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All Journal Jurnal Ilmiah Telaah Manajemen Jurnal Ilmiah Desain & Konstruksi JURNAL HUTAN LESTARI Jurnal Teknologi Informasi Komunikasi Pendidikan Jurnal Teknik Sipil International Journal of Supply Chain Management JIIP (Jurnal Ilmiah Ilmu Pendidikan)
JOKO NUGROHO
Kelompok Keahlian Sumber Daya Air Fakultas Teknik Sipil dan Lingkungan Institut Teknologi Bandung Jl. Ganesa No.10 Bandung 40132.
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Journal : Jurnal Teknik Sipil

 1 
Kajian Peran Serta Petani Terhadap Penyesuaian Manajemen Irigasi untuk Usaha Tani Padi Metode SRI (System of Rice Intensification) di Petak Tersier Daerah Irigasi Cirasea, Kabupaten Bandung, Jawa Barat Wiyono, Agung; Legowo, Sri; Nugroho, Joko; Nugroho, Christian Adi
Jurnal Teknik Sipil Vol 19, No 1 (2012)
Publisher : Institut Teknologi Bandung

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Abstract

Abstrak. Budidaya dan penerapan metode SRI (System of Rice Intensification) sifatnya sangat kompleks, dengan adanya teknologi pertanian yang terkait dengan aspek sosial-budaya masyarakat petani dan pengemban kebijakan, lambat laun akan mendorong terjadinya perubahan pada manajemen irigasi. Tujuan dari penelitian ini adalah meneliti seberapa besar pengaruh dari peran serta petani dalam upaya menyesuaikan manajemen irigasi untuk usaha tani padi metoda SRI di daerah irigasi Cirasea, Kabupaten Bandung, Jawa Barat. Dengan responden 88 orang kelompok tani SRI dan 14 orang dari instansi, diperoleh hasil penelitian: variabel kelembagaan (X1), Irigasi(X2), dan Partisipasi Petani dan Sistem Pendukung(X3), secara bersama-sama berpengaruh terhadap Penyesuaian Manajemen Irigasi SRI (Y) nilai korelasi 0,672. (Hubungan kuat), dimana persamaan regresinya adalah Y= 6,957 + 0,239 X1 - 0,327 X2 + 0,604 X3. Partisipasi Petani dan Sistem Pendukung (X3) merupakan faktor dominan yang paling berperan dalam memprediksi tingkat penyesuaian manajemen irigasi SRI dengan nilai koefisien regresi 0,604. Dari sisi institusi didapatkan Pilihan untuk Berpartisipasi (X1), Tekanan Sosial Dalam Bertingkah Laku (X2) dan Kontrol dalam Tingkah Laku (X3) secara bersama-sama berpengaruh terhadap Itensi (Y) dengan nilai korelasi 0,783 (Hubungan kuat), dimana persamaan regresinya adalah Y= 0,854 - 0,286 X1 + 0,558 X2 + 0,693 X3. Variabel Kontrol dalam Tingkah Laku (X3)merupakan faktor dominan yang paling berperan dalam memprediksi variabel Itensi (Y) dengan nilai koefisien regresi0,693.Abstract. Cultivation and application of the SRI (System of Rice Intensification) method are very complex, with the presence of agriculture technology associated with socio-cultural aspects of farming communities and policy holders, eventually leading to changes in irrigation management. The purpose of this study was to test how much the influence of farmers participation in irrigation management efforts to adjust the SRI method of rice farming in irrigated areas Cirasea, Bandung regency, West Java. With 88 respondents from SRI farmer groups and 14 respondents from the agency, they obtained the results of the research: institutional variables (X1), Irrigation (X2), and Farmer Participation and Supports System (X3). They affect SRI Irrigation Management Adjustment (Y)  values correlation of 0.672 (Strong relationship) with the regression equation Y= 6,957 + 0,239 X1 - 0,327 X2 + 0,604. Farmer Participation and Support System (X3) are the most dominant factors play a role in predicting the level of irrigation management SRI adjustments to the value of regression coefficient of 0.604. In the case of agencies found that the Option To Participate (X1), Social Pressure In Practice Acting (X2) and Control of Behavior (X3) jointly affect Itensi (Y) with a 0.783 correlation value (strong ties). With the regression equation Y= 0,854 - 0,286 X1 + 0,558 X2 + 0,693, the unknown variable in the Control of Behavior (X3) is the most dominant factors play a role in predicting Itensi variable (Y) with a regression coefficient value of 0.693.
Perbandingan Gerusan Lokal yang Terjadi di Sekitar Abutment Dinding Vertikal Tanpa Sayap dan dengan Sayap pada Saluran Lurus, Tikungan 90°, dan 180° (Kajian Laboratorium) Wiyono, Agung; Nugroho, Joko; Widyaningtias, Widyaningtias; Zaidun, Eka Risma
Jurnal Teknik Sipil Vol 18, No 1 (2011)
Publisher : Institut Teknologi Bandung

