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All Journal Jurnal Teknik Composite Journal Jurnal Teknik Sumber Daya Air Indonesian Journal of Construction Engineering and Sustainable Development
Barry Yusuf Labdul
Universitas Negeri Gorontalo
Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering

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OPTIMASI KOEFISIEN PARAMETER HIDROGRAF SATUAN SINTETIK ITB-1 DAN ITB-2 DI SUB DAS BIONGA KAYUBULAN Endrizal Rahman Iyan; Barry Yusuf Labdul; Rawiyah Husnan
Composite Journal Vol. 2 No. 1 (2022): Composite Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/cj.v2i1.28

Abstract

The reduction of the unit hydrograph from the observed flood hydrograph is an important factor in water construction planning. However, it is difficult to obtain observational flood hydrograph data in the form of AWRL (Automatic Water Level Recorder) and ARR (Automatic Rainfall Recorder) data. Hence, the hydrograph reduction known as synthetic unit hydrograph (SUH) is developed. One of the synthetic hydrographs developed in Indonesia is SUHof ITB-1 and ITB-2. Based on this rationale, this study aimed to analyze the SUH of ITB-1 and ITB-2 in the Bionga Kayubulan sub-watershed. The Straight Line Method was employed to separate the base flow from the run-off in order to obtain a direct run-off hydrograph. In analyzing the effective rain, the study utilized the Φ index equation. Further, the direct run-off and effective rain hydrograph were reduced to the observation unit hydrograph using the Collins method. Additionally, Microsoft Excel-Solver software was used to optimize the SUH of ITB-1 and ITB-2 coefficients on the hydrograph of the observation unit. The hydrograph of the observation unit in the Bionga Kayubulan sub-watershed attained 4.5 hours peak time (Tp) with 2.81 /s peak discharge (Qp). The ITB-1 synthetic hydrograph in the site area attained 5.97 hours peak time (Tp) with 1.96 /s peak discharge (Qp), while the ITB-2 synthetic hydrograph attained 5.97 hours peak time (Tp) with 2.45 /s peak discharge (Qp). The calibration results of ITB-1 synthetic unit hydrograph with changed coefficient parameters showed the time coefficient (Ct) of 0.73, the peak coefficient (Cp) of 1.07, and alpha (α) of 1.60. Further, for the SUH of ITB-2, the results showed a time coefficient (Ct) of 0.73, a peak coefficient (Cp) of 0.96, alpha (α) of 2.50, and beta (β) of 0.95.
PERENCANAAN PEMANENAN AIR HUJAN SEBAGAI ALTERNATIF PENYEDIAAN KEBUTUHAN AIR BERSIH (STUDI KASUS DESA PELEHU KEC. BILATO KAB. GORONTALO) Kamal Purnomo Miu Kamal Purnomo Miu; Rawiyah Husnan; Barry Yusuf Labdul
Composite Journal Vol. 2 No. 1 (2022): Composite Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/cj.v2i1.29

Abstract

Limited water resources in coastal areas is a problem often encountered, with high rainfall intensity being one of the most potent factors to solve it. Pelehu Village is one of regions located in Gorontalo District, a coastal area that was experiencing said problem. Rain intensity is one of the parameters used in calculating the discharge, in wich a proper analysis method based on Bubaa Drainage Basin at Paguayamn Pantai is necessary. The quality of the rainwater that will be used should also be qualified by the water characteristics based on the quality standards, in wich water samples to test the parameters of Chemistry, Physic, and Bacteriology are required. Rainwater harvesting installation system also requires planning and budget planning; therefore, this research aimed to analyze rainwater potential, water characteristics, and rainwater harvesting installation budget plan in Pelehu Village. The inhabitants’ needs for water were calculated based on the projected population growth from 2021 to 2025. Rainfall intesity was analyzed uaing Normal, Log-Normal, Log Pearson III, and Gumbel distributions, while the method used to analyze the rainfall intensity was Mononobe. The rainfall data were retrieved from Bubaa Drainage Basin at Paguyaman Beach for the last seven years. The tested characteristics of rainwater are mandatory Physical, mandatory Chemical, and Bacteriology parmeters based on the quality standard im Permenkes No. 32 of 2017. Budget plan was calculated based on the planning of rainwater harvesting instalation in Pelehu Village Office. The analysis of population growth from 2021 to 2025 is 833, 853, 874, 895, and 917 people, with 66.624, 68.247, 71.611, 73.355 liters/day of water needs amount. The value of Cv, Cs, and Ck of rainfall intensity analysis result of the statistical parameters were 0,84, 3, and 0,2, respectively; hence, the most compatible distribution pattern was the Log Pearson III. The highest precipitation intensity occured in five minutes for return periods of 100 years, wich was 197,75 mm/h. Water discharge was calculated with the rational method of 0,8420 m3/ sec ≈ 824,027 liters/sec. The rainwater potential in the village is 2966,4975 m3/h ≈ 2.966.498 liters/hour. The rainwater characteristics have met the quality standards for the parameters of Chemistry, Physics, and Bacteriology based of Permenkes No. 32, 2017. The budget plan of rainwater harvesting installation is Rp. 6.219.000 (Six Million Two Hundred Nineteen Thousand Rupiah).
Perencanaan Sumur Resapan Air Hujan dalam Upaya Konservasi Daerah Pesisir Barry Yusuf Labdul; Aryati Alitu; Nur Atika Tambipi
Jurnal Teknik Vol 21 No 2 (2023): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v21i2.243

