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Jurnal Teknik Sipil
Published by Universitas Malikussaleh
ISSN : 20880561     EISSN : 25021680     DOI : https://doi.org/10.29103/tj.v16i2.1360
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Focus and Scope Teras Jurnal - Jurnal Teknik Sipil is a journal that communicates the results of research within the scope of civil engineering and scientific development as well as aspects of practitioners. The process of manuscript submission is open throughout the year. All submitted manuscript will be screened with double-blind peer review and editorial review before they are accepted to publish. Teras Jurnal receives a manuscript from the following area below civil engineering science and development with the interdisciplinary and multidisciplinary approach: Building Materials and Structures Constructions Technology Constructions Economy and Management Earthquake Engineering Environmental Engineering Renovation of Buildings Geotechnical Engineering Highway Engineering Hydraulic and Hydraulic Structures Road and Bridge Engineering Structural Engineering Surveying and Geo-Spatial Engineering Transportation Engineering Tunnel Engineering Urban Engineering and Economy Water Resources Engineering Urban Drainage
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Articles 441 Documents
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Studi Perilaku Tiang Group Pada Lapisan Tanah Terlikuifaksi Adolf Situmorang; Anik Kustirini; Hani Purwanti
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 1 (2024): Volume 14 Nomor 1, Maret 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i1.983

Abstract

Abstrak Likuifaksi merupakan satu fenomena yang terjadi pada lapisan tanah akibat gempa bumi. Pada saat terjadi likuifaksi tanah mengalami peningkatan tekanan air pori yang menyebabkan tanah kehilangan kuat geser sehingga mengalami penurunan tegangan efektif dan secara linier mengakibatkan penurunan kuat geser. Penelitian ini dibuat untuk mengetahui perubahan perilaku tiang akibat lapisan tanah terlikuifaksi disepanjang tiang. Semua analisa perubahan perilaku tiang dibandingkan dengan kondisi atau kondisi tidak ada lapisan terlikuifaksi, sehingga dapat diketahui perubahan perilaku tiang ketika ada lapisan teriluifaksi. Dari hasil analisa defleksi diketahui bahwa terjadi perubahan defleksi yang besar jika dibandingkan antara lapisan tidak terlikuifaksi dengan lapisan terlikuifaksi, yaitu dari 0,16 mm menjadi 4,32 mm atau meningkat sebesar 4.16 mm. Perubahan momen untuk lapisan tidak terlikuifaksi 23 kN menjadi 219 kN untuk kondisi lapisan terlikuifaksi atau meningkat sebesar 196 kN.m, hal yg sama pada perubahan daya dukung yang mengalami penurunan ketika terjadi likuifaksi, sehingga disimpulkan bahwa ada perubahan perilaku tiang jika terdapat lapisan terlikuifaksi. Kata kunci: likuifaksi, sondir, daya dukung tiang, defleksi   Abstract Liquefaction is a phenomenon that occurs in soil layers due to earthquakes. When liquefaction occurs, the water pressure of soil has increased which causes the soil to lose shear strength, resulting in a decrease in effective stress and linearly resulting in a decrease in shear strength. This research was conducted to determine changes of pile behavior due to liquefaction of the soil layer along the pile. All analyses of changes of pile behavior are compared with conditions where there is no liquefaction layer, so that changes of pile behavior can be seen when there is liquefaction layer of soil. The results of the deflection analysis, it is known that there is a large change in deflection when compared between the non-liquefaction layer and the liquefaction layer, namely from 0.16 mm to be 4.32 mm or increases 4.16 mm. The change in moment for the liquefaction layer is 23 kN to be 219 kN for the liquefaction layer condition or increases 196 kN.m, the same thing as the change in bearing capacity which decreases when liquefaction occurs, so it is concluded that there is a change of pile behavior if there is a liquefaction layer. Keywords: liquefaction, CPT, bearing capacity of pile, deflection
Evaluasi Kapasitas Tampang Drainase Kawasan Perumahan Desa Leuhan Kabupaten Aceh Barat meylis safriani; M. Arrie Rafshanjani; Fitry hasdanita; Alfiansyah Yulianur
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 1 (2024): Volume 14 Nomor 1, Maret 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i1.999

