Garuda - Garba Rujukan Digital

KAJIAN LONCATAN HIDROLIK PADA KOLAM OLAK MODEL FISIK BENDUNGAN KRUENG SABEE KABUPATEN ACEH JAYA Muslem, Muslem; Azmeri, Azmeri; Syamsidik, Syamsidik
Jurnal Arsip Rekayasa Sipil dan Perencanaan Vol 4, No 4 (2021): Jurnal Arsip Rekayasa Sipil dan Perencanaan
Publisher : Prodi Magister Teknik Sipil Unsyiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jarsp.v4i4.24742

Hydraulic jump is a phenomenon that occurs in stilling basins from supercritical to subcritical conditions. The design of the Krueng Sabee dam aims to meet the needs of the people in the Aceh Jaya district. So this study aims to identify the behavior of hydraulic jumps that occur in energy dissipators in the form of jump height and energy dissipation to obtain an optimal design. The research method is a physical model study with an undistorted scale of 1:30. The energy dissipator used in this plan is the USBR IV stilling basin type. The discharge flowed on the physical model of the Krueng Sabee dam with return periods of Q2, Q5, Q10, Q25, Q50, Q100, and Q1000 years. Tests were carried out on 2 types of models, namely the Detail Engineering Design (DED) model series and the modified model series. In the modified model series, the addition of a 3 m high slope with a slope of 1:2, the elevation of the stilling pool was lowered to a depth of 3 m, and the addition of the length of the stilling pool was 4.8 m. The results of this study indicate that the modified series model is more optimal than the DED series model. The pattern of high jump and jump length increased against Froude numbers on the upstream jump showed a series of modified models better. The results of energy dissipation observations show that the modified model series is more competitive. The highest relative hydraulic jump ((y1-y2)/y1) that occurred in the modified model series was 19.40 (almost 3 times higher) than the highest ((y1-y2)/y1) model of the DED series model, which was 6.54. In the modified series, the farther Lj/y1 occurs the greater ∆E/y1 generated. On the other hand, there is a large decrease in relative energy dissipation (∆E/y1) with increasing relative hydraulic jump length (Lj/y1) in the DED series. The results of the analysis show a large decrease in ∆E/y1 to an increase in the ratio y1/y2 in both series of stilling basin models.

Spatial Temporal Condition of Recent Seismicity In The Northern Part of Sumatra Inna Nurana; Andrean Vesalius Hasiholan Simanjuntak; Muksin Umar; Djati Cipto Kuncoro; Syamsidik Syamsidik; Yusran Asnawi
Elkawnie: Journal of Islamic Science and Technology Vol 7, No 1 (2021)
Publisher : Universitas Islam Negeri Ar-Raniry Banda Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22373/ekw.v7i1.8797

Abstract: The condition of stress and recent seismicity in the seismic-prone area can be statistically analyzed with the Gutenberg-Richter relation (Log N = a-bM). We apply this relation to the hypocenter distribution for the period 1970-2020 with M ≥ 4 and depth ≤ 100 km in the northern part of Sumatra. Spatially, The results obtained a-values and b-values that figure a lateral heterogeneity and stress accumulation at the interface zone in the subduction system and the northern segmentation of the Seulimeum fault. In time, both zones illustrate a slow time-to-failure cycle and the seismic gap with high-stress accumulation in the specific clusters with high parameter values. The results of the spatial-temporal analysis illustrate that a low statistical parameter value usually precedes each major earthquake event.Abstrak: Kondisi stress dan seismisitas terkini di daerah rawan gempa dapat dianalisis secara statistik dengan hubungan Gutenberg-Richter (Log N = a-bM). Kami memakai hubungan ini pada distribusi hiposenter pada periode 1970 - 2020 dengan M ≥ 4 dan kedalaman ≤ 100 km di bagian utara Sumatera. Secara spasial, hasil yang diperoleh yaitu nilai-a dan nilai-b yang menggambarkan heterogenitas lateral dan akumulasi stress pada zona pertemuan di sistem subduksi dan segmentasi utara dari sesar Seulimeum. Secara waktu, kedua wilayah menggambarkan siklus time-to-failure yang lambat dan zona seismic-gap dengan akumulasi stress yang tinggi pada kluster tertentu dengan nilai parameter yang tinggi. Hasil analisis spasial temporal menggambarkan bahwa setiap kejadian gempa besar biasanya didahului dengan nilai parameter statistik yang rendah.

