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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Teknik Sipil International Conference on Engineering and Technology Development (ICETD) Jurnal Pengabdian Kepada Masyarakat Sakai Sambayan Jurnal Rekayasa Journal of Degraded and Mining Lands Management Jurnal Rekayasa Sipil dan Desain Jurnal Teknik Sipil Briliant: Jurnal Riset dan Konseptual Teras Jurnal Civil Engineering Dimension SIKLUS: Jurnal Teknik Sipil Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Journal of Engineering and Scientific Research (JESR) Publikasi Riset Orientasi Teknik Sipil (Proteksi) JURNAL HUTAN TROPIS JUSTICIA SAINS: Jurnal Ilmu Hukum Jurnal Sipil Terapan Jurnal Meteorologi dan Geofisika Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Nemui Nyimah
Dyah Indriana Kusumastuti
Jurusan Teknik Sipil Fakultas Teknik Universitas Lampung Jl. Sumantri Brojonegoro No.1 Bandar Lampung.
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Analisis Hidrograf Satuan Terukur Sub DAS Way Besai Astriyana, Mega; Kusumaastuti, Dyah Indriana; Purwadi, Ofik Taufiq
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 2 (2016): Edisi Juni 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i2.369

Abstract

Way Besai River is the largest river in west lampung district. High sedimentation in this riveraffects the performance of Hydroelectic Power Plant (HEPP) owned by PLN which is located inWay Besai River. In order to know the condition of Way Besay’s catchment area, a research isconducted on each of Way Besai’s sub catchment area. One of the sub catchment area is located inTalang Bandung Village, Pekon Sindang Pagar, Kel Tugu Sari Kec Sumber Jaya West LampungDistrict named Talang Bandung Catchment and Air Anak Catchment. In order to make the surveyof Catchments condition easier, the research uses measured unit hydograph analysis method. Thepurpose is to analyse the measured unit hydograph in order to get the value of Peak Discharge,Peak time, basic time, and analysing the flood hydrograph.In this researc the data needed are automatic rainfall data, automatic water level data, velocitydata, and the stream cross section. From these data will be used to make Rating Curve to turn thehydrograph of water level into flow hydrograph. The separation of the components of base flowand direct runoff using straight-line approach and calculate the efective rainfal to get the ordinateof unit hydrograph. From the average of unit hydrograph combined with periodic rainfall willobtain the periodic flood hydrograph.From the analysis result it is, obtained an average of hydrograph unit for each catchment area. On60 minutes period, the average of unit hydrograph of Air Anak Catchment and Talang BandungCatchment have average peak discharge average (Qp) of 0,340 m 3 /sec and 0,394 m 3 /sec, the timeof rise are 560 minutes and 660 minutes. The result shows that for return period of 25 years, flooddischarge for Air Anak is 16,832 m 3 /sec and for Talang Bandung is 20,179 m 3 /sec.Keywords: Measured Unit Hydrograph Analysis, Sub Catchment Area of Way Besai.
Analisis Pembangkit Listrik Tenaga Mikro Hidro (PLTMH) Studi Kasus : Sungai Air Anak (Hulu Sungai Way Besai) Dwiyanto, Very; Kusumastuti, Dyah Indriana; Tugiono, Subuh
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 4 No. 3 (2016): Edisi September 2016
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v4i3.424

Abstract

This research was conducted in order to calculate the reduction in electrical power that can be generated by a micro-hydro power plant in Air Anak river. The decline in power at the micro-hydro power plant Air Anak river is caused by the presence of sediments that accumulate in the weir micro-hydro power plants, so that reduced water storage that can be streamed to a penstock pipe to generate electrical power. In this study, carried out calculations mainstay river discharge Air Anak by comparison mainstay river discharge Way Besai obtained from the data processing streamflow recorder at the hydroelectric plant reservoirs Way Besai for 11 years from 2004 to 2014 using the Flow Duration Curve method, calculation of electric power generated from the design discharge on micro-hydro power plant Air Anak, calculation of reduction in electrical power at the micro-hydro power plant Air Anak. From the research, design discharge value obtained micro-hydro power plant Air Anak is equal to 0,2565 m3/s with power generated by 2,1962 kW. Power reduction is calculated based on measurements taken 2 times. In streamflow measured at 1,1923 m3/s, water can flow into the pipe by 7 cm generate a discharge of 0,0592 m3/s. Power that can be generated at 1,2326 kW or by 56,12 % of the generated design power. In streamflow measured at 0,5788 m3/s, water can flow into the pipe by 4 cm generate a discharge of 0,0189 m3/s. Power that can be generated at 0,4062 kW or by 18,50 % of the generated design power. Keywords : micro hydro, flow duration curve, electricalpower
Analisis Hidrologi dan Hidrolika pada Saluran Drainase Ramanuju Hilir Kotabumi (Menggunakan Program HEC-RAS) Mustofa, Muhammad Jazuli; Kusumaastuti, Dyah Indriana; Romdania, Yuda
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 3 No. 2 (2015): Edisi Juni 2015
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v3i2.461

