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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.

Penilaian Kapasitas Struktur Bangunan Eksisting Sebagai Tempat Evakuasi Vertikal di Kecamatan Baitussalam Karundeng, Chresky Nofelri; Idris, Yunita; Syamsidik, Syamsidik; Abdullah, Nora
Journal of The Civil Engineering Student Vol 3, No 3 (2021): Volume 3, Nomor 3, Desember 2021
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/journalces.v3i3.17815

Kecamatan Baitussalam, Aceh Besar merupakan salah satu daerah terdampak bencana tsunami tahun 2004. Usaha mitigasi di Kecamatan ini masih berupa jalur-jalur evakuasi. Tempat evakuasi vertikal belum tersedia. Sehingga diperlukan tempat evakuasi vertikal terdekat untuk mengantisipasi bencana terulang kembali. Tempat evakuasi dapat dikembangkan dari bangunan eksisting. Sehingga penilaian kapasitas struktur dan fungsi bangunan eksisting sebagai tempat evakuasi vertikal dapat dipertimbangkan, maka tujuan penelitian ini adalah melakukan penilaian kapasitas struktur bangunan eksisting sebagai tempat evakuasi vertikal. Bangunan yang ditinjau yaitu Gedung A Yayasan Kesehatan Masyarakat dan Gedung SMAN 1 Baitussalam. Metode yang digunakan yaitu melakukan asesmen lapangan untuk mendapatkan data gedung kemudian dimodelkan pada SAP2000 v.22. Dari hasil pemodelan Pada SAP2000 v.22 dan persyaratan ketinggiaan fasilitas evakuasi, bangunan-bangunan ini belum memenuhi kriteria fasilitas tempat evakuasi sehingga perlu dilakukan penambahan tingkat dan perubahan penampang. Gedung yang telah ditambah tingkat dan diubah dimensi penampang pada SAP2000 v.22 aman terhadap gempa dan tsunami serta dapat menjadi pertimbangan dalam perencanaan pengembangan tempat evakuasi vertikal di Kecamatan ini.

KAJIAN POLA OPERASI WADUK KEUREUTO UNTUK MEMENUHI KEBUTUHAN AIR BAKU DI KABUPATEN ACEH UTARA PROVINSI ACEH Ramadhan, Kadri; Masimin, Masimin; Syamsidik, Syamsidik
JURNAL TEKNIK SIPIL Vol 1, No 4 (2018): Volume 1 Special Issue, Nomor 4, Februari 2018
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jts.v1i4.10066