Abstract

Abstrak Banjir yang melanda Desa Leuhan Dusun Raja Ampat kabupaten Aceh Barat disebabkan limpasan air hujan yang mengenangi kawasan setempat. Penyelesaian yang tepat untuk mengatasi banjir kota adalah evaluasi kapasitas penampang drainase. Tujuan penelitian ini untuk mengetahui debit banjir rancangan dan kapasitas penampang drainase. Metode penelitian dilakukan dengan analisis hidrologi dan analisis hidrolika. Hujan rencana dan debit rancangan ditentukan dengan analisis hidrologi. Analisis debit banjir rancangan kala ulang dihitung dengan metode rasional. Kapasitas dan dimensi penampang drainase dihitung berdasarkan analisi hidrolika dengan software HEC-RAS 5.0. Hasil penelitian diperoleh hujan rencana dan debit banjir rencana untuk periode ulang sepuluh tahun yaitu, 259,957 mm dan 712,393 m³/s. Hasil analisis menunjukkan sembilan penampang drainase perlu dilakukan evaluasi. Penampang drainase mengalami luapan disebabkaan oleh ketidakamampuan menampung debit banjir pada saat terjadinya hujan. Setelah dilakukan evaluasi dan perlebaran penampang saluran drainase tinggi luapan mengalami penurunan bahkan tidak terjadi luapan di saluran drainase kawasan perumahan Desa Leuhan.  Kata kunci: drainase , analisis frekuensi, debit banjir, Hec-Ras 5.0, Log Person III Abstract Flooding in Leuhan Village, Raja Ampat Hamlet, West Aceh District is caused by rainwater runoff that inundates the local area. The right solution to overcome urban flooding is the evaluation of drainage cross-sectional capacity. The purpose of this study was to determine the design flood discharge and drainage cross-sectional capacity. The research method was conducted with hydrological analysis and hydraulics analysis. Rainfall and design discharge were determined by hydrological analysis. The analysis of the design flood discharge of the return period was calculated by the rational method. The capacity and dimensions of the drainage cross section were calculated based on hydrological analysis with HEC-RAS 5.0 software. The results of the study obtained the rainfall plan and the flood discharge plan for the ten-year return period, namely, 259.957 mm and 712.393 m³/s. The analysis results show that nine drainage cross sections need to be evaluated. The drainage cross section experienced overflow due to the inability to accommodate flood discharge during rainfall. After the evaluation and widening of the drainage channel cross section, the overflow height has decreased and there is no overflow in the drainage channel of the Leuhan Village residential area. Keywords: Drainage, frequency analysis, flood discharge, Hec-Ras 5.0, person log lll
Evaluasi Tatakelola Pembangunan Jembatan Wae Racang Di Kabupaten Manggarai Provinsi NTT Kasmir Gon
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 1 (2024): Volume 14 Nomor 1, Maret 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i1.1002

Abstract

The Wae Racang Bridge is a node for Road Sections: Golowoi-Meda, Beo Kina-Pau-Wae Racang and Muwur-Bapa-Wae Racang. The bridge was built on the Wae Racang River which is the boundary between West Cibal District and North Rahong, which was built in 2014 and hasnt been used at all by infrastructure users until April 2023. This study aims to find out the causes of the unutilized bridge based on public perceptions and to evaluate the management of regional infrastructure. The research was carried out in several stages, including review of related journal articles, observation of research locations, observations of the PUPR Office as the organizer of the work, surveys of community perceptions, simple statistical data processing to find out the dominant response, discussion, and conclusions. Of the 43 respondents, the dominant response stated that the budget planning wasnt based on a feasibility study on economic feasibility studies, resulting in the Wae Racang Bridge being built not bringing economic benefits to the community, so that the development budget became redundant which describes the performance and management of local regional administrations in the matter of transportation infrastructure development still needs to be improved because it doesnt consider sustainability aspects at all. bridge construction.
Analisis Banjir pada Polder Sunter Timur II dengan Menggunakan HEC-RAS (Ras Mapper) Agis Setiyowati; Evi Anggraheni
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 1 (2024): Volume 14 Nomor 1, Maret 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i1.1003