Abstract

The calculation is done using the rainfall data obtained from BMKG Kotabumi North Lampung,from 1998 until 2011 with time increment in minutes. The Log Pearson III method is used to findthe design rainfall with return period 2 years, 5 years and 10 years. Then the result isimplemented in the Intensity-duration-frequency (IDF) curves. Time of concentration is linked intothe IDF curves to determine rainfall intensity. Based on the calculated rainfall intensity, thedesign discharge for each return period can be calculated using the rational method.The values of design discharge are then inputted as upstream boundary condition in HEC-RAS.Model output are presented in cross and long section to determine at which return period thedrainage capacity is overflowed. Simulation using HEC-RAS were also done to determine thechannel capacity.Based on the results of this research, it can be concluded that rainfall intensities are 52,6918mm/hour, 65,7820 mm/hour and 75,9032 mm/hour, for 2, 5, an 10 year return period respectively.The capacity of the drainage channel is 2.02 m 3 /hour and is expected to be exceeded on 5 yearsreturn period.Key words : Intensity, Rasioanal method, HEC-RAS, capacity
Analisis Hidrologi Untuk Penentuan Debit Banjir Rancangan di Bendungan Way Besai Nivitha, Mutya; Winarno, Dwi Joko; Kusumastuti, Dyah Indriana
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 5 No. 2 (2017): Edisi Juni 2017
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v5i2.785

Abstract

AbstractResource which is often used for energy source is water as hydro power plant. One of hydro power plant in Lampung province is Way Besai Hydro Power Plant. Considering the importance of this hydro power plant for people, extreme things on the hydro power plant like flood, certainly not desirable. Hydrologic analysis required for get result that was flood design as action anticipation.This study was conducted in Way Besai watershed, Sumber Jaya, West of Lampung. The data required of this study are rainfall data from five stations, flow Way Besai data from 1986 to 2000, and daily rainfall data from two station.From frequency analysis, obtained design flood for the largest single data group return period of 2 years is return period 5 years 131,00 m3/s, return period 10 years 178,42 m3/s, return period 25 years 253,71 m3/s, return period 50 years 322,66 m3/s, return period 100 years 403,45 m3/s, and 499,81 m3/s for return period 200 years. From HEC-HMS, the flood design for return period 2 years sebesar 71,2 m3/s, return period 5 years 90,6 m3/s, return period 10 years 105,7 m3/s, return period 25 years 128,6 m3/s, return period 50 years 156,6 m3/s, return period 100 years 190,8 m3/s and 233,7 m3/s for return period 200 years. Based on calibration result used RMSE, obtained RMSE value is 3,12. Keywords: watershed, design flood, Way Besai, HEC-HMS
Analisis Hidrologi Untuk Penentuan Debit Banjir Rancangan di Bendungan Way Besai Nivitha, Mutya; Winarno, Dwi Joko; Kusumastuti, Dyah Indriana
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 6 No. 1 (2018): Edisi Maret 2018
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v6i1.791

Abstract

AbstractResource which is often used for energy source is water as hydro power plant. One of hydro power plant in Lampung province is Way Besai Hydro Power Plant. Considering the importance of this hydro power plant for people, extreme things on the hydro power plant like flood, certainly not desirable. Hydrologic analysis required for get result that was flood design as action anticipation.This study was conducted in Way Besai watershed, Sumber Jaya, West of Lampung. The data required of this study are rainfall data from five stations, flow Way Besai data from 1986 to 2000, and daily rainfall data from two station.From frequency analysis, obtained design flood for the largest single data group return period of 2 years is return period 5 years 131,00 m3/s, return period 10 years 178,42 m3/s, return period 25 years 253,71 m3/s, return period 50 years 322,66 m3/s, return period 100 years 403,45 m3/s, and 499,81 m3/s for return period 200 years. From HEC-HMS, the flood design for return period 2 years sebesar 71,2 m3/s, return period 5 years 90,6 m3/s, return period 10 years 105,7 m3/s, return period 25 years 128,6 m3/s, return period 50 years 156,6 m3/s, return period 100 years 190,8 m3/s and 233,7 m3/s for return period 200 years. Based on calibration result used RMSE, obtained RMSE value is 3,12. Keywords: watershed, design flood, Way Besai, HEC-HMS
Sediment Analysis in the Way Besai Hydroelectric Watershed Using the USLE Method (United Soil Loss Equation) Rahmawati, Fitriya; Winarno, Dwi Joko; Kusumastuti, Dyah Indriana
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 6 No. 4 (2018): Edisi Desember 2018
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v6i4.1018