Abstract: One of the rivers that has potency to be developed for the purpose of fulfilling the need of water in North Aceh Regency is Krueng Keureuto River. From its potential characteristic, the appropriate conservation effort is by constructing a water reservoir. The construction of Keureuto Reservoir is located in Krueng Keureutos stream in Paya Bakong Sub-district. The purpose of this research is to determine inflow debit of Keureuto Reservoir based on the probability of debit by dividing it into three operation year, to determine the debit of water need of Keureuto Reservoir for the need of raw water, and to determine optimization to optimize the Elevation of water surface in Keureuto Reservoir in wet year, normal year, and dry year. The method of reservoir operation was analyzed by using optimization technique by using program solver (Microsoft Excel). The first step is done by dividing the inflow debit data into three kinds of operation year, that is, dry, normal, and wet year. Next, the need of water in Keureuto Reservoir was analyzed based on the need of water. Storage is obtained from curve data of reservoirs capacity while output was obtained from the data of reservoirs need of water. Then, the arrangement and optimization in operation pattern of Keureuto Reservoir was done. The water of Keureuto Reservoir is used to fulfil three necessities, that is, to fulfill the preservation of the river stream as much as 1,11m3/s, to fulfil the peoples water necessity as much as 0,50 m3/s and to fulfil the need of water for irrigation as much as 0,82 m3/s. The result of optimization of fulfilling the need of raw water from Keureuto Reservoir shows that the maximum elevation in dry year is 98,75m and the minimum elevation is 80 m. In normal year, the maximum elevation is 100 m and the minimum is 81 m, while in wet year, the maximum elevation is 100,60 m and the minimum is 83 m.Abstrak: Salah satu sungai yang berpotensi untuk dikembangkan dalam upaya pemenuhan kebutuhan air di wilayah Kabupaten Aceh Utara adalah Sungai Krueng Keureuto, Dari potensi air tersebut maka upaya konservasi yang tepat adalah dengan membangunan sebuah waduk. Pembangunan Waduk Keureuto ini berada pada aliran Sungai Krueng Keureuto Kecamatan Paya Bakong. Maksud dari kajian ini adalah Menentukan debit inflow Waduk Keureutoe berdasarkan probabilitas debit dengan pembagian tiga jenis tahun operasi, Menentukan debit kebutuhan air Waduk Keureuto untuk kebutuhan air baku, dan Melakukan optimasi untuk mengoptimalkan Elevasi Muka Air Waduk Keureuto pada Tahun Basah, Tahun Normal dan Tahun Kering. Metode pengoperasian waduk dianalisis menggunakan teknik optimasi dengan program solver (Microsoft Excel). Tahapan yang dilakukan adalah data debit inflow waduk dibagi menjadi tiga jenis tahun operasi yaitu tahun kering, normal, dan tahun basah. Selanjutnya dianalisis kebutuhan air waduk Keureuto berdasarkan data kebutuhan air. Storage diperoleh dari data lengkung kapasitas waduk, sedangkan output diperoleh dari data kebutuhan air waduk. Setelah itu penyusunan dan optimasi pada pola operasi Waduk Keureuto. Air waduk Keureuto digunakan untuk memenuhi tiga kebutuhan yaitu pemenuhan kebutuhan aliran pemeliharaan sungai sebesar 1,11 m3/s, pemenuhan kebutuhan air penduduk sebesar 0,50 m3/s serta pemenuhan kebutuhan air untuk irigasi sebesar 0,82 m3/s. Hasil optimasi untuk pemenuhan kebutuhan air baku dari Waduk Keureuto menunjukkan bahwa Elevasi Maksimum pada tahun kering berada pada Elevasi 98,75 m, dan Elevasi Minimum berada pada Elevasi 80 m, untuk tahun normal Elevasi Maksimum berada pada Elevasi 100 m dan Elevasi Minimum berada pada Elevasi 81 m, sedangkan Elevasi Maksimum tahun basah berada pada Elevasi 100,60 m dan Elevasi Minimum berada pada Elevasi 83 m.

EVALUASI JARINGAN DAERAH IRIGASI BULOH BLANG ARA Darsina, Sri; Azmeri, Azmeri; Syamsidik, Syamsidik
JURNAL TEKNIK SIPIL Vol 1, No 4 (2018): Volume 1 Special Issue, Nomor 4, Februari 2018
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jts.v1i4.10060