Abstract

Abstrak Banjir di Jakarta menimbulkan kerusakan dan kerugian, menjadi latar belakang dilakukannya analisis banjir di Polder Sunter Timur II yang disajikan dalam makalah ini. Wilayah hilir Jakarta terbagi menjadi 43 sistem polder dan salah satunya adalah Polder Sunter Timur II. Studi ini bertujuan untuk mendapatkan luas daerah banjir rencana Polder Sunter Timur II. Analisis hidrologi menggunakan software HEC-HMS dan analisis banjir menggunakan HEC-RAS (Ras Mapper). Data input yang digunakan dalam pemodelan yaitu Digital Elevation Model (DEM), hidrograf, peta penggunaan lahan. Daerah tangkapan air polder Sunter Timur II sebesar 1,328 km2. Hasil simulasi HEC-HMS didapat debit banjir rencana kala ulang 5, 10 dan 25 tahun yaitu sebesar 185 m3/dt, 208,7 m3/dt, 234,3 m3/dt. Hasil simulasi HEC-RAS menunjukkan luas daerah banjir dengan debit banjir kala ulang 5, 10 dan 25 tahun adalah 857,08 Ha, 885,62 Ha, 979,59 Ha. Kata kunci: banjir, sistem polder, analisis hidrologi, HEC-HMS, HEC-RAS Abstract Flood in Jakarta cause damage and losses are the reason for flood analysis of the East Sunter II Polder presented in this paper. Downstream area of Jakarta is divided into 43 polder systems and one of them is East Sunter II Polder. This study aims to obtain the flood area of Polder East Sunter II plan. Hydrological analysis using HEC-HMS software and flood analysis using HEC-RAS (Ras Mapper). Input data used in modeling are Digital Elevation Model (DEM), hydrograph, land use map. Catchment area of the East Sunter II polder is 1,328 km2. The result of HEC-HMS, for 5-, 10- and 25-year return period flood discharge is 185 m3/s, 208,7 m3/s, 234 m3/s. The results of HEC-RAS show that the flood area with 5, 10 and 25-year return period flood discharge is 857,08 Ha, 885,62 Ha, 979,59 Ha. Keywords: flood, polder system, hydrology analysis, HEC-HMS, HEC-RAS
Analisis Wilayah Kerentanan Bencana Banjir Berbasis Sistem Informasi Geografis di Kota Lhokseumawe Cut Ayu Lizar; Halus Satriawan; Cut Azizah
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 1 (2024): Volume 14 Nomor 1, Maret 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i1.1004

Abstract

Abstrak Lhokseumawe merupakan wilayah yang sering terjadi banjir atau genangan. Pencegahan banyaknya korban serta kerugian material dapat dilakukan dengan zonasi wilayah rentan banjir. Metode analisis penelitian adalah deskriptif analitik. Sistem informasi geografis yang merupakan sistem informasi berbasis komputer digunakan dalam penelitian. Aplikasi Software Arcgis 10.8 digunakan untuk penyajian informasi dan pemetaan zonasi kerentanan banjir. Setiap parameter dilakukan proses scoring menggunakan metode AHP dan klasifikasi nilainya dilakukan overlay. Tujuan penelitian adalah mengklasifikasi data dasar parameter kerentanan banjir dalam bentuk spasial, pemetaan wilayah rentan banjir, serta diketahuinya faktor penyebab banjir yang paling dominan.  Hasil penelitian diperoleh wilayah sangat rentan banjir 51,08 km2 (37,27%), rentan 81,42 km2 (59,40%), kerentanan sedang 3,75 km2 (2,74%), sedikit rentan 0,41 km2 (0,30%) dan tidak rentan 0,39 km2 (0,29%). Faktor penyebab banjir yang paling dominan adalah densitas drainase dengan kategori sangat buruk dan buruk dengan persentase 95,37% sehingga kurang baiknya sistem pengaliran. Kata kunci: zonasi, kerentanan, banjir, arcgis, AHP  Abstract Lhokseumawe an area that often experiences flood or inundation. Preventing large numbers of victims and material losses can be done by zoning areas prone to flooding. The research analysis method is descriptive analytic. Geographic information systems, which are computer-based information systems, are used in research. The Arcgis 10.8 software application is used to present information and map flood vulnerability zoning. Each parameter is subjected to a scoring process using the AHP method and the value classification is overlaid. The aim of the research is to classify basic data on flood vulnerability parameters in spatial form, map flood vulnerable areas, and identify the most dominant factors causing floods. The research results showed that the area was very vulnerable to flooding 51.08 km2 (37.27%), vulnerable 81.42 km2 (59.40%), moderately vulnerable 3.75 km2 (2.74%), slightly vulnerable 0.41 km2 (0.30%) and not susceptible 0.39 km2 (0.29%). The most dominant factor causing flooding is drainage density in the very poor and poor categories with a percentage of 95.37% so that the drainage system is not good. Keywords: zonation, vulnerability, flood, Arcgis, AHP
Analisis Karakteristik Tanah Gambut Berserat dan Dampaknya Terhadap Infrastruktur Dewi Amalia; Elrich Gratiawan WD Gulo; Faisal Estu Yulianto; Yusmiati Kusuma; Ery Radya Juarti; Apip Pudin
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 1 (2024): Volume 14 Nomor 1, Maret 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i1.1008