Abstract

Infiltration wells are engineered construction designed for water conservation to accomodate and absorb surface water. Water conservation in necessary to reduce seawater intrusion in coastal areas. Shallow groundwater in Pohe village, located in a coastal a rea, is affected by seawater intrusion. This research aiams to converse groundwater in the coastal area and to reduce rainwater runoff that flows into drainage channels as well as to reduce seawater intrusion. The research is conducted in a coastal area in Pohe Village that is directly adjacent to Tomini Bay. The data are in the form of infiltration rate and soil permeability as the primary data and in form of rainfall in tensity betweet 2019 and 2020 as the secondary data. Infiltration rate data are obtained by useing a Double Ring Infiltrometer and are analyzed using the Horton method. Fourthermore, soil permeability data are tested using the constant head test. Analysis of rainfall intensity uses the Mononobe method, whereas discharge analysis employs th Rational method. The dimension of infiltration wells uses Sunjoto 1988 method.Findings reveal that the infiltration rate (ft) at the research site is 3.89 cm/hour or 38,90 mm/hour which is classified as moderate criteria. The coefficient of soil permeability (k) is 0.07 cm/second. Rain intensity (I) obtains 38.94 mm/hour. According to the data, the area of Pohe Village (A) is 4.83 km2 and the flow coefficient (C) is 0.21. The discharge analysis (Q) is 10.86 m3/second. The dimension of the infiltration wells is planned to use a cylindrical shape with a diameter of (D) 1 m and a depth of (H) 58.90 m. The are 31 wells with a depth of 1.90 m.
ANALISIS DEBIT ANDALAN SUNGAI MENGGUNAKAN APLIKASI PEMODELAN HIDROLOGI HEC-HMS (Studi Kasus di Sungai Sogitia Kecamatan Bone Kabupaten Bone Bolango) Sallim, Muhammad Riza S.; Husnan, Rawiyah; Labdul, Barry Yusuf
Composite Journal Vol. 4 No. 1 (2024): Composite Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/cj.v4i1.33

