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All Journal Jurnal Ilmu Pertanian Indonesia J-Sil (Jurnal Teknik Sipil dan Lingkungan) Bumi Lestari Jurnal Ilmu Lingkungan Teknotan: Jurnal Industri Teknologi Pertanian Jurnal Keteknikan Pertanian JURNAL ANALISIS KEBIJAKAN KEHUTANAN Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Ecogreen Jurnal Rekayasa Sipil Jurnal Irigasi LIMNOTEK - Perairan Darat Tropis di Indonesia Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) JUTEKS Jurnal Sosial Ekonomi Pekerjaan Umum JURNAL TEKNIK HIDRAULIK JURNAL SUMBER DAYA AIR JuTEkS (Jurnal Teknik Elektro dan Sains) International Journal Engineering and Applied Technology (IJEAT) J-Sil (Jurnal Teknik Sipil dan Lingkungan)
Asep Sapei
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Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Transportation Other

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Kajian Kapasitas Lentur Balok Beton Bertulangan Bambu Petung Nuraeni, Reni; Widyarti, Meiske; Sapei, Asep
Jurnal Teknik Sipil dan Lingkungan Vol. 3 No. 1: April 2018
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.3.1.49-58

Abstract

Reinforced concrete generally use steel reinforce material. Steel is quarry material that someday be exhausted and relatively high price. Hence,need to find the substitution material which a more affordable with the structure power that equivalent. Bamboo can be assessed solution as a substitution material of steel reinforce. This research looked at a bending capacity of the bamboo petung  reinforce concrete beams with notch is 2 cm and 3 cm. The sectional form of the reinforce bamboo of arch ( 1 / 4 ) circle and  ( 1 / 2 ) circle.  Tensile testing sample of bamboo obtained average value of bamboo tensile strength  is 288.81 mpa .A mixture of concrete f‘c = 17.5 MPa with the mixtures by virtue of SNI 7394-2008 .The  testing results of compressive strength at the age of 3 days concrete 9.837 MPa . Sample  beams made about 9 type reinforcement .From the flexural testing at the age of 28 days type reinforcement TB4 have flexural strength of 10.167 MPa value flexural approach strength  steel reinforcement beams of 12.00024 Mpa.Keywords : bamboo petung, flexural beams, reinforcement bamboo
Analisis Potensi Air Sungai Pada Embung 190 Di PG. Bungamayang PTPN VII, Lampung Tarigan, Melvin Classy Alexander; Sapei, Asep
Jurnal Teknik Sipil dan Lingkungan Vol. 3 No. 2: Agustus 2018
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.3.2.77-84

Abstract

Air merupakan elemen yang sangat penting bagi keberlanjutan hidup makhluk hidup setiap harinya. Air juga digunakan untuk irigasi pertanian. Penelitian ini bertujuan untuk menganalisis potensi air sungai di PG. Bungamayang PTPN VII, Lampung. Penelitian ini terbatas pada embung 190 PG. Bungamayang PTPN VII yang merupakan bagian dari DAS Tulang Bawang yang secara geografi terletak pada 104° 52' 07" BT dan 04° 35' 24" LS. Pada penelitian ini, analisis SWAT dilakukan menggunakan ArcSWAT 2012 sebagai plug-in pada ArcGIS 10. Pada simulasi ini, terdapat 4 tahapan proses, yaitu delineasi daerah DAS, pembentukan HRU, pengolahan data dan simulasi SWAT, serta proses visualisasi. Untuk proses validasi, digunakan perbandingan antara debit simulasi SWAT dengan debit observasi dari tanggal 20 Maret hingga 5 April 2014. Hasil simulasi SWAT menunjukan debit rata-rata sebesar 0.066 m3/s. Sedangkan untuk debit observasi, diperoleh debit rata- rata sebesar 0.043 m3/s dengan koefesien korelasi sebesar 0,897. Potensi air sungai dapat ditunjukan dengan debit rataan tahunan permodelan SWAT dengan debit rataan maksimum tahunan sebesar 0.143 m3/s pada bulan April and debit rataan minimum tahunan sebesar 0.018 m3/s yang terjadi pada bulan Septembar sehingga diperoleh total potensi air sungai pada Embung 190 di PG Bungamayang PTPN VII, Lampung sebesar 2 373 950.55 m3 tiap tahunnya.Kata kunci: DAS Tulang Bawang, HRU, potensi air sungai, SWAT
Pemampatan Tanah Lunak pada Berbagai Kedalaman Prefabricated Vertical Drain di Reklamasi Pelabuhan Belawan, Kota Medan: Compaction of Soft Soil at Various Depths Prefabricated Vertical Drain in The Reclamation of Belawan Port, Medan City Iskandar, Kamal Hasan; Sapei, Asep
Jurnal Teknik Sipil dan Lingkungan Vol. 7 No. 1: April 2022
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.7.1.1-16