Abstract

Abstrak Indonesia merupakan salah satu negara dengan sebaran lahan gambut yang luas. Gambut dikenal sebagai tanah yang bermasalah dalam pekerjaan konstruksi karena memiliki daya dukung yang rendah sehingga tidak dapat menopang pondasi infrastruktur. Tujuan penelitian ini adalah untuk menganalisis karakteristik tanah gambut di Kalimantan, sehingga penanganan yang tepat dapat ditentukan untuk mengatasi permasalahannya. Studi kasus pada penelitian ini adalah tanah gambut di Bereng Bengkel, Palangkaraya. Karakteristik tanah gambut diidentifikasi melalui serangkaian pengujian tanah berdasarkan Peat Testing Manual 1979. Selain itu, dilakukan juga pengujian Scanning Electron Microscopy untuk melihat morfologi tanah gambut, serta pengujian Fourier Transform Infra-Red untuk mengidentifikasi jenis senyawa yang terdapat di dalamnya. Hasil pengujian tanah di laboratorium menunjukkan bahwa tanah gambut memiliki sifat yang buruk secara geoteknik. Dari hasil pengujian SEM, diketahui adanya makropori dan mikropori pada tanah gambut yang sebagian besar ditempati oleh air. Kemudian, berdasarkan hasil pengujian FTIR, diketahui bahwa tanah gambut memiliki senyawa yang bersifat hidrofilik. Kata kunci: tanah gambut, serat gambut, infrastruktur Abstract Indonesia is one of the countries with a wide distribution of peatlands. Peat is known as a problematic soil in construction work because it has a low bearing capacity that cannot support infrastructure foundations. The objective of this research is to analyze the characteristics of peat soils in Kalimantan, so that appropriate treatments can be determined to overcome the problem. A case study of this research is the peat soil in Bereng Bengkel, Palangkaraya. The characteristics of the peat soil were identified through a series of soil tests based on the Peat Testing Manual 1979. In addition, Scanning Electron Microscopy testing was carried out to look at the morphology of the peat soil, as well as Fourier Transform Infra-Red testing to identify the types of compounds contained therein. The results of soil testing in the laboratory showed that the peat soil had poor geotechnical properties. SEM testing revealed macropores and micropores in the peat soil, most of which were occupied by water. FTIR testing showed that peat soil has hydrophilic compounds. Keywords: peat soil, peat fiber, infrastructure
Pengaruh Cracked Soil terhadap Stabilitas Lereng Desa Bojongkondang-Kabupaten Sumedang dengan Menggunakan Software Geostudio Dewi Amalia; Ratu Salma Nisrina; Yackob Astor; Antonius Siswanto; Nursyafril Nursyafril; Iman Ruchyat; Apip Pudin
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 1 (2024): Volume 14 Nomor 1, Maret 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i1.1023

Abstract

Abstrak Tanggal 9 Januari 2021, terlah terjadi bencana alam tanah longsor terjadi di Dusun BojongKondang, Desa Cihanjuang, Kec. Cimanggung, Kab. Sumedang. Keberadaanya masyarakat di zona merah sangat berbahaya. Ditambah dengan kondisi lereng yang relative curam sehingga perlu dilakukan studi terhadap stabiltas lereng untuk mengetahui faktor keamanan (SF) dari lereng tersebut. Pemukiman disekitar lokasi bencana alam tanah longsor dapat dikatakan aman jika nilai factor keamanan (safety factor) lerengnya >1,5. Dilakukan analisis terhadap pemodelan keretakan tanah untuk mendapatkan faktor keamanan terkritis di mana tanah dimodelkan sebagai tanah pasir (behaving like sand). Hal ini dapat diselesaikan dengan mengaplikasikan The Concept of Cracked Soil. Penelitian mengenai keretakan tanah baru dilakukan 10 tahun terakhir. Selanjutnya dilakukan penelitian dengan melakukan kajian lapangan untuk menemukan posisi retakan di lereng, dan pada tahun 2020 dilakukan pemodelan analisis numeric untuk stabilitas lereng dalam kondisi retak. Kata kunci: Stabilitas Lereng, Tanah Longsor, Behaving Like Sand   Abstract On January 9 2021, a landslide occurred in BojongKondang Hamlet, Cihanjuang Village, Cimanggung District, Sumedang Regency. The existence of people in the red zone is very dangerous. coupled with the relatively steep slope conditions. Based on these conditions, it is necessary to carry out a slope stability analysis study to find out what the safety figure (SF) of the slope is. Settlements close to landslide disaster locations can be said to be safe if the slope safety factor is >1.5. In the analysis, modeling of soil cracks was also carried out to obtain the value of the critical safety factor by modeling the soil as behaving like sand. This problem can be solved by applying The Concept of Cracked Soil. Research related to crack soil has only been carried out in the last 10 years. The next research was a field study to find the position of cracks on the slope, and finally in 2020 numerical analysis modeling was carried out regarding slope stability in cracked conditions. Keywords: Landslides, Slope Stability, Behaving Like Sand
Analisis Keterlambatan Proyek Terhadap Cost Overruns Berbasis Project Risk Management Pada Proyek Pembangunan Infrastruktur Pabrik NPK Chemical PT Pupuk Iskandar Muda teuku ikmal; Wesli Wesli; Maizuar Maizuar; Khairullah Khairullah; Hamzani Hamzani
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 1 (2024): Volume 14 Nomor 1, Maret 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i1.1034

