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All Journal Civil Engineering Forum Teknik Sipil Jurnal Ilmiah Teknik Sipil International Journal of Science and Engineering (IJSE) MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Ilmiah Desain & Konstruksi IPTEK The Journal for Technology and Science Jurnal Teknik Sipil Jurnal Teknik Pengairan: Journal of Water Resources Engineering Semesta Teknika Teknisia Eco Rekayasa Jurnal Teknik Sipil Journal of the Civil Engineering Forum Civil Engineering Journal FROPIL (Forum Profesional Teknik Sipil) Civil and Environmental Science Journal (CIVENSE) JURNAL TEKNIK HIDRAULIK JURNAL SUMBER DAYA AIR Jurnal Geografi Lingkungan Tropik (Journal of Geography of Tropical Environments) Community Empowerment Prosiding Seminar Nasional Teknik Sipil UMS Jurnal Geografi LIngkungan Tropik (Journal of Geography of Tropical Environments) LIMNOTEK
Djoko Legono
Departemen Teknik Sipil Dan Lingkungan, Fakultas Teknik, Universitas Gadjah Mada
Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Engineering Environmental Science Public Health Social Sciences Transportation

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REHABILITASI SALURAN TARUM BARAT TERKAIT TATA RUANG WILAYAH JABODETABEK Sumiarsih, Made; Legono, Djoko; Kodoatie, Robert
Eco Rekayasa Vol. 11. No.1, Maret 2015
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

West Tarum Canal (WTC) is a canal to convey water for irrigation to the surroundings area  and for distributing raw water to Jakarta area. The total length of WTC is 69.8 miles, starting from the Curug weir to the Ciliwung River. WTC has been operated for 40 years. Recently, there has been a decline in function of this canal up to 70%. For that reason, this canal is required rehabilitation to restore it function. This paper highlights the planning and implementation of the rehabilitation work related to spatial planning of Jabodetabekpunjur.
Efek Tegangan Geser Dasar yang Terjadi pada Lapisan Pelindung Terhadap Karakteristik Kemiringan Dasar Saluran Ikhsan, Cahyono; Raharjo, Adam Pamudji; Legono, Djoko; Kironoto, Bambang Agus
Jurnal Teknik Sipil Vol 23, No 3 (2016)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1712.751 KB) | DOI: 10.5614/jts.2016.23.3.4

Abstract

Abstrak. Armouring adalah suatu proses terbentuknya lapisan pelindung (armour layer) di dasar sungai yang diawali dari pergerakan sedimen dasar (bedload) sampai terjadinya erosi permukaan dasar (eroded surface) sehingga tercapai lapisan dasar yang stabil atau kondisi equilibrium yaitu tidak ada lagi sedimen dasar (bedload) yang terangkut. Armour layer merupakan jenis gravel dengan susunan gradasi butir yang hampir seragam terletak di permukaan dasar dan menghambat gerak bedload yang melintas di atasnya. Penelitian dilakukan di laboratorium Hidraulika PS-IT UGM, menggunakan perangkat utama sediment recirculacy flume pada dinding terbuat dari plexiglass dengan dimensi panjang 10,00 m, lebar 0,60 m, tinggi 0,45 m. Kemiringan dasar saluran yaitu 1%, 1.4%, 1,8%,2,2%, dan 2,6%. Debit aliran konstan pada kapasitas 25 l/s, 30 l/s, 40 l/s dan 45 l/s. Material berupa pasir dan gravel dicampur merata, dengan 5 variasi grain size yang berbeda. Pada tiap running terdapat 2 fase kejadian yaitu fase eroded surface dan fase equilibrium. Instrumen yang digunakan pada saat running adalah digital currentmeter, point gauge, sediment traps. Pada saat proses eroded surface, struktur armour layer nampak semakin kokoh di permukaan karena tegangan geser yang dimiliki butir armour lebih besar dari tegangan geser dasar, jadi butir armour merupakan struktur butir sedimen yang memiliki critical shear stress lebih besar dari bed shear stress.Abstract. Armouring is one of the development processes of armour layer on the base of a river, started from the movement of the transported base sediment of eroded surface reaching to stabile base layer condition or equilibrium, where there is no more transported base sediment. Armour layer is a type of gravel with almost uniform composition of granule gradation in surface base position which hampers the sediment moving above it. This research was carried out at the Hydraulic Laboratory of PS-IT UGM, using the main infrastructure of sediment recirculacy flume on the wall made from plexiglass in 10.00 m length, 0.60 m width, and 0.45 m height. The base slopes were 1%, 1.4%, 1.8%, 2.2%, and 2.6%. The flow debit was constant at 25 l/s, 30 l/s, 40 l/s and 45 l/s capacities. The material consisted of sand and gravel which was evenly mixed within 5 different variations of grainsize. At each running, there were two phases of eroded surface and equilibrium. The instruments used during the running were digital current meter, point gauge, sediment traps. Within the eroded surface process, the armour layer structure looked standing out in the base surface due to the granule critical shear stress of armour that was larger than the base shear stress, thus the armour layer was the structure of sediment granule with larger critical shear stress than bed shear stress.
REHABILITASI SALURAN TARUM BARAT TERKAIT TATA RUANG WILAYAH JABODETABEK Sumiarsih, Made; Legono, Djoko; Kodoatie, Robert
Eco Rekayasa: Jurnal Teknik Sipil Vol. 11. No.1, Maret 2015
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