Abstract

Proyek reklamasi Pelabuhan Belawan tahap II direncanakan sebagai area penyimpanan kontainer. Berdasarkan tes penyelidikan tanah (SPT test), tanah pada lokasi ini diklas-ifikasikan sebagai tanah lunak dengan kedalaman 11 m. Oleh karena itu, penting untuk meningkatkan stabilitas tanah karena tanah tersebut memiliki kompresi potensial yang besar. Metode yang digunakan adalah Preloading dan Prefabricated Vertical Drain (PVD). Kedalaman PVD yang dipilih memiliki perbedaan dampak dan pengaruh terhadap performansinya. Penelitian ini dilaksanakan untuk menentukan kedalaman PVD yang optimum untuk menahan kompresi dan waktu setlemen dengan derajat konsolidasi sebesar 90%. Variasi kedalaman PVD yang digunakan adalah 0%, 25%, 50%, 75% dan 100% dari kedalaman tanah. Hasil analisis menunjukkan bahwa lokasi yang potensial terjadi subsiden adalah 2.4 m. Tanpa PVD, membutuhkan waktu 50.670 hari untuk mencapai 90% konsolidasi. Sedangkan dengan PVD, hanya membutuhkan 66-69 hari tergantung dari prosentase kedalaman PVD. Semakin dalam PVD, semakin kecil kom-presi residunya. Kedalaman 50% PVD merupakan yang optimum berdasarkan waktu dan residu kompresi dengan total biaya sebesar Rp 7,09 Milyar.
Kinerja Program Soil and Water Assessment Tools (SWAT) yang Dimodifikasi untuk Menduga Debit Sub-DAS Cimanuk Hulu Dzulfiqar, Muhammad Fakhri; Sapei, Asep
Jurnal Teknik Sipil dan Lingkungan Vol. 8 No. 3: Desember 2023
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.8.03.157-166

Abstract

Soil and Water Assessment Tool (SWAT) merupakan sebuah model hidrologi yang dikembangkan di Amerika Serikat untuk menganalisis dampak dari perubahan tata guna lahan terhadap hasil air (debit) dan sedimentasi. Model ini telah banyak diterapkan di Asia. Akan tetapi, neraca air di dalam model SWAT menggunakan neraca air untuk tanaman yang ditanam pada lahan kering (up land) termasuk tanaman padi. Di Asia, khususnya di Indonesia, tanaman padi umumnya ditanam di lahan sawah. Untuk menyesuaikan dengan kondisi lahan sawah, model SWAT telah dimodifikasi dengan mengacu kepada algoritma sawah yang dikembangkan oleh Sakaguchi et.al. (2014). Penelitian ini bertujuan untuk mengevaluasi kinerja model SWAT yang dimodifikasi untuk menduga debit Sub-DAS Cimanuk Hulu yang bersawah. Hasil evaluasi menunjukkan bahwa model SWAT yang dimodifikasi dapat menduga debit relative lebih baik dibandingkan dengan modul SWAT original (tanpa algoritma sawah) yang ditunjukkan oleh nilai determinasi (R2) dan Nash-Sutcliffe efficiency (NSE). Nilai R2 dari hasil kalibrasi model SWAT yang dimodifikasi, SWAT original lahan kering dan model SWAT pot-hole berturut-turut adalah 0.569, 0.494 dan 0.544. Sedangkan nilai NSE dari hasil kalibrasi model SWAT yang dimodifikasi, SWAT original lahan kering dan model SWAT pot-hole berturut-turut adalah 0.521, 0.420 dan 0.503
SWAT Model Performance on QSWAT Program to Predict Water Discharge in the Upper Citanduy Sub-watershed Akmal Ikhsan Maulana; Sapei, Asep
Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 1: April 2025
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.10.1.115-126

Abstract

The Citanduy Watershed is one of the largest watersheds on Java Island and is in critical condition. The Upper Citanduy Sub-watershed is the main sub-watershed in the Citanduy Watershed, which needs attention because it greatly affects the quantity and quality of its water. The Soil and Water Assessment Tool (SWAT) model, which is a hydrological model developed in the United States, can be used to predict the quantity of water. However, the water balance in the SWAT model uses the water balance for plants planted on dry land (up land) and is less suitable for watersheds that have rice fields (low land). For watersheds that have rice fields, pot hole and modified SWAT features have been tried and developed. This study aims to analyze the performance of the SWAT model with original features, pot hole features, and modified features in the QSWAT program to predict water discharge in the Upper Citanduy Sub-watershed. The results of the study indicate that the modified SWAT has the best performance compared to the original SWAT and pot-hole SWAT, as indicated by the NSE and R2 values. The NSE values of the original SWAT, pot hole SWAT, and modified SWAT were 0.70, 0.73, and 0.75, respectively. The R2 values of the modified SWAT, Original SWAT, and pot hole SWAT were 0.94, 0.93, and 0.94, respectively.
Analysis of Rainfall Duration in Dramaga–Bogor in relation to Drainage Infrastructure Planning Chessaramadhanty, Shaffadina Putry; Sapei, Asep; Prasetia, Rakhmat
Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.10.2.367-374

