitian ini adalah untuk memperoleh strategipemeliharaan jaringan irigasi DI Blimbing yang optimal, dengan memperhatikan biaya.Tahap awal adalah mengidentifikasi, menilai kondisi fisik dan fungsi bangunan irigasi danmembuat urutan prioritas pemeliharaan jaringan irigasi. Kemudian menghitung Benefitand Cost untuk menilai kelayakan. Penelitian ini menggunakan Metode Linier Programmingyang terdiri dari fungsi tujuan dan kendala. Sebagai fungsi tujuan adalahmemaksimumkan nilai prioritas/nilai manfaat, sedangkan untuk fungsi kendala yaituketerbatasan biaya. Mengacu biaya sebesar Rp. 100.000.000, permodelan/optimasipemeliharaan yang dikaitkan untuk memaksimalkan nilai prioritas atau nilai manfaatdiperoleh ruas yang dapat diperbaiki sebanyak 7 ruas dengan anggaran sebesar Rp.99.998.877. Hasil optimasi dengan memaksimalkan nilai prioritas sama dengan hasiloptimasi dengan memaksimalkan nilai manfaat.
Co-Authors Entin Hidayah Fachry Abda El Rahman Nadjadji Anwar Nieke Karnaningroem Nur Iriawan Roni Sigit Wibowo Wasis Wardoyo