West Tarum Canal (WTC) is a canal to convey water for irrigation to the surroundings area  and for distributing raw water to Jakarta area. The total length of WTC is 69.8 miles, starting from the Curug weir to the Ciliwung River. WTC has been operated for 40 years. Recently, there has been a decline in function of this canal up to 70%. For that reason, this canal is required rehabilitation to restore it function. This paper highlights the planning and implementation of the rehabilitation work related to spatial planning of Jabodetabekpunjur.
KAJIAN PENANGANAN BANJIR KALI CILIWUNG DKI JAKARTA DITINJAU DARI ASPEK HIDRO-EKONOMI (STUDI KASUS PADA RUAS CAWANG – PINTU AIR MANGGARAI) Waluyadi, Heriantono; Jayadi, Rachmad; Legono, Djoko
Civil Engineering Forum Teknik Sipil Vol 17, No 3 (2007): SEPTEMBER 2007
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

Every year in a rainy season, flood inundates several areas along Ciliwung River, especially in the Cawang – Manggarai reach. Flood in this reach is caused by land use changing in upstream area and narrower the river width in the downstream area. Several planning will be implemented to reduce the flood, which are normalization with widening river, revetment and dike construction also diversion channel from Ciliwung River to East Banjir Kanal. To determine the benefit of every flood control structure the integrated and comprehensive considerations is required. The study of performance of flood management planning with hydro-economy approach that considers hydrologic, hydraulic and economic aspect is conducted in this study. The aim of this study is to determine the benefit of every flood control structure. Before determining the benefit of flood control structure, the expected annual damage must be calculated, the calculation is based on discharge-probability of exceedence curve, discharge-stage curve and stage-damage curve. The relation from above three curves will be needed for damage-probability of exceedence curve. As a result from this curve the expected annual damage and the benefit of flood control structure can be determined. The results of analysis are that the benefit of flood control structure for normalization, diversion channel with 2,5 m in width gate, diversion channel with 3,0 m in width gate and diversion channel with 3,5 m in width gate are Rp. 20 billion, Rp. 16.1 billion, Rp. 18.9 billion and Rp. 20.1 billion respectively.
PENGELOLAAN SEDIMEN KALI GENDOL PASCA ERUPSI MERAPI JUNI 2006 Rahmat, Ali; Legono, Djoko; Kusumosubroto, Haryono
Civil Engineering Forum Teknik Sipil Vol 18, No 2 (2008): MEI 2008
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