Abstract: Buloh Blang Ara Irrigation area includes in North Aceh District. The Location of D.I Buloh Blang Ara is located in DAS Buloh with the Total DAS is 25.60 km2. It is 9.15 % of total from WS Kr. Peusangan. The main river is Kr. Buloh with 5.97 lengths. Buloh Blang Ara Irrigation Area has 1,200 Hectares, 1,804 m primary channel length and 13,155 secondary channel lengths with some channel is land channel and some other is concrete channel,the intake is divided into two which are right intake and left intake. There is the water reduction supply which cause in the planting season, there is water shortage in DI. Buloh Blang Ara.This research aims to evaluate the network of Buloh Blan gAra Irrigation and to give the recommendations based on the study results obtained. The methodology used in the research is survey method and data analysis to determine the condition and function of irrigation networks.The network investigation shows that generally the network condition is good but only not well function because of the less of maintenance.Abstrak: Daerah Irigasi Buloh Blang Ara termasuk dalam wilayah Kabupaten Aceh Utara. Lokasi D.I Buloh Blang Ara terletak di dalam DAS Buloh dengan luas DAS 25,60 km2, memiliki persentase sebesar 9,15 % dari total luas keseluruhan WS. Kr. Peusangan. Sungai Utama pada DAS tersebut adalah Kr. Buloh dengan panjang sungai 5,97 km. Daerah Irigasi Buloh Blang Ara dengan luas areal 1200 Ha, memiliki panjang saluran induk sepanjang 1.804 m dan saluran sekunder sepanjang 13.155 m dengan kondisi saluran sebagian tanah dan sebagian beton,intake terbagi dua yaitu intake kanan dan intake kiri. Saat ini terjadi penurunan layanan suplai air sehingga pada setiap musim tanam areal yang ada pada Daerah Irigasi Buloh Blang Ara kekurangan air. Tujuan dari penelitian ini adalah : mengevaluasi jaringan irigasi Buloh Blang Ara dan memberi rekomendasi berdasarkan hasil yang diperoleh dari hasil studi. Metode yang digunakan pada penelitian ini adalah metode survei dan analisis data untuk mengetahui kondisi dan fungsi jaringan irigasi. Penelusuran jaringan menunjukkan bahwa kondisi saluran pada umumnya dalam keadaan baik , hanya saja tidak lagi berfungsi sebagaimana mestinya karena kurangnya pemeliharaan.

KEANDALAN EMBUNG LAMBADEUK UNTUK PEMENUHAN AIR BERSIH DI DAERAH PESISIR KECAMATAN PEUKAN BADA ACEH BESAR Budi, Setia; Azmeri, Azmeri; Syamsidik, Syamsidik
JURNAL TEKNIK SIPIL Vol 1, No 4 (2018): Volume 1 Special Issue, Nomor 4, Februari 2018
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jts.v1i4.10059