Abstract

Abstrak Proyek Pembangunan Pabrik NPK Chemical di PT PIM mengalami keterlambatan significant sehingga terjadi cost overrun. Penelitian ini untuk mengetahui banyaknya faktor risiko paling dominan dengan pendekatan Project Risk Management. Metode penelitian menggunakan metode deskriptif kuantitatif dengan menyebarkan kuesioner kepada personil di proyek Pabrik NPK Chemical PT PIM. Data kuesioner diolah menggunakan programming SPSS. Setelah itu, dilakukan analisis penilaian risiko untuk memperoleh risiko keterlambatan yang dominan. Hasil penelitian menunjukkan faktor risiko kategori œhigh risk sebanyak 31 risiko atau berkontribusi sebesar 84,67%. Adapun 5 faktor risiko dominan penyebab keterlambatan proyek yaitu: Pengiriman material tidak sesuai sequential di lapangan; Mismanagement project Kontraktor; Keterlambatan karena pekerjaan subkontraktor; Mobilisasi sumberdaya yang lambat; serta Koordinasi dan komunikasi yang tidak baik antar bagian dalam organisasi kerja Kontraktor sehingga tidak dapat mengelola interface pekerjaan. Kata kunci: Keterlambatan Proyek, Cost Overrun, Project Risk Management   Abstract The NPK Chemical Plant Construction Project at PT PIM experienced significant delays resulting in cost overrun. This study is to determine the number of most dominant risk factors with the Project Risk Management approach. The research method used quantitative descriptive methods by distributing questionnaires to personnel at PT PIM's NPK Chemical Plant project. Questionnaire data is processed using SPSS programming. After that, a risk assessment analysis is carried out to obtain the dominant risk of delay. The results showed that the risk factors in the "high risk" category were 31 risks or contributed 84.67%. The 5 dominant risk factors that cause project delays are: Material delivery is not in accordance with sequential in the field; Mismanagement of the Contractor's project; Delays due to the work of subcontractors; Slow resource mobilization; and Poor coordination and communication between parts of the Contractor's work organization so that they cannot manage the work interface. Keywords:   Project Delay, Cost Overrun, Project Risk Management
Analisis Life Cycle Cost dan Kelayakan Investasi pada Bangunan Rumah Tinggal Permanen Tipe 27 m2 Merzy Mooy; Mohamad Alfian Afu; Gregorius Paus Usboko; Agustinus H Pattiraja
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 1 (2024): Volume 14 Nomor 1, Maret 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i1.1037