The Gendol River, with its catchment area of 66 km2 and the river length of about 22 km, originates from the south east of Mount Merapi. Nineteen sabo dams have been built in order to anticipate and control sediment disaster. The most upstream dam is Kaliadem (+1.100 msl) and the most downstream dam is consolidation dam of GE-C0 (+163 msl). Sand mining occurs at several points along the river and cause environmental damage. In order to conserve environment and to maintain sediment balance a proper sediment management is required. The research is conducted based on sediment balance. The analysis of transportable sediment volume (VS) is conducted using empirical formula of Takahashi (1991) and Mizuyama (1977). Over flow sediment volume (VE) was analyzed using empirical equation of Shimoda (1995). Sediment balance was analyzed based on maximum daily rainfall (R24) with 25 years return period. The result of the study shows that the sabo system in Gendol River effectively works to control lahar flow. As a conclusion, the existing sabo dams are able to maintain sediment balance in Gendol River. The possible amount of sand mining is estimated about 1.253.422 m3 and the allowable daily sand mining volume is estimated about 836 m3 per day.
MITIGASI BENCANA ALIRAN DEBRIS SUNGAI BELANTING SECARA NON STRUKTURAL DESA BELANTING KECAMATAN SAMBELIA KABUPATEN LOMBOK TIMUR – NUSA TENGGARA BARAT Legiarto, Ahad; Legono, Djoko; Haryono, Haryono
Civil Engineering Forum Teknik Sipil Vol 18, No 3 (2008): SEPTEMBER 2008
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

Belanting village, situated in the foot of Rinjani mountain range and crossed over by Belanting River, is a fast-growing village. Almost all of its inhabitants are migrants who came there on their own support. On January 21, 2006, a disaster strucked: debris flow came, taking people’s lives and creating havoc to local infrastructures. One of the difficulties in the area is that the lack of non-structural disaster mitigation. At this rate, a study is required concerning the awareness of local inhabitants of the threat posed by debris flow hazard. The objective of the study is to identify the level of local people’s understanding on debris flow disaster, to be functioned as determining basis for disaster management pattern by non-structural mitigation. Data were collected from questionnaires and interviews for 80 respondents. The resulting questionnaire data were then analyzed using SPSS (Statistic Pocket for Social Science). Result of the analysis indicates that 52.5 per cent of respondents have not understood the threat of disaster. In the meantime, the interviews indicate that religious leaders (Tuan Guru) hold high social status. Based on the result of the analysis and interviews, there is a need for a strategy in non-structural mitigation program and, as far as the study is concerned, socialization during public religious learning regarded as more effective and efficient efforts.
KAJIAN PENGELOLAAN AIR IRIGASI BENDUNG PIJENAN Umar, Fauzan; Legono, Djoko; Nurrochmad, Fatchan
Civil Engineering Forum Teknik Sipil Vol 17, No 2 (2007): MEI 2007
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

Bantul Regency is about 506.85 km2 consists of 16,440 ha paddy fields and 34,245 ha upland fields. The Pijenan weir is one of weirs located in Bedog river in Bantul Regency. The weir provides irrigation water for Jigutan command area (Pijenan Upstream) of 2.074 ha. Kebonongan command area was previously irrigated from Kamijoro free intake in Progo River. The Kamijoro free intake did not properly function properly due to the sediment deposited in 1969. This condition requires supply taken from Pijenan weir. Irrigation water supply taken to Kebonangan command area can be carried out if irrigation water to Jigutan command area has been optimum. Optimally utilized irrigation water for Jigutan command area is necessary based on the crop pattern and crop variety in order to maximize the farmers’ profit. Based on the restitution of irrigation management policy, farmers free to decide which crop variety will be cultivated in accordance to paddy-paddy-palawija pattern. Paddy as the main crop and palawija (corns, beans, peanuts, onion, and chilly) can be cultivated anytime in order to gain the maximum profit based on the available water in Jigutan command area. The optimization analysis of irrigation water allocation for Jigutan command area was performed using the linear program. Water allocation for Jigutan command area of 100% and 50% of available water resulted in optimum cultivation area of 822.88 ha with profit of Rp 7.688.517.507,00 and 612.88 ha with profit of Rp 6.743.877.335,00. The crop intensity with water allocation of 100% and 50% was 278% (197% paddy and 81% palawija) and 207.05% (114.05 paddy and 93% palawija), respectively. These results described that the optimum area of paddy crop cultivation is significantly sensitive to irrigation water allocation compared to the palawija market price. This explains why the profit obtained by the farmers is dependent from the palawija variety. Results of the optimization of irrigation water allocation of 100% and 50% of the available water to Jigutan command area provides annual supply to Kebonongan command area for 155.233.586 m3 and 75.316.444 m3, respectively.
Sediment Bypass Modelling of Volcanic Rivers (A Case Study: Boyong River, Merapi Mount, Indonesia) Legono, Djoko
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 14, Nomor 2, Edisi XXXV, JUNI 2006
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (314.151 KB) | DOI: 10.14710/mkts.v14i2.3941