Abstract : Water demand fulfillment in coastal area of Peukan Bada Sub District is still complicated. Peukan Bada Community in coastal area currently still depends on well water. The existence of Lambadeuk Small Dam located in Peukan Bada Sub District Aceh Besar, which River Flow Area (DAS) is 2.27 Km, is expected to be able in fulfilling clean water demand. The objectives of this research are to find out water supply, to optimize the operation and to obtain the reliability of Lambadeuk Small Dam Operation. The method used in operating the small dam is analyzed by Non Linear Program using Solver Microsoft Excel. In optimizing the operation, it is divided into three season conditions. The highest inflow discharge of dry season is in January which is 0.222 m3/sec or 0.594 MCM, while the highest inflow discharge of normal season is in December which is 0.294 m3/sec or 0.787 MCM, and the highest inflow discharge of wet season is in November which is 0. 463 m3/sec or 1.199 MCM. The projection of population and clean water demand for population need in coastal area of Peukan Bada Sub District can be described as for population 5,954 in 2015, the clean water demand is 0.0099 m3/sec so that in 2035, the population will become 10,534 and the clean water demand will be 0.0176 m3/sec. The average inflow from 2015 to 2035 for dry season is 4.031 MCM, for normal season is 5.816 MCM, and for wet season is 9.077 MCM. Water release is 0.312 MCM, and basic water demand is 0.556 MCM. Optimization reliability of Lambadeuk Small Dam Operation is reliable and 100% can fulfill the water demand in the downstream of the small dam, and the management organizer of Lambadeuk Small Dam can also expand service area of clean water demand in the coastal area of Peukan Bada Sub District Aceh Besar.Abstrak: Dalam pemenuhan kebutuhan air bersih di daerah pesisir Kecamatan Peukan Bada masih kesulitan untuk kebutuhan air bersih. Selama ini masyarakat di daerah pesisir masih mengandalkan air sumur. Dengan adanya Embung Lambadeuk yang terletak di Kecamatan Peukan Bada Kabupaten Aceh Besar, yang mempunyai luas Daerah Aliran Sungai (DAS) 2,27 Km, mampu untuk pemenuhan kebutuhan air bersih. Tujuan dari penelitian ini untuk mengetahui ketersediaan air, mengoptimalkan pengopersian dan mendapatkan keandalan pengopersian Embung Lambadeuk. Pada penelitian ini metode pengoperasian embung yang dianalisis menggunakan program Non Linear dengan solver Microsoft Excel. Dalam optimasi pengoperasian dikelompokan dalam tiga kondisi tahun musim, dimana kondisi tahun musim kering debit Inflow yang tertinggi berada pada bulan Januari sebesar 0,222 m3/dt dengan kapasitas 0,594 MCM, pada kondisi tahun normal debit yang tertinggi berada pada bulan Desember sebesar 0,294 m3/dt dengan kapasitas 0,787 MCM dan pada kondisi tahun basah debit yang tertinggi pada bulan Nopember sebesar 0,463 m3/dt dengan kapasitas 1,199 MCM. Proyeksi jumlah penduduk dan kebutuhan air bersih untuk pemenuhan penduduk di pesisir Kecmatan Peukan Bada, tahun 2015 dengan jumlah penduduk sebesar 5.954 jiwa, kebutuhan air bersih 0,0099 m3/dt dan Tahun 2035 jumlah penduduk sebesar 10.534 jiwa, kebutuhan air bersih 0,0176 m3/dt. Untuk Inflow tahun kering dari Tahun 2015 sampai Tahun 2035 Inflow rata-rata tahunan sebesar 4,031 MCM, tahun normal dari Tahun 2015 sampai tahun 2035 Inflow rata-rata sebesar 5,816 MCM, dan tahun basah Inflow rata-rata tahunan sebesar 9,077 MCM. Release air sebesar 0.312 MCM, dan kebutuhan air baku sebesar 0,556 MCM. Hasil yang dicapai adalah Pengoperasian Embung yang Optimal dan Keandalan Pengoperasian Embung. Dimana Keandalan Pengoperasian Embung Lambadeuk sangat berpengaruh dari volume dan periode waktu, dan terhadap Manajemen pengelola Embung Lambadeuk, bisa mengambil langkah-langkah untuk memperluas daerah layanan kebutuhan air bersih di pesisir Kecamatan Peukan Bada Aceh Besar.

A New Multi-Purposes Flume Experiments Facility: Challenges and Opportunity for Tsunami and Coastal Engineering in Indonesia Syamsidik, Syamsidik; Benazir, Benazir; Pratama, Nadri; Arifullah, Arifullah; Fatimah, Eldina; Nazaruddin, Nazaruddin; Tarmizi, Tarmizi; Ibrahim, Ibrahim; Zein, Ikramullah
International Journal of Disaster Management Vol 6, No 3 (2023)
Publisher : TDMRC, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/ijdm.v6i3.34568

Physical modelling for tsunami engineering is rather difficult to conduct due to lack of comprehensive and advanced facilities to do so. Large number of simulations of the tsunami impacts were performed numerically. In early 2023, a new advanced tsunami flume facility has been completed at Tsunami and Disaster Mitigation Research Center (TDMRC) of Universitas Syiah Kuala. This flume has 60 m in length, 2.5 m in width, and 1.7 m in height. The flume is also equipped with a number of wave, pressure, and current sensors, Particle Image Velocimetery (PIV) Camera, and a laser bed profiler. Beside of the tsunami generator, this flume is also capable to generate wind-driven waves (with two large wind turbines), regular and irregular waves, and currents. The flume provides new opportunities as well as challenges for tsunami scientists and engineers in Indonesia to collaborate and to perform novel researches in tsunami mitigation. This article is aimed at elucidating technical challenges and opportunities in performing tsunami physical models with the large tsunami flume. we performed a series numerical models using DualSPHysic. The results show that composite beach slopes inside the flume has succesfully mimic shallow coast effects that later deformed the incoming tsunami waves into breaking, bores, and runup. Challenges were identified in absorbing tsunami waves with more than one incoming wave to the observation area. In the future, this facility will be accessible for scientists and engineers to collaborate in tsunami science and engineering researches.