Abstract

Dramaga Subdistrict, Bogor Regency, is the only area in West Java with a Monsoon-1 zone of the Year-Round Rainfall (YRR) type with rainfall exceeding 150 mm/month. The combination of duration and high intensity is an important factor that affects peak discharge/flooding, which in turn determines the dimensions of drainage channels. This study aims to analyze the duration of rainfall in Dramaga - Bogor and other characteristics. The analysis was conducted based on data from the Automatic Agroclimate Weather Station (AAWS) for 2018-2024 at the Bogor Climatology Station. It was found that the duration of heavy and very heavy rainfall in Dramaga was mostly 2 hours.  In addition, the highest monthly rainfall in Dramaga occurred in November (419.63 mm/month), while the lowest was in June (107.36 mm/month). Most of the rainfall occurred between 13:00 and 18:00 WIB, with the peak rainfall between 16:00 and 19:00 WIB.
Kebijakan Pengembangan Budidaya Tanaman Bambu untuk Pengelolaan Berkelanjutan DAS Aesesa Flores Noywuli, Nicolaus; Sapei, Asep; H. Pandjaitan, Nora; Eriyatno, Eriyatno
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 9 No 4 (2019): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.9.4.946-959

Abstract

The existence of Aesesa Flores (AF) watershed is very important for people in Ngada and Nagekeo Regency of Flores island. The AF watershed provides water, land use, economic and other environmental services. However, the excessive exploitation is a major threat for the existence of the AF watershed. The degradation of the AF watershed function such as reduction in river debit, increase of critical land, land use change as well as the problem of poverty. The upstream area is intended as a conservation area where Watu Ata nature preservation park is located, the bamboo forest and Bajawa as the capital city of Ngada Regency. The downstream area is not only as capital city of Nageko Regency but also as paddy field area. One of the activity to improve the watershed function is through a comprehensive and sustainable management policy design based on characteristics and carrying capacity of the AF watershed. This research was conducted in April-May 2018 and the the purpose of the study is to analyzed key factors and establishing an alternative for sustainable management policy development of AF watershed using a prospective method. This study using mainly primary data obtained from the seven local experts through the filling of the questionnaire. The result shows that there are 22 attribute factors and it identified as 10 key factors. The main two key factors are bamboo cultivation, processing technology of bamboo, enlargement of bamboo cultivation area and practicing the soil and water conservation technique. The 10 key factors then become input for designing the management policy of AF watershed. Bamboo become the dominant and key factor because bamboo could be developed into biomass energy plant and it serves social, economic and ecological values for the local people of Ngada and Nagekeo Regency. Bamboo cultivation has a good prospect financially for the local people.
Design of Water Source Alternative Based on SWAT Model Simulation Pandjaitan, Nora Herdiana; Afifi, Arif Yusron; Sapei, Asep
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 11 No. 4 (2022): Desember 2022
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v11i4.636-646

Abstract

Water shortage problem was often happened in many places in Indonesia. Water availability is very important not only for domestic needs, but also for other activities particularly for agricultural activities. To solve water shortage problem, this study aimed to design a water source alternative. The rain is a free water source and collecting rain in the small dam or reservoir is one of the effective rainwater harvesting technique that can increase water availability. This research was conducted  at Sekaran Village and the analysis had done using SWAT (Soil and Water Assessment Tools) model.  The planned rainfall and discharge were analysed by 5 years return period to calculate the water  potential for reservoir charging. The results of this study indicated that the location of the reservoir was planned in a forest area with a slope of 8-25%, on coordinates 111º38'11.39"E and 7º6'14.22"S and has a storage volume of 13737 m3. The reservoir has 4356 m2 surface area with a depth of 3 m. Based on the SWAT model simulation, the highest average discharge potential occured in February with a discharge of 0.312 m3/s and the lowest average discharge occured in October with a discharge of 0.044 m3/s. The total volume of potential annual water that can fill the reservoir is 61.166 m3/s per year based on a planned rainfall of 115.38 mm and a planned flood discharge of 2.54 m3/s with a return period of 5 years. The reservoir construction required a cost of  IDR 1,200,747,000. Keywords: Cost, Location, Rainwater Harvesting, Reservoir, SWAT
Avoiding Flood by Improving Cross-Sectional Capacity through River Normalization Harits, Muzhaffar; Sapei, Asep; Pandjaitan, Nora Herdiana
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 13 No. 4 (2024): December 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i4.1023-1035