ASESMEN POTENSI TSUNAMI DAN KESIAPSIAGAAN MASYARAKAT PESISIR: STUDI KASUS TELUK ULEE LHEUE, ACEH BESAR Benazir Benazir; Syamsidik Syamsidik; Yunita Idris
JURNAL TEKNIK HIDRAULIK Vol 13, No 1 (2022): JURNAL TEKNIK HIDRAULIK
Publisher : Pusat Litbang Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v13i1.678

The 2004 Indian Ocean Tsunami, which devastated the coasts of Aceh and Nias, revealed that the event was a mega-hazard category. Following the disaster, a new era in the development of tsunami mitigation throughout the archipelago began. Nonetheless, given the impact of the two tsunamis that occurred at the end of 2018, achieving mitigation within 17 years poses a unique challenge and high priority. The relationship between tsunami-prone areas and community preparedness has become a crucial factor in achieving regional disaster resilience. The objective of this research is to provide a regional assessment of tsunamis risk as well as community preparedness for future tsunami. The coast of Teluk Ulee Lheue, Aceh Besar, was chosen as the location for the assessment as a role model. The research method consists of tsunami mathematical modeling considering the impact caused by the magnitude of earthquakes 8.2, 9.15, and 9.2. The Nonlinear Shallow Water Equation (NSWE) model was used in the simulation, which was discretized using the explicit leap-frog Finite Difference Method. Field activities were included not only to collect topography and land use data but also to gather information and community response. The data was provided directly from the local community through the completion of a questionnaire, with a total of 150 respondents being evaluated. The findings of this study reveal that the consequences of the tsunami inundation remain quite considerable, even for a smaller-scale earthquake than the previous 2004 event. In general, the degree of community preparedness seems to be quite high, especially in terms of tsunami awareness. An improvement in disaster emergencies is required, specifically in the household sector. However, with a high degree of community preparedness, it would be essential to carry out individual evacuations rapidly. Keywords: tsunami hydrodynamics, numerical simulation, run-up, community preparedness, environmental social

Pemanfaatan Citra Satelit Google Earth untuk Penilaian Progres Pemulihan Lahan Pasca 15 Tahun Tsunami Aceh di Kecamatan Lhoong, Aceh Besar Ismiatul Ramadhian Nur; Syamsidik Syamsidik; Saumi Syahreza
Jurnal Rekayasa Elektrika Vol 17, No 1 (2021)
Publisher : Universitas Syiah Kuala

The 2004 Indian Ocean Tsunami has changed the land cover of the affected areas. Sixteenth years after the tsunami, studies pertinent to land restoration progress are becoming crucial as one of the needs in assessing the progress of the long-term disaster recovery process. Spatio-temporal land change assessment in a disaster-affected area can be conducted using time-series satellite imagery. One of them is The Google Earth satellite image which has an adequate prior data record. Although it has a single band, the Google Earth satellite imagery has many other advantages: easy access, free of charge, and decent resolution for detailed mapping. This research aims to assess the progress of land restoration by utilizing Google Earth satellite imagery. The applied method is visual observation and on-screen digitization process by Google Earth Pro and QGIS. This study provides outcomes of the trend of land transformation after the tsunami, which shows that the rice fields and ponds have not recovered to the condition before the tsunami. Meanwhile, the length of the road and building area have exceeded the pre-tsunami time. The entire land uses show an increasing trend with varying percentages from 2010 to 2020. This research is essential to carry out as an initial assessment of the long-term recovery process, especially related to the livelihood conditions of survivors after the 15 years of the tsunami, which is monitored through land cover.