Influence of Tides Level on Tsunami Hydrodynamic in Banda Aceh, Indonesia Tursina, Tursina; Syamsidik, Syamsidik; Kato, Shigeru; Afifuddin, Mochammad
International Journal of Disaster Management Vol 6, No 3 (2023)
Publisher : TDMRC, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/ijdm.v6i2.34538

Tides are the dominant physical process in the coastal environment. During high tide, water from the ocean flows through the bays and estuaries, causing inundation and raising water elevation. When low tides condition, the water level becomes lower than average and recedes into the sea. This process continues for a long day. Tsunami waves will interact with all coastal processes and affect the hydrodynamic forces of tsunami waves. In the deep sea, tides do not significantly influence wave propagation. However, in the shallow water zone, tides can change tsunami heights and affect the extent of inundation. Tides are usually ignored in tsunami hazard analysis. This would be an underestimate of the tsunami hazard calculation. This study aims to investigate tides' influence on tsunami runup hydrodynamics in Banda Aceh. The potential tsunami from an earthquake in the Aceh-Andaman subduction zone is modeled using COMCOT (Cornell Multi Grid Coupled Tsunami Model) with magnitudes Mw 9.2, 8.6, and 8.2. We simulated the response of the three earthquake magnitudes on two different types of high and low tides. Several virtual gauges were placed to observe the tsunami height. Virtual gauges were also used to observe the tsunami arrival time at four tsunami escape buildings in Banda Aceh: the Ulee Lheue escape building, the Deah Glumpang escape building, the Alue Deah Teungoh escape building, and the Lambung escape building. The results show that the highest tide amplifies the tsunami inundation will be extended to about 30% farther inland compared to the condition if the tsunami occur during mean sea level condition.The interactions between tsunami and high tide significantly shorten tsunami arrival time on small magnitude tsunamis and are not significant in a large tsunami. This information is useful for enhancing early warning systems and evacuation procedures that can be adjusted to the tidal conditions in the study area.

Spatio-Temporal Analysis of Ground Movement Using Unmanned Aerial Vehicle Photogrammetry in Gampong Lamkleng, Aceh Besar Amalia, Nabila; Syamsidik, Syamsidik; Ismail, Nazli
International Journal of Disaster Management Vol 6, No 1 (2023)
Publisher : TDMRC, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/ijdm.v6i1.31770

Ground movement is one of the most frequent disasters causing major damages in Indonesia. Unmanned Aerial Vehicle (UAV) has been widely used as a rapid observation method to obtain detailed characterization of ground movement. Often, active landslide area is difficult to access. This hinders close monitoring and observations of the ground movement. This study aims to demonstrate the use of UAV as tools for monitoring and observations on active ground movement area and to validate the results. For this purpose, the study was conducted at Gampong Lamkleng, Aceh Besar-Indonesia using spatio-temporal analysis by UAV photogrammetry. The UAV was chosen because it is easy to use, practical, and safe for landslide area that are relatively small and difficult to reach. Aerial photographs were processed using the Agisoft Metashape software in modeling and analyzed using Quantum GIS (QGIS) and ArcGis. The observation results show that the largest ground movement occurred in January 20 to 23, 2021 which was related to precipitation rates measured at a nearby rainfall station. The movement volume was 1,411.063 m3 and a rate of ground movement reaching 0.69 m/day due to heavy rain. The estimated value of losses is IDR 1,055,854,000. The UAV images analysis were compared to actual ground elevation measured using Real-Time Kinematic (RTK). The validation show that the accuracy based on comparison between photogrammetric and RTK measurement was at agreeable rate (99%). Otherwise, the accuracy performed on 19 check point using Root Mean Square Error analysis found that the accuracy was still very low. The low RMSE value is due to the georeferencing process using the Ground Control Point not being carried out.