Abstract

Way Besai hydropower station is located in Way Besai river basin (watershed) with most watersheds surrounded by mountains that cause erosion resulting in sediment buildup. The purpose of this research is to know the degree of erosion hazard and to know the sediment by the Universal Soil Loss Equation (USLE) method in Way Besai Watershed. The location of this research was conducted at Way Besai Sub River Watershed, Tulang Bawang Watershed, West Lampung Regency with Way Petai as the control point. The data needed in this research is the limitation of Way Besai Watershed catchment, land use data and land type at Way Besai Watershed catchment area. From the result of sedimentation analysis with USLE method, it can be known that the erosion rate of Way Besai Watershed catchment area is 305.03 ton/ha/year which is classified as Class IV Hazard Erosion or heavy and sedimentation of Way Besai Watershed catchment area is 165.079,13 ton/year.
Analisis Perbandingan Hidrograf Satuan Sintetik Gama I dan SCS (HEC-HMS) dengan Hidrograf Satuan Terukur di Sungai Way Besai Sembiring, Fadhel Dzaki; Kusumastuti, Dyah Indriana; Winarno, Dwi Joko
Jurnal Rekayasa Sipil dan Desain (JRSDD) Vol. 7 No. 1 (2019): Edisi Maret 2019
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jrsdd.v7i1.1117

Abstract

The Way Besai River is located in Sumber Jaya District, West Lampung Regency. River discharge is an indicator of watershed function in transforming rain into stream flow. River discharge is generally presented by hydrograph. There are two methods to derive unit hydrograph, i. e. Measured Unit Hydrograph method (HST) and Synthetic Unit Hydrograph method (HSS). Synthetic Unit Hydrograph is used if the watershed does not have sufficient hydrometry data for calculating flood discharge. The purpose of this study is to analyze Synthetic Unit Hydrograph Gama I, Synthetic Unit Hydrograph SCS (HEC-HMS), and measured unit hydrograph for Way Besai River. The method used in this study includes Synthetic Unit Hydrograph Gama I, Synthetic Unit Hydrograph SCS (HEC-HMS), and Measured Unit Hydrograph. The results of this study show that Unit Hydrograph derived from Synthetic Unit Hydrograph SCS (HEC-HMS) is better than the result derived from Synthetic Unit Hydrograph Gama I based on peak discharge, peak time, base time and base flow values. Keywords: Watershed, Discharge, Synthetic Unit Hydrograph, Measured Hydrograph Unit, SCS (HEC-HMS), Gama I.
Analisis Kelayakan Ekonomi Teknik Investasi Pembangunan Terminal Khusus dalam Mendukung Distribusi Tambang Batu Basalt Windy Putri Diwantari; Ahmad Herison; Kristianto Usman; Ahmad Zakaria; Dyah Indriana Kusumastuti
Teras Jurnal : Jurnal Teknik Sipil Vol. 15 No. 2 (2025): Teras Jurnal (September)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v15i2.1290