Abstract

Karakteristik penggunaan lahan dan tanah merupakan sifat-sifat fisik DAS yang mempunyai pengaruh dalam menentukan aliran, yang dinyatakan dalam suatu indeks berupa Curve Number (CN). Sungai Sogitia yang terletak di Desa Sogitia, Kecamatan Bone, Kabupaten Bone Bolango, Provinsi Gorontalo memiliki sumber air yang dapat mecukupi kebutuhan air baku di sekitaran Desa Sogitia. DAS Sogitia memiliki luas DAS 15, 39 km², dengan panjang sungai utama 4,69 km. Proses terbentuknya aliran air sungai (debit) sebagai fungsi parameter komponen sistem DAS dan input presipitasi hujan dapat dinalisis melalui suatu teknik pemodelan hidrologi menggunakan Model HEC-HMS. Nilai Curve Number ditentukan dengan melihat peta tata guna lahan dan peta jenis tanah, serta time lag dihitung menggunakan Persamaan Kirpich. Berdasarkan hasil Penelitian kondisi penggunaan lahan di DAS Sogitia didominasi oleh hutan dengan luas 7,73 km², serta jenis tanah yaitu mediteran merah kuning yang termasuk dalam jenis tanah alfisol dengan tekstur lempung pasir berliat. Parameter yang didapat berupa Curve Number (CN = 69,31), Initial abration (Ia = 22,49 mm), dan Time Lag (TL = 9 menit). Hasil dari pemodelan HEC-HMS pada DAS Sogitia tahun 2009 sampai 2019 dengan debit puncak terjadi pada 21 Mei 2014 dengan nilai besaran debit 30,2 m³/s. Perhitungan debit andalan sungai untuk memperoleh nilai debit yang terpenuhi sepanjang waktu dilakukan dengan menggunakan metode flow duration curve (FDC). Keperluan irigasi dibutuhkan probabilitas 80% dengan nilai 1,3 m³/s. Lokasi penelitian tidak terdapat daerah irigasi, sehingga probabilitas 80% tidak digunakan. Untuk keperluan air baku dan industri debit andalan untuk probabilitas 90% yaitu sebesar 1,1 m³/s.
EVALUASI KERAPATAN JARINGAN STASIUN HUJAN DI DAS BOLANGO BONE Laude, Evita Verent; Labdul, Barry Yusuf; Husnan, Rawiyah
Composite Journal Vol. 3 No. 2 (2023): Composite Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/cj.v3i2.49

Abstract

The location and number of rain stations in a watershed area are the main components in ensuring the availability of rainfall data. Evaluation of the rain station network density is needed to determine the condition of the distribution of rain stations and new rain stations recommendation. The research was conducted in the Bolango Bone watershed with 10 existing rain stations. Rainfall observation data in 7 years (2013-2019). The location and number of rain stations were analyzed using the Kagan-Rodda method based on the standards set by the WMO (World Meteorological Organization) of 100-250 km2/station. The result of the Kagan Method is the optimal number and pattern of placement of rain stations. The evaluation results from 10 stations in the Bolango Bone watershed showed that there were 3 stations, namely Pangi, Pinogu, and Sukamakmur, which did not meet the density of rain stations suggested by WMO. The correlation coefficient for monthly rainfall ranged from 0.4238-0.8351. This correlation value was the average of all rain stations in the Bolango Bone watershed. Based on the results of the Kagan-Rodda analysis, two recommendations were obtained. The first recommendation is to maintain the existing 10 stations with an average error Z1 = 4.12%, interpolation error Z2 = 9.24%, and the distance between stations l = 14.58 km, repositioning the rain stations to each vertex of the Kagan-Rodda triangle. The second recommendation is to add 4 new rain stations without repositioning the existing 10 rain stations with an average error Z1 = 3.45%, interpolation error Z2 = 8.93%, and distance between stations l = 12.32 km.
POTENSI AIR HUJAN UNTUK KETERSEDIAAN AIR BERSIH DI DAERAH GEOTHERMAL (STUDI KASUS DESA PENTADIO BARAT) Putri, Putri Syaferina Djafar; Husnan, Rawiyah; Labdul, Barry Yusuf
Composite Journal Vol. 4 No. 1 (2024): Composite Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/cj.v4i1.50

Abstract

Water is essential for human life, and its scarcity can significantly impact communities. In West Pentadio village, located on the lakeshore, residents struggle with obtaining clean water due to the murky, sulfurous geothermal water. To address this, a study was conducted to evaluate rainwater harvesting as a solution. Analyzing data from DAS Bionga over 13 years, the study used Normal, Log Normal, Log Pearson III, and Gumbel distributions for rainwater distribution and the Mononobe method for rainfall intensity. Population projections from 2021 to 2026, ranging from 1,026 to 1,118 people, indicate increasing daily clean water needs from 71,820 liters to 78,260 liters. The analysis revealed Cv = 0.32, Cs = 1.98, and Ck = 0.32, with Log Pearson III as the most appropriate distribution. The potential rainwater volume is 2,611,497.52 liters per hour with an intensity of 166.268 mm/hour. Conservation rates are 16.5% for one family and 15.2% for 4-5 families. Budgeting using 2020 prices in Gorontalo Regency, a container for one family (1.2 x 1.2 x 1.2 meters) costs Rp. 3,044,703, while a larger container for 4-5 families (2 x 2 x 2 meters) costs Rp. 7,944,877. This rainwater harvesting system offers a viable solution to improve access to clean water for the village.
ALTERNATIF PENGURANGAN LIMPASAN AIR HUJAN DAN KONSERVASI AIR TANAH MENGGUNAKAN SUMUR RESAPAN (STUDI KASUS: KOMPLEKS LORONG MAESA KECAMATAN HULONTHALANGI KOTA GORONTALO) Olii, Rachma Ditha; Husnan, Rawiyah; Labdul, Barry Yusuf
Composite Journal Vol. 3 No. 1 (2023): Composite Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/cj.v3i1.85