Abstract

Bekasi is one of the regions in Indonesia that often suffer from flooding. To overcome flooding problems in the Bekasi area, the Ciliwung Cisadane River Basin Center has begun a normalization project along the Bekasi River. This research aimed to evaluate the Bekasi River's cross-sectional capacity both before and after normalization. The analysis focused on the section where the Cileungsi and Cikeas rivers converge to the Bekasi weir. In this research, secondary data were employed, such as national digital elevation model data, detailed engineering designs of Bekasi River flood control activities, and rainfall data from the Cibinong Station that covers the period from 2006 to 2020. The result from planned flood discharge with the Nakayasu synthetic unit hydrograph method for a return period of 25 years on the Bekasi River was obtained at 665.81 m3/s. The results of hydraulic analysis before normalization with the HEC-RAS application show that flooding occurred at 102 out of 116 stations, with capacities of river cross-sections ranging from 453.49 m³/s to 665.71 m³/s at these overflow stations. Following the river normalization process, the cross-sectional capacity at all Bekasi River stations can accommodate flood discharge without any instances of overflow.Keywords: Flood, HEC-RAS, Nakayasu, Normalization, Rainfall.
Embung Development for Palm Oil Industry Water Supply Based on Soil Water Assessment Tools Harits, Muzhaffar; Sapei, Asep; Pandjaitan, Nora Herdiana
JURNAL SUMBER DAYA AIR Vol 21, No 2 (2025)
Publisher : Direktorat Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jsda.v21i2.983

Abstract

The water supply at the IPB Education and Research Garden Jonggolis generally sourced from rainfall. This can lead to water shortage during certain periods, so building a water storage structure such as a small reservoir (embung) is necessary. The embung can provide a more stable water supply by storing rainwater and river inflow. This research aims to design an embung at the IPB Education and Research Garden Jonggol, and to analyze the water balance of the planned embung. This study presents the application of SWAT-based dependable discharge analysis for small-scale industrial reservoirs in tropical regions. The findings support sustainable water management and enhance enhance agro-industrial resilience, particularly in regions dependent on rainfall. The planned embung is designed for the palm oil processing plant with a total water requirement of 8,786 m3 in the dry season. Dependable discharge analysis is conducted using Soil Water Assessment Tool (SWAT), while flood discharge analysis uses the rational method. Embung capacity design is based on water availability, water requirement, sediment volume, and total evaporation. The planned embung will be located at coordinates 107° 2' 10.53" E and 6° 28' 17.60" S. It features a normal water surface area of 7,737.19 m², a normal water depth of 3 m, and a total storage volume of 9,947.76 m³. The design includes essential components such as an overflow channel, an outlet channel, and an embankment. The water balance indicates that the embung will begin filling in February and remain full from March to May. Subsequently, the water balance is expected to repeat its cycle consistently, ensuring that the embung can meet the water demand at the location.
Co-Authors . Erizal ., Apip Afifi, Arif Yusron Ahmad Fausan Akmal Ikhsan Maulana Allen Kurniawan Arif Yusron Afifi Arya Hadi Dharmawan Chessaramadhanty, Shaffadina Putry D.S, Made Desrial Dewi, Endang Purnama Dzulfiqar, Muhammad Fakhri E. Namaken Sembiring Eriyatno . Erizal , Gatot Pramuhadi Hariansyah, M. Harits, Muzhaffar Hermawan, FX Irma Kusmawati Iskandar, Kamal Hasan Kamal Hasan Iskandar M Yanuar J. Purwanto M. Hariansyah M. Yanuar J Purwanto M. Yanuar J. Purwanto M. Yanuar J. Purwanto M. Yanuar J. Purwanto Made D.S Maulana Ibrahim Rau Meiske Widyarti Meiske Widyarti Melvin Classy Alexander Tarigan Muhammad Fauzan Muhammad Hasjim Bintoro Djoefrie Hasjim Bintoro Djoefrie Muzhaffar Harits Namaken Sembiring Nicolaus Noywuli Niels vuegen Niels vuegen Nora H. Pandjaitan Noywuli, Nicolaus Prasetia, Rakhmat R. P.A, Setiawan Radite Pas Reni Nuraeni Reni Nuraeni, Reni Ridwan Adi Surya Said Karim Saputri, Utamy Sukmayu Sayed Ahmad Fauzan Sayed Ahmad Fauzan Sayed Ahmad Fauzan, Sayed Ahmad Setiawan R. P.A Soeharsono - Sutoyo Tarigan, Melvin Classy Alexander Tieneke Mandang Utami, Nurya Wawan Hermawan Widiatmaka Yazid Ismi Intara Yuli Suharnoto Zuzy Anna