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Abstract

Abstrak. Fenomena kerusakan jembatan akibat gerusan pada pondasi pier atau abutment sulit diamati secara langsung. Salah satu metode untuk menyederhanakan adalah dengan pemodelan fisik di laboratorium. Tujuan penulisan jurnal ini adalah membandingkan gerusan yang terjadi di sekitar abutment dinding vertikal tanpa sayap dan dengan sayap pada saluran lurus, tikungan 90o, dan 180o. Perbandingan difokuskan pada gerusan lokal jenis live -bed scour dan terjadinya transportasi sedimen sepanjang pengaliran debit 4, 5, 6, dan 7 liter/detik pada model saluran. Penelitian dilakukan dengan membangun model saluran terbuka dengan dinding fiberglass dan dasar saluran terbuat dari semen, saluran memiliki bagian lurus serta sudut tikungan 90° dan 180°. Hasil parameter fisik berupa kecepatan dan kedalaman gerusan, dibandingkan secara analitik dengan menggunakan Formula Laursen (1960), Froehlich (1989), dan Mellvile (1997). Hasil perbandingan menunjukkan bahwa pada abutment dinding vertikal tanpa sayap, hasil perhitungan Formula Laursen paling mendekati hasil pengamatan dengan persentase kesalahan 20,02%. Sedangkan untuk abutment dinding vertikal dengan sayap, persentase kesalahan terkecil sebesar 28,17%, dengan menggunakan Formula Froehlich (1989). Untuk abutment dinding vertikal tanpa sayap, kedalaman gerusan maksimum terjadi di sekitar hulu abutment, dan segmen tengah abutment untuk abutment dinding vertikal dengan sayap. Untuk kedua tipe abutment sedimentasi tertinggi terjadi di sebelah hilir.Abstract. The damage phenomenon of the bridge due to scour on pier foundation or abutment is difficult to observe directly. One of the methods to simplify this phenomenon is modeling in the laboratory. The purpose of this research is to compare scouring around vertical wall and vertical wing-wall abutment in straight channel, 90o, and 180o curve channel. Scouring comparison focused on the live-bed scour and the occurrence of sediment transport along the 4, 5, 6, and 7 liters / second discharge on the channel model. Results of physical parameters such as velocity and depth of scouring compared with the analytical using Laursen (1960), Froehlich (1989), and Mellvile (1997) formula. The result from each calculation will be compared with the observation data. The resultshows that maximum scouring for vertical wall and vertical wing-wall abutment occurred in upstream and middle of abutment respectively. Furthermore, sedimentation for both of types is around downstream of abutment. From the analytical comparison, Laursen’s Formula gives closer accuracy for vertical wall abutment than others formulas, with the percentage of error is about 20,02%. While, Froehlich’s Formula gives 28,17% for wing-wall abutment.
Analisis Wilayah Tergenang dan Perilaku Banjir pada Simulasi Kegagalan Bendungan Ciawi Wirustyastuko, Dandi; Nugroho, Joko
Jurnal Teknik Sipil Vol 20, No 2 (2013)
Publisher : Institut Teknologi Bandung