Pemanfaatan Citra Satelit Google Earth untuk Penilaian Progres Pemulihan Lahan Pasca 15 Tahun Tsunami Aceh di Kecamatan Lhoong, Aceh Besar Ismiatul Ramadhian Nur; Syamsidik Syamsidik; Saumi Syahreza
Jurnal Rekayasa Elektrika Vol 17, No 1 (2021)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v17i1.19402

The 2004 Indian Ocean Tsunami has changed the land cover of the affected areas. Sixteenth years after the tsunami, studies pertinent to land restoration progress are becoming crucial as one of the needs in assessing the progress of the long-term disaster recovery process. Spatio-temporal land change assessment in a disaster-affected area can be conducted using time-series satellite imagery. One of them is The Google Earth satellite image which has an adequate prior data record. Although it has a single band, the Google Earth satellite imagery has many other advantages: easy access, free of charge, and decent resolution for detailed mapping. This research aims to assess the progress of land restoration by utilizing Google Earth satellite imagery. The applied method is visual observation and on-screen digitization process by Google Earth Pro and QGIS. This study provides outcomes of the trend of land transformation after the tsunami, which shows that the rice fields and ponds have not recovered to the condition before the tsunami. Meanwhile, the length of the road and building area have exceeded the pre-tsunami time. The entire land uses show an increasing trend with varying percentages from 2010 to 2020. This research is essential to carry out as an initial assessment of the long-term recovery process, especially related to the livelihood conditions of survivors after the 15 years of the tsunami, which is monitored through land cover.

PENILAIAN TINGKAT RISIKO BENCANA TSUNAMI UNTUK KAWASAN KOTA BANDA ACEH BERDASARKAN SKENARIO TSUNAMI DESEMBER 2004 Fauziah Fauziah; Eldina Fatimah; Syamsidik Syamsidik
JURNAL TEKNIK SIPIL Vol 3, No 2 (2014): Volume 3, Nomor 2, Januari 2014
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

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

Realignment of Banda Aceh devastated by the tsunami has put forward the concept of disaster mitigation. As the city is aware of the disaster, the availability of disaster risk map is an essential requirement in developing sustainable development and disaster mitigation based. This research aims to generate a map of tsunami risk assessment by loading element of threat, vulnerability, capacity using spatial data and information in the region of Banda Aceh. Risk analysis is conducted using a semi-quantitative weighting factors and the index values arebased on the analysis conducted by BNPB and TDMRC-Unsyiah. Mapping analysis is conducted by overlaying layer(overlay) and vector-based GIS grid. Based on the results of the analysis show that the risk areas with low-to-high tsunami consists of 73 villages high with an area of each is 6.05 km2 (10%). 20.66 km2 (35%) and 16.23 km2. The area is not an area of 17.02 km2 risk or 28% of the total area of the city of Banda Aceh.

KAJIAN POLA SEBARAN SEDIMEN PADA SALURAN BANJIR SUNGAI KRUENG ACEH Alfaisal Alfaisal; Syamsidik Syamsidik; Masimin Masimin
JURNAL TEKNIK SIPIL Vol 6, No 3 (2017): Volume 6, Nomor 3, Mei 2017
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