Abstract

Abstrak Analisis life cycle cost bertujuan untuk mengetahui biaya siklus hidup bangunan, mulai dari perencanaan hingga umur ekonomis bangunan yang ditetapkan, dan untuk mengetahui nilai kelayakan investasi bangunan rumah tinggal. Penelitian dilakukan dengan menganalisis life cycle cost pada bangunan rumah tinggal permanent tipe 27 m2 Liliba, Kupang. Diketahui total biaya yang dikeluarkan dari perencanaan hingga umur ekonomis bangunan selama 20 tahun sebesar Rp. 4.086.724.673,08 meliputi biaya awal atau biaya pembangunan sebesar Rp. 1.554.805.606,39 (38%), biaya operasional sebesar Rp. 2.028.045.197,62 (50%), biaya perawatan dan penggantian sebesar Rp. 348.393.308,43 (8%) dan biaya pembongkaran sebesar Rp. 155.480.560,64 (4%) serta hasil analisis kelayakan investasi dengan menggunakan metode NPV (net present value), IRR (internal rate of return), dan BCR (benefit cost ratio) diperoleh nilai NPV sebesar Rp. 9.281.471.286 (NPV > 0)  atau NPV bernilai positif, nilai IRR sebesar 38,93% > MARR 38% dan nilai BCR > 1 sehingga investasi tersebut dianggap layak atau menguntungkan. Kata kunci: Life cycle cost, net present value, internal rate of return, basic cost rate, kelayakan investasi   Abstract Life cycle cost analysis is a method to determine life cycle cost of building from preliminary design to economical building life that can be intended by investment feasibility value of residential building. This research is about life cycle cost analysis of a permanent residential building type 27 m2, Liliba, Kupang. Total cost of this building calculated from design phase to economical building life for 20 years is about Rp. 4.086.724.673,08 that involve initial cost about Rp. 1.554.805.606,39 (38%), operational cost about Rp. 2.028.045.197,62 (50%), maintenance cost Rp. 348.393.308,43 (8%) and demolition cost Rp. 155.480.560,64 (4%). Results shows that the investment feasibility analysis using NPV method (net present value) is positive Rp. 9.281.471.286 (NPV > 0) , IRR (internal rate of return) is 38,93% > MARR 38%, and BCR (benefit cost ratio) is > 1. Hence, the investment can be concluded as feasible and profitable. Keywords: Life cycle cost, net present value, internal rate of return, basic cost rate, investment feasibility
Analisis Perubahan Hidrograf Aliran Akibat Konversi Tutupan Lahan DAS Keureuto Alief Muhammad Rishaq; Syarifah Asria Nanda; Fadhliani Fadhliani; Nanda Savira Ersa; Nura Usrina; Dio Syahlung Azra; Rama Budi
Teras Jurnal : Jurnal Teknik Sipil Vol. 14 No. 1 (2024): Volume 14 Nomor 1, Maret 2024
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v14i1.1038

Abstract

Abstrak Perubahan tata guna lahan akibat peningkatan jumlah penduduk mengakibatkan bertambahnya area pemukiman. Meningkatnya kebutuhan manusia terhadap tempat tinggal dan aktivitas lainnya menyebakan terjadinya beberapa permasalahan lingkungan semakin kompleks. Apabila keadaan ini berlangsung secara terus menerus maka menyebabkan menurunnya kemampuan tanah dalam menyerap dan menampung air hujan terutama di kawasan DAS Krueng Keureuto. Tujuan Penelitian ini adalah mengetahui seberapa besar perubahan tata guna lahan terhadap perubahan hydrograph aliran pada Sub DAS Krueng Keureuto. Data yang digunakan adalah data DEMNAS dan data citra satelit landsat 8 tahun 2015 dan 2021. Berdasarkan peta tata guna lahan tahun 2015 dan 2021, terjadi penambahan luas area ladang sebesar 4,75%, pemukiman 6,34%, perkebunan 11,83%, semak belukar 5,75%, dan sungai 0,21%. Adapun area yang mengalami penurunan luas yaitu hutan sebesar 27,67% dan sawah 1,21%. Hal ini berdampak pada laju limpasan permukaan dan besarnya debit aliran sungai yang terpantau pada outlet DAS Krueng Keureuto. Kata kunci: tata guna lahan, daerah aliran sungai, keureuto   Abstract Increasing human needs for housing and other activities have resulted in several complex environmental problems, such as a decrease in the soil capacity to absorb and hold rainwater, especially in the Krueng Keureuto watershed area. The aim of this research is to determine how much land use changes have affected changes in the flow hydrograph in the Krueng Keureuto Sub-watershed. The data used is DEMNAS data and Landsat 8 satellite image data for 2015 and 2021. Based on the 2015 and 2021 land use maps, there has been an increase in the area of fields (4.75%), residential (6.34%), plantations (11.83%), bushes (5.75%), and rivers (0.21%). Meanwhile, the area that experienced a decrease was forest (27.67%) and rice fields (1.21%). This has an impact on the rate of surface runoff and the magnitude of river flow discharge monitored at the outlet of the Krueng Keureuto watershed. Keywords: land use change, watershed, keureuto

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