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Abstract

Abstrak. Paper ini menyajikan hasil analisis wilayah yang berpotensi terkena genangan banjir apabila Bendungan Ciawi mengalami kegagalan dan membuat peta daerah bahaya bencana banjir. Analisis wilayah tergenang dan perilaku banjir dalam studi ini menerapkan program ZhongXing HY-21 untuk membuat hidrograf aliran keluar dari bendungan, menganalisis tinggi genangan dan cepat rambatan banjir serta mengetahui sebaran wilayah yang terkena genangan. Selanjutnya dari parameter tersebut akan dilakukan analisis resiko genangan dengan penentuan klasifikasi resiko bencana untuk daerah hilir bendungan ditinjau dari tinggi genangan dan penduduk terkena resiko bencana. Debit outflow maksimum terjadi pada rekahan akibat keruntuhan Bendungan untuk skenario kasus piping yaitu 83690,9 m3/s (pada waktu ±0,52 jam saat proses keruntuhan). Jumlah wilayah terbesar yang terkena dampak genangan mencapai 21 Kecamatan dari 6 Kabupaten untuk skenario kasus overtopping. Klasifikasi tingkat resiko untuk daerah hilir Bendungan Ciawi secara umum termasuk dalam kategori dengan nilai 3 (Tingkat Resiko Menengah) dan kategori Daerah Bahaya Bencana 3 (tinggi genangan > 2 m). Abstract. This paper presents the area potentially affected by flood inundation in case of Ciawi Dam failure and to make a map of the flood hazard areas. Analysis of the flood inundation and its behavior in this study were done by application of the ZhongXing HY-21 program. The application of software resulted some paramteres, i.e : the outflow hydrograph through the dam, analyzing the water level, flood travel time and determining the distribution of the affected areas by inundation. Further more from these parameters will be analyzed to determine the risk of inundation by determining the downstream hazard classification in term of water level and risk recipient population. Dam failure due to piping case scenario has the largest discharge outflow which is 83690,9 m3/s (± 0.52 hours at the process of the failure). The largest number of areas affected by inundation reached 21 Sub-districts of 6 Districts to overtopping case scenario. The classification of Ciawi Dam downstream hazard generally included in the category with a value of 3 (Intermediate Risk Level) and category 3 of Disaster Hazard Areas (water level > 2 m).
Experimental Study of Energy Dissipation at Baffled Chute Spillway Nugroho, Joko
Jurnal Teknik Sipil Vol 26, No 1 (2019)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1531.397 KB) | DOI: 10.5614/jts.v26i1.11188

Abstract

Experimental observation on a model of free over flow spillway is used in this study.  Three configurations of baffle placement are used in the experiment.  The energy along the flow over the spillway were calculated based on measured flow depth and discharge during the experiment. Variations of flow depth and discharge were determined based on baffle height as a reference.  The experiments were done in a 7 meters long flume of 0.078 m wide.  The spillway model has a dimension of 17.2 cm high, with rounded crest and 1:1 downstream slope.  There is no structures placed at the downstream of spillway.  The discharge applied to the spillway model is in the range of 0.6 to 1.8 l/s.  The experimental results shows that optimum results of energy dissipation were obtained when the flow depth is equal to the height of the baffle.  Observed energy dissipations in this is in the range of 30% to 50% upon the incoming energy of the spilled flow.  It was also observed that the length of the hydraulic jumped is reduced due to the application of baffled chute.
Co-Authors Adelina Hasyim Agung Wiyono Agus Suyatna Ahmad Hidayat Akbar, Ya’ Muhammad Arsyil ARIF SUSANTO Asih Priyati Bachrun Nurdjali Bambang Purwantana Bari, Zunaidi Benito H Purwanto, Benito H Caniago, Aspizain Christian Adi Nugroho, Christian Adi Dandi Wirustyastuko, Dandi Dasapta Erwin Irawan, Dasapta Erwin Dewi, Puti Sari Eka Risma Zaidun, Eka Risma Erni Romansyah, Erni fauzi, ryo muhammad Halim, Paisal Ismail, Dingot Hamonangan Khairiansyah, Muhammdad Nursigit Bintoro nutriawani, rafika Ratna Herawatiningsih Sigit Supadmo, Sigit Siti Latifah Sofyan Zainal Solihin, Agung Sri Legowo Sri Rahayoe Surya Abdul Muttalib, Surya Abdul Toha, Toha ha Tri Widiastuti Widyaningtias Widyaningtias, Widyaningtias