Level of Coastal Protection Damage and Priority of Handling (Case Study of Alue Naga Neuheun, Aceh Besar, Indonesia) Mauluddin, Syahrul; Meilianda, Ella; Syamsidik, Syamsidik
International Journal of Disaster Management Vol 2, No 1 (2019)
Publisher : TDMRC, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/ijdm.v2i1.14138

The massive tsunami of December 26, 2004 has had a huge impact on the life of the coastal region. The effects of the tsunami caused damage to occupation settlements, loss of waterside land and destruction of marine biota ecosystems. The coastal region of Aceh Province in Indonesia is the area that has the worst impact followed by the State of Malaysia, Thailand and as a coastal area of India. As a result of a large amount of coastal land experiencing a loss of land mass, erosion is very significant. As a step towards handling coastal areas from greater erosion prevention, the Government of Indonesia in 2005 adopted a policy of handling rehabilitation and reconstruction through the ANTERP (Aceh Nias Tsunami and Earthquake Response Program) program under the BRR (Rehabilitation and Reconstruction Agency) in collaboration with Ministry of Public Work. One of the steps to handling erosion is to protect the coast using the hard structure method such as the construction of a revetment and jetty made from rock armor. This study aims to assess the level of damage and priority of handling of coastal protective structures that have been built in 2009, 2016 and how changes in shoreline occur on the beach location of Alue Naga - Neuheun, which is a coastal area that was greatly affected by the tsunami. Assessments were carried out in three different coastal structures, namely CS-1 locations in the Alue Naga area, CS-2, Lambada Lhok coastal area and CS-3 Neuheun beach area. Guidelines for assessing structure damage and changes in shoreline in the study using the Ministry of Public Work Regulation No. 08/SE/M/2010. The rate of change in shoreline is obtained through computational calculations of the DSAS (Digital Shoreline Analysis System) program using the EPR (End Point Rate) method and NSM for change distance (Net Shoreline Movement).

ANALISIS PERUBAHAN GARIS PANTAI AKIBAT PENGARUH PEMASANGAN GROPOZAG (Studi Kasus Pantai Neuhen, Aceh Besar) Andre, Sofyan; Fatimah, Eldina; Syamsidik, Syamsidik
Teras Jurnal : Jurnal Teknik Sipil Vol. 11 No. 2 (2021): Volume 11 Nomor 2, September 2021
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v11i2.458

Abstract At the present time, a lot of researchs and treatments have been carried out by experts to minimize the bad effects due to erosion and sedimentation, including the application of groin. Beach structure of the groyne generally used on the Indonesia beaches is groin solid model (impermeable) in which no water can pass the groin. The various types, configuration, material, and height of groin have been applied in Aceh. One of the types is porous zig-zag type groin (gropozag). This type had been tested both as physical model in the laboratory and numerical model. However, the performance application in the field had been rarely carried out. This paper aims to determine the effect of the gropozag application on the coastline changes in the Neuheun Beach. The groin was made of cubes arranged in a zigzag pattern. The size of a unit cube was 1m x 1m x1m with several holes on either side. The upper side was open and the bottom side was completely closed without any holes. Several cube units were assembled into a single groyne series and placed perpendicular to the coast. The observation carried out was without gropozag condition year 2017 and after gropozag installation tear 2019. Output of the research showed that the Gropozag application affected the coastline changes in the left and right area of the Gropozag. The erosion carried out in the left side of the gropozag which was affected by the waves from northeast was higher than the right side of the gropozag. Keywords: coastline change, sedimentation, erosion, groin, gropozag

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