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

Abstract: Krueng Aceh River is one of the main river in Aceh Province located in Krueng Aceh River Basin Area (DAS) with in 17.800 Acre wide and 145 km length. In order to minimize the flood impact in Banda Aceh with 1.300 m3/s flood discharge design, 900 m3/s discharge has been redirected to Krueng Aceh river floodway while the rest had distributed to the Krueng Aceh existing river. Meanwhile for 900 m3/s of the flood discharge is distributed through the floodway from the diversion weir. It is worried that the water will reach the top of the dike in some location of the main river. It is because of the swallow in the estuary due to the sediment concentration. This research aims is to investigate the sediment distribution pattern, estimating volume of the deposited sediment. Furthermore, the investigation is also to find how the sediment transport occured while the flood. The flood simulation had been done by the Delft3D Model which combine with the hydrodynamics and the sediment transport calculation. This model use 20x20 m grid for the domain. Topography and bathimetry data were collected from Balai Wilayah Sungai Sumatera–I (BWSS-I). Sediment characteristic had been primerly collected in the field. Simulation results had shown that the sediment distribution pattern on Krueng Aceh river floodway has a particular pattern remain relatively on the right side of the estuary. The sediment increase of 868.236 m3 and produced 2.039.560 m3 massive erosion during 3 month simulation with flood scenario. The sedimentation process is smaller compared to the erosion. But the erosion only happen in the area with the greater than value of current. The simulation complimented by 5 years return flood design was uncapable to flush the sediment which deposited on the eastern side of the estuary. The phenomenon happened because of the river morphology with it meandering channel, not enough length of left jetty and the current that not equally distributed. The solution for this problem is by lengthening the left side of the jetty toward the breakwater and constructing the river training toward the current in the left side of the estuary. Abstrak: Krueng Aceh merupakan salah satu sungai besar di Provinsi Aceh, berada dalam wilayah Daerah Aliran Sungai (DAS) Krueng Aceh dengan luas DAS 17.800 Ha dan panjang sungai 145 Km. Untuk meminimalisir terjadinya banjir di kota Banda Aceh dengan debit banjir rancangan sebesar 1.300 m3/detik, maka untuk debit banjir 400 m3/detik dialirkan melalui Sungai Kr. Aceh existing. Sedangkan untuk debit banjir sebesar 900 m3/detik dialirkan melalui saluran banjir dari bendung pelimpah banjir (Diversion Weir). Pada beberapa lokasi di sungai induk dikhawatirkan elevasi muka air akan mencapai puncak tanggul. Ini akibat dari pendangkalan yang terjadi di bagian muara dengan adanya konsentrasi sedimen. Penelitian ini bertujuan untuk mengetahui pola sebaran sedimen pada bagian hilir saluran banjir, mengetahui volume sedimen yang terkonsentrasi setelah kejadian banjir dan mengetahui bagaimana pergerakan sedimen terjadi setelah banjir. Penelitian dilakukan dengan simulasi numerik menggunakan software Delft3D yang berfungsi sebagai model traspor sedimen pada lokasi simulasi. Model ini menggunakan grid dengan ukuran 20 m x 20 m. Data yang digunakan adalah data topografi dan batimetri dari Balai Wilayah Sungai Sumatera-I dan parameter sedimen dari hasil pengambilan sampel di lokasi kajian. Hasil simulasi menunjukkan bahwa, pola sebaran sedimen pada saluran banjir sungai Krueng Aceh memiliki pola yang relatif tetap khususnya pada sisi kanan muara, peningkatan sedimen setelah terjadinya banjir sebesar 868.236 M3 dan yang tergerus sebesar 2.039.560 M3. Artinya volume sedimen yang mengendap lebih kecil dari pada yang tergerus. Namun yang tergerus tersebut hanya pada jalur dengan arus yang lebih besar. Hasil dari simulasi dengan menggunakan debit banjir rancangan lima tahunan, sedimen yang berada di sisi kanan muara tidak mampu tergelontor ke laut. Hal ini diakibatkan karena bentuk meander saluran yang berbelok, jetty di sisi kiri yang kurang panjang dan arus banjir yang tidak merata. Upaya yang dapat dilakukan yaitu dengan memperpanjang jetty sisi kiri sampai kedalaman gelombang pecah dan membuat river training untuk mengarahkan arus ke bagian sedimen di sisi kanan muara.