Abstract

Abstrak   Ketidakefisienan distribusi hasil tambang batu basalt melalui jalur darat mendorong pembangunan Terminal Khusus PT. Optima Nusa Tujuh guna mengoptimalkan distribusi melalui jalur laut. Penelitian bertujuan untuk menentukan skenario investasi paling optimal berdasarkan kelayakan finansial dan kontribusinya terhadap efisiensi distribusi. Metode yang digunakan adalah pendekatan deskriptif dengan teknik kualitatif dan kuantitatif. Analisis kualitatif digunakan untuk mengevaluasi aspek non-finansial, sedangkan analisis kuantitatif menilai kelayakan finansial berdasarkan parameter NPV, IRR, PI, BCR, BEP, dan PBP. Hasil evaluasi terhadap kelima skenario investasi menunjukkan bahwa seluruh skenario layak dilaksanakan dengan nilai NPV positif. Namun, hanya skenario moderat hingga optimis yang memenuhi seluruh kriteria kelayakan. Skenario 5 (optimis 20%) memberikan hasil paling optimal, dengan NPV sebesar Rp65.396.124.689,67, IRR sebesar 34,21%, dan periode pengembalian investasi tercepat selama 3 tahun 2 bulan 4 hari. Kesimpulannya, pendistribusian hasil tambang melalui terminal khusus jalur laut dinilai layak dan memberikan dampak positif secara finansial karena memberikan keuntungan jangka panjang dan efisiensi distribusi terbaik.   Kata kunci: studi kelayakan, terminal khusus, distribusi  basalt, NPV, IRR   Abstract   The inefficiency of basalt distribution via land transportation has prompted the development of a dedicated terminal by PT. Optima Nusa Tujuh to enhance maritime distribution. This study aims to determine the most optimal investment scenario based on financial feasibility and its impact on distribution efficiency. A descriptive method is employed, incorporating both qualitative and quantitative approaches. Qualitative analysis explores non-financial factors influencing project viability, while quantitative analysis evaluates financial feasibility using NPV, IRR, PI, BCR, BEP, and PBP. Analysis of five investment scenarios reveals that all are financially feasible with positive NPV values; however, only moderate to optimistic scenarios fulfill all feasibility criteria. Scenario 5 (20% optimistic) emerges as the most optimal, yielding the highest NPV of IDR 65,396,124,689.67, IRR of 34,21%, and the shortest payback period of 3 years, 2 months, and 4 days. In conclusion, maritime distribution via dedicated terminal is feasible and financially advantageous, ensuring long-term gains and efficient logistics.   Keywords: feasibility study, dedicated terminal, basalt distribution, NPV, IRR
Co-Authors Adenan Yusuf Afandi . Ahmad Herison Ahmad Zaenudin Ahmad Zakaria Ahmad Zakaria Ahmad Zakaria Ahmad Zakaria Aji Saputra, Aji Amanda, Tiara Maelta Amini, Rosidah Andandaningrum, Della Andriani, Gustin Anggraini, Witta Putri Anton, Sari Aprizal Arianti, Tanti Aristiani, Widya Asep Sukohar Astika Murni Lubis Astriyana, Mega Ayuningsih, Titik Bayu krishna mukti C.H. Van Rafii Candra Hakim Van Rafi’i Christine Wulandari Citra Dewi D. Jokowinarno Dwi Joko Winarno Dwi Joko Winarno Dwi Joko Winarno Dwi Joko Winarno Dwi Joko Winarno Dwi Joko Winarno Dwi Jokowinarno Dwi Jokowinarno Dwi Jokowinarno Dwiyanto, Very ELOK BUDI UTAMI Endro Prasetyo Wahono F. Yuniarti fadhel dzaki sembiring Falah, M. Najmul Fathony, Awal Rifan Febriyani, Febriyani Fieni Yuniarti Fitriya Rahmawati Fridayanto, Syahlan Naufal Gani, Rama Dian Gultom, Winda Maria Rebecca gustin andriani Hardito, Joni Haris Murwadi Hidayat, Kurnia Ryandani Humaidi Humaidi Humaidi Humaidi Humaidi, Humaidi Irwan Irwan Irwan Sukri Banuwa Irwan Sukri Banuwa Jundulloh, Panglima juwita novi yana Kristianto Usman kuncoro, wahyu hadi Kusanti, Nency Dwi M. Najmul Falah Mahardika, Siti Mardiyansyah Mardiyansyah Marfirah Ulfah Maulana Yusuf Maulana Yusuf Mega Astriyana Melya Riniarti Muhamad Angga Wicaksono Muhammad Jazuli Mustofa mukti, Bayu krishna Mustofa, Muhammad Jazuli Mutya Nivitha Nency Dwi Kusanti Nengah Sudiane Niken, Chatarina Nivitha, Mutya Nivitha, Mutya Nora Anggraini Noviani, Erina Nugraheni, Melly Nur Arifaini Ofik Taufik Purwadi Ofik Taufiq Purwadi Okta Ainita Panglima Jundulloh Peranginangin, Imanuel Purwadi , Ofik Taupik Purwadi, Ofik Taufiq Purwadi, Ofik Taupik putri, wardatul aini Rahmawati, Fitriya Rama Dian Gani Rian Alfian Riki Chandra Wijaya Riyo Ardi Yansyah Riyo Ardi Yansyah, Riyo Ardi Riza Muhida Robiyanto Robiyanto Robiyanto, Robiyanto Rosidah Amini S Suharno Samsul Bakri Saputro, Rifki Ananda Sari, Dwi Meyta Sembiring, Fadhel Dzaki Siti Nurul Khotimah Slamet Budi Yuwono Slamet Budi Yuwono Sri Ratna Sulistiyanti Subuh Tugiono Subuh Tugiono, Subuh Suharni Suharni Sumiharni . Suprayitno, Meli Susilowati A Syafri Adi Teguh Endaryanto Titik Ayuningsih Tomi, Muhammad Tommy Arisandy Triyanto Triyanto Ulfah, Marfirah Utami, Elok Budi Very Dwiyanto Wahono, Endro Prsetyo wahyu hadi kuncoro Wardatul Aini Putri Wicaksono, Muhamad Angga Widya Aristiani Wijaya, Riki Chandra Winarno, Dwi Joko Winda Maria Rebecca Gultom Windy Putri Diwantari Yana, Juwita Novi Yuda Romdania Yuda Romdania yulianto, alim Zaldi Ronald