Abstract

Sedimen yang diangkut oleh sungai-sungai yang berasal dari gunung berapi sering mempunyai jumlah yang sangat banyak sehingga dapat mengundang permasalahan berupa daya rusak yang ditimbulkan ataupun bahkan dampak negatif lainnya. Penanggulangan yang telah ditempuh selama ini adalah dengan cara membangun bangunan pengendali sediment atau bangunan sabo yang ditujukan untuk mengurangi besarnya daya perusak tersebut dengan cara menahan laju aliran sediment yang mengalir ke hilir. Dalam hal suplai sedimen dari gunung berapi tersebut relative besar maka kehadiran bangunan sabo terlihat nyata manfaatnya. Namun pada saat dimana suplai sedimen berkurang, maka kehadiran bangunan sabo sering dinilai sebagai penyebab utama terjadinya degradasai dasar sungai di ruas-ruas sungai sebelah hilir bangunan sabo. Paper ini membahas hasil studi tentang efektivitas suatu bangunan pengalihan sedimen (sediment bypass), dalam rangka mengurangi besarnya suplai sedimen yang masuk pada suatu sungai,  yang kemudian dialihkan pada sungai yang lain. Studi dilakukan dengan mengambil kasus Kali Boyong dan Kali Kuning yang berhulu di puncak Gunung Merapi, Daerah Istimewa Yogyakarta. Teori pendekatan imbangan sedimen diaplikasikan pada suatu geometri bangunan pengalihan, yang selanjutnya diperbandingkan dengan hasil pengujian model fisik. Hasil studi menunjukkan bahwa aplikasi persamaan imbangan air (konservasi massa) pada bangunan pengalihan sedimen mempunyai nilai yang mendekati dengan hasil yang diperoleh dari pengujian model fisik. Hasil studi dapat digunakan untuk menentukan geometri yang sesuai dengan rencana penetapan jumlah pengalihan sedimen dari Kali Boyong ke Kali Kuning.Kata kunci: bangunan pengalihan sedimen, daya perusak, imbangan sedimenPermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/3941[How to cite: Legono, D., 2006, Sediment Bypass Modelling of Volcanic Rivers (A Case Study: Boyong River, Merapi Mount, Indonesia), Jurnal Media Komunikasi Teknik Sipil, Volume 14, Nomor 2, pp. 142-149]
Penerapan Optimasi Parameter pada Metode Exponential Smoothing untuk Perkiraan Debit Santosa, Budi; Suharyanto, Suharyanto; Legono, Djoko
MEDIA KOMUNIKASI TEKNIK SIPIL Tahun 18, Nomor 1, PEBRUARI 2010
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2378.929 KB) | DOI: 10.14710/mkts.v18i1.7855

Abstract

Exponetial smoothing is a technique that is very easy to apply and very effective as forecasting tool. However it requires the estimation of a parameter in order to get good acceptable result. The paper present the optimization is performed by using LINGO 11. The Resulted parameter gives predicted values closestto the observed data, and produces very good prediction as indicated in the MAE and MSE values better than other methods. Keywords : Discharge prediction, Parameter optimization, Exponential smoothing   Abstrak   Exponential smoothing adalah suatu metode yang sangat mudah untuk diterapkan dan sangat efektif dalam peramalan. Akan tetapi, penerapan metode Exponential smoothing ini memerlukan perkiraan parameter smoothing yang tepat. Dalam paper ini disajikan teknik optimasi parameter untuk memperkirakan parameter smoothing yang menghasilkan error yang minimum. Dalam optimasi yang digunakan LINGO 11. Parameter yang dihasilkan memberikan hasil prediksi yang paling dekat dengan data observasi , serta memberikan hasil yang lebih baik sebagaimana ditunjukkan dengan nilai MAE dan MSE dibanding dengan metode lain. Kata-kata Kunci : Perkiraan debit, Optimasi parameter, Exponential smoothing
Potensi wilayah terdampak keruntuhan Bendungan Matenggeng di Sungai Cijolang Utomo, Bagus Prio; Rahardjo, Adam Pamudji; Legono, Djoko
Journal of Geography of Tropical Environments Vol 3, No 1 (2019): February
Publisher : Open Journal System