MONITORING REHABILITASI GARIS PANTAI DI UTARA KECAMATAN JOHAN PAHLAWAN-ACEH BARAT Aminullah Hidayat; Syamsidik Syamsidik; Masimin Masimin
JURNAL TEKNIK SIPIL Vol 5, No 3 (2016): Volume 5, Nomor 3, Mei 2016
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

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

Abstract : Ocean Tsunami on 2004 affects morphology on the shoreline around Meulaboh City with changing the position of the shoreline from the previous conditions to shift toward the mainland. In the last ten years several measurements has been taken to protect and preserve the shoreline, one of them by making a protection structure. The research objective, among others, reviewing changes in the coastline due to tsunami waves and sediment transport processes and review the changes and building envelope performance coastline. Research conducted on sediment transport processes are studied in long shore along the coast. The magnitude of the effect of sediment transport in the building envelope shoreline littoral drift indicates that the process has a passenger capacity large enough to cause accretion and buildup of sediment in a specific area. Stage of methodology was conducted by determine the study area and perform calculations based on the wave fetch. Then proceed with the calculation of sediment transport formulas are available. Shoreline change analysis with Google Earth satellite image time series and tracking with GPS devices along the beach and aided by digitization software ArcGIS. Technical documents and data building coastal protection can be obtained from the relevant agencies. Interviews were conducted by means of in-depth interviews with stakeholders and local communities. The results aim to be achieved from this research is provide information that describes the process of change and restoration of shoreline that will be presented in the form of images and calculating results. The results could be used to be consideration of the type of construction. Furthermore could be used for coastal protection and spatial planning for the coastal zone management related to sediment transport processesKeywords : Tsunami, Coastal Recovery, Longshore Sediment Transport, Coastal Structures Performance.Abstrak : Gelombang Tsunami Tahun 2004 telah menyebabkan perubahan secara geografis pada garis pantai di pesisir utara kecamatan Johan Pahlawan sekitar Kota Meulaboh.Letak garis pantai mengalami perubahan dari kondisi sebelumnya bergeser ke arah daratan. Dalam sepuluh tahun terakhir ini beberapa tindakan dilakukan untuk melindungi dan mempertahankan garis pantai, salah satunya dengan membangun bangunan pengaman pantai. Tujuan penelitian antara lain meninjau perubahan garis pantai akibat gelombang tsunami dan proses sediment transport dan meninjau perubahan dan kinerja bangunan pelindung garis pantai. Penelitian dilakukan terhadap proses sediment transport yang dikaji secara long shore di sepanjang pantai. Besarnya pengaruh sediment transport pada bangunan pelindung garis pantai mengindikasi bahwa proses littoral drift memiliki daya angkut yang cukup besar sehingga dapat menyebabkan akresi dan penumpukan sedimen di kawasan tertentu. Metodologi penelitian dilakukan adalah menentukan lokasi studi dan melakukan perhitungan gelombang berdasarkan fetch. Kemudian dilanjutkan dengan perhitungan sediment transport dengan formula yang tersedia. Perubahan garis pantai dianalisa dengan citra satelit Google Earth time series dan melakukan tracking dengan alat GPS sepanjang pantai dan dibantu dengan digitasi software ArcGIS. Dokumen teknis dan data bangunan pelindung pantai dapat diperoleh dari instansi terkait. Wawancara dilakukan dengan cara in-depth interview dengan pihak terkait dan masyarakat setempat. Hasil yang ingin dicapai dari penelitian ini adalah tersedianya informasi yang menjelaskan proses perubahan dan pemulihan garis pantai yang akan disajikan dalam bentuk gambar dan hasil perhitungan. Hasil penelitian ini dapat digunakan untuk dasar penentuan jenis konstruksi pengaman pantai dan perencaaan tata ruang di kawasan pesisir terkait proses sediment transport.Kata kunci : Tsunami, Coastal Recovery, Longshore Sediment Transport, Kinerja Bangunan Pantai.

Analisis Sedimentasi Kolam Pelabuhan Ulee Lheue dengan Menggunakan Piranti Lunak Delft3D Cut Rizky Ananda; Syamsidik Syamsidik; Amir Fauzi
Journal of The Civil Engineering Student Vol 2, No 3 (2020): Volume 2, Nomor 3, Desember 2020
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

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

Pelabuhan Ulee Lheue merupakan salah satu pelabuhan yang ada di daerah Aceh. Permasalahan sedimentasi yang terjadi pada kolam Pelabuhan Ulee Lheue menyebabkan terganggunya aktifitas pergerakan kapal yang dilakukan di kolam Pelabuhan Ulee Lheue. Tujuan dari Tugas Akhir ini adalah mengestimasi laju dan volume dari sedimentasi yang terjadi di kolam Pelabuhan Ulee Lheue berdasarkan dua skenario panjang breakwater pada kolam pelabuhan tersebut dengan menggunakan pemodelan secara numerik dengan menggunakan Delft3D. Pada pemodelan ini, hanya panjang breakwater yang menjadi tinjauan. Skenario 1 menggunakan panjang breakwater kiri 197 m dan breakwater kanan 254 m, sedangkan skenario 2 menggunakan panjang breakwater kiri 347 m dan breakwater kanan 404 m. Setelah simulasi selama satu tahun didapatkan volume sedimentasi untuk skenario 1 sebesar 150.044,109 m3 dengan laju sedimentasi, yaitu 12.503,676 m3/bulan. Sedangkan untuk skenario 2 didapat sebesar 149.149,064 m3 dengan laju sedimentasi, yaitu 12.429,089 m3/bulan. Berdasarkan hasil simulasi, dapat disimpulkan bahwa konstruksi breakwater pada skenario 1 menghasilkan sedimentasi yang lebih besar dibandingkan dengan konstruksi breakwater pada skenario 2.

Identifikasi Ketahanan Struktur Gedung Evakuasi Di Desa Lambung Terhadap Beban Tsunami Sherlya Wahyuni; Yunita Idris; Syamsidik Syamsidik
Journal of The Civil Engineering Student Vol 3, No 2 (2021): Volume 3, Nomor 2, Agustus 2021
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/journalces.v3i2.13036

Aceh merupakan salah satu daerah yang rawan terhadap gempa dan tsunami. Oleh sebab itu, penting dibangun tempat evakuasi sementara (TES) guna meminimalisir korban yang lebih banyak lagi jika sewaktu-waktu terjadi bencana tsunami. Gedung evakuasi vertikal tsunami merupakan upaya menghindari gelombang tsunami dengan cara naik ke tempat/lantai bangunan yang lebih tinggi dari ketinggian genangan tsunami. Penelitian ini bertujuan untuk mengetahui ketahanan gedung evakuasi vertikal di Desa Lambung dengan menambahkan gaya-gaya tsunami didalamnya. Penelitian ini dimulai dengan melakukan pengumpulan data gedung evakuasi vertikal yang ada di Desa Lambung, kemudian melakukan survei lapangan untuk mendapatkan ukuran dan dimensi gedung yang diperlukan untuk penelitian. Pada penelitian ini perhitungan beban gempa menggunakan Standar Nasional Indonesia (SNI 1726:2012) dan beban tsunami menggunakan standar Federal Emergency Management Agency (FEMA P646). Menurut FEMA P646 beban tsunami terbagi menjadi 8 gaya. Setelah semua data terkumpul, maka akan dilakukan pemodelan struktur bangunan dengan menggunakan software SAP2000, dengan menginput beban mati, beban hidup, beban gempa, dan beban tsunami yang menggunakan gaya hidrodinamik dan gaya debris. Berdasarkan hasil displacement dari beban gempa, maka displacement terbesar arah x dan y terdapat pada kombinasi 2, yaitu didapat nilai displacement terbesar arah x adalah 0,016235 m pada titik 441 dan pada arah y sebesar 0,05852 m pada titik 441. Sedangkan dari beban tsunami displacement terbesar arah x dan y didapat pada kombinasi 18, dengan nilai displacement terbesar arah x adalah 0,012513 m pada titik 232 dan pada arah y sebesar 0,213146 m pada titik 232. Dapat dilihat bahwa displacement terbesar terjadi akibat beban tsunami. Pada displacement struktur gedung masih aman terhadap beban gempa dan tsunami menurut SNI 1726-2012, akan tetapi pada simpangan antar lantai struktur gedung hanya aman terhadap beban gempa saja.

Title

Found 21 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 21 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 21 Documents
Search