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1229.363 KB) | DOI: 10.7454/jglitrop.v3i1.66

Abstract

Abstrak. Bendungan Matenggeng yang rencana akan dibangun di Sungai Cijolang merupakan bendungan multifungsi yang memiliki banyak manfaat bagi masyarakat diantaranya untuk mengairi lahan irigasi, air baku, pengendalian banjir, pembangkit tenaga listrik, dan pariwisata. Selain memiliki banyak manfaat, pembangunan bendungan juga menyimpan potensi bahaya yang sangat tinggi. Salah satu potensi bahaya yang dapat terjadi adalah keruntuhan bendungan yang diakibatkan adanya rekahan karena limpasan air pada puncak bendungan (overtopping) ataupun rekahan karena adanya rembesan di tubuh bendung (piping). Keruntuhan Bendungan akan menimbulkan banjir bandang yang sangat besar sehingga dapat menyebabkan timbulnya korban jiwa dan kerusakan harta benda. Dengan menggunakan program HEC-RAS 5.0.3, didapatkan hasil bahwa pada skenario keruntuhan overtopping, dimensi pelimpah Bendungan Matenggeng masih mampu untuk melewatkan debit maksimum (QPMF) sebesar 9.067 m3/s sehingga air tidak sampai melimpas ke puncak bendungan. Pada skenario keruntuhan piping, diperkirakan luas genangan mencapai 17.568 ha yang akan menggenangi 92 desa, 416 km jalan, dan 169 fasilitas umum.  Lebih dari separuh luas wilayah yang tergenang masuk kategori bahaya banjir tinggi hingga ekstrim dengan lahan sawah merupakan wilayah yang paling banyak masuk dalam kategori tersebut. Kata kunci: genangan, kategori bahaya banjir, bendungan.DOI: http://dx.doi.org/10.7454/jglitrop.v3i1.66
Co-Authors Adam Pamudji Rahardjo Adam Pamudji Rahardjo Adam Pamudji Rahardjo Adam Pamudji Raharjo Agatha Padma Laksitaningtyas Agatha Padma Laksitaningtyas Agatha Padma Laksitaningtyas, Agatha Padma Ahad Legiarto Ali Rahmat Ani Hairani Ani Hairani Asril Zevri Bambang Agus Kironoto Bambang Agus Kironoto Bambang Triatmodjo Bambang Yulistiyanto Bambang Yulistiyanto Bambang Yulistiyanto Bambang Yulistiyanto Basuki Widodo Bella Koes Paulina Cantik Budi Santosa Budi Santosa Budi Wignyosukarto Cahyono Ikhsan Candra Dian Lukita Tauhid Cantik, Bella Koes Paulina Davianto Frangky B. Welkis Denik Sri Krisnayanti Dewi Ayu Sofia Dyah Ari Wulandari Eka Laily Ramadhani Elenora Gita Alamanda Sapan Endita Prima Ari Pratiwi Fatchan Nurrochmad Fauziyah, Risky Fery Moun Hepy Fitriana, Indri Rahmandhani Hanny Hafiar Haryono Haryono Haryono Kusumosubroto Heriantono Waluyadi Ikhsan, Cahyono Istiarto Istiarto Istiarto Istiarto Istiqomah, Nurul Alvia John H. Frans John Hendrik Frans Joko Sujono Kazuhiko Otani Kironoto, Bambang Agus Kisindi Nur Afifah Made Sumiarsih Made Sumiarsih Misdiyanto Misdiyanto Miskar Maini Nadjadji Anwar Ni Made Sumiarsih Ni Nyoman Nepi Marleni Nur Ariva Sabila Nur Ikawati Rachmad Jayadi Radianta Triadmadja Rahardjo, Adam Pamudji Rahardjo, Adam Pramudji Raharjo, Adam Pamudji Ramon Putra Robert J. Kodoatie Robert Kodoatie Robert Kodoatie, Robert Roby Hambali Seran, Yustinus A. Subagyo Pramumijoyo Suharyanto Suharyanto Sumiadi, Sumiadi Sunjoto Sunjoto Suseno Darsono Suseno Darsono SYAHRANI SYAHRANI Teuku Faisal Fathani Umar Fauzan Utomo, Bagus Prio Wilhelmus Bunganaen Wilhelmus Bunganaen Yustinus Akito Seran