Abstract

Sumur resapan adalah upaya untuk meningkatkan penetrasi air hujan ke dalam tanah dan mengurangi limpasan yang menyebabkan genangan ataupun banjir. Penelitian ini bertujuan untuk mengetahui besarnya nilai laju infiltrasi tanah, debit masukan sumur resapan, dan dimensi sumur resapan yang dibutuhkan di Kompleks Lorong Maesa. Lokasi penelitian berada di Kompleks Lorong Maesa. Analisis hidrologi menggunakan data hujan tahun 2011-2020 dari Stasiun Bone Alale, Boidu, dan Tumbihe. Pengujian permeabilitas menggunakan Metode Sumur Uji. Metode untuk menentukan laju infiltrasi menggunakan double ring infiltrometer dan untuk mencari infiltrasi konstan (fc) menggunakan Metode Horton. Metode Rasional digunakan untuk memperoleh debit banjir kawasan. Penentuan dimensi sumur resapan menggunakan Metode Sunjoto. Nilai laju infiltrasi konstan (fc) menggunakan metode double ring infiltrometer diperoleh 6 cm/jam, nilai koefisien permeabilitas tanah (k) adalah 5,833x10-4 cm/det. Intensitas hujan menggunakan Metode Mononobe yang dikomprasi dengan Sherman yaitu 22,33 mm/det. Nilai debit banjir kawasan sebesar 0,138 m3/det dan debit banjir satu unit rumah 8,3x10-4 m3/det. Direncanakan sumur resapan berbentuk lingkaran dengan diameter 0,8 m dan tinggi 1 m dengan Qresapan 1,32x10-3 m3/det. Pengurangan limpasan oleh sumur resapan untuk satu unit rumah sebesar 88,3% dan untuk total seluruh kawasan 47,57% sehingga debit banjir untuk satu unit rumah berkurang menjadi 1,0x10-4 m3/det dan debit banjir untuk kawasan berkurang menjadi 7,28x10-2 m3/det. Konservasi air tanah oleh sumur resapan untuk satu unit rumah yaitu 7,3x10-4 m3/det, untuk kawasan sebesar 6,6x10-2 m3/det. Biaya yang dibutuhkan untuk membuat satu unit sumur resapan berdiameter 0,8 m dengan kedalaman 1 m adalah Rp. 1.052.000 (Satu Juta Lima Puluh Dua Ribu Rupiah).
BULANGO ULU RESERVOIR OPERATIONAL PATTERN MODEL Nani, Elma; Nani, Elma Tiani; Labdul, Barry Yusuf; Husnan, Rawiyah
INDONESIAN JOURNAL OF CONSTRUCTION ENGINEERING AND SUSTAINABLE DEVELOPMENT (CESD) Vol 7 No 2 (2024): INDONESIAN JOURNAL OF CONSTRUCTION ENGINEERING AND SUSTAINABLE DEVELOPMENT (CESD)
Publisher : Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25105/cesd.v7i2.21525

Abstract

The Bulango Ulu Reservoir is located in Gorontalo Province, the construction of the Bulango Ulu Reservoir is to meet the needs of raw water, irrigation water, and hydropower, to ensure whether the need and availability of water in the rainy and dry seasons can meet the initial planning goals. In this study, the method used is to simulate the operation pattern of the reservoir with variations in the wet season with the probability of discharge (66.67%), the normal season with the probability of discharge (50%), and the dry season with the probability of discharge (33.33%) so as to determine the availability of the Bulango Ulu Reservoir during the rainy season and dry season whether the needs can be met. The results obtained can be used as input for the regulation of the Bulango Ulu Reservoir operation pattern.
MODEL POLA OPERASI WADUK BULANGO ULU Nani, Elma Tiani; Labdul, Barry Yusuf; Husnan, Rawiyah
Composite Journal Vol. 4 No. 2 (2024): Composite Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/cj.v4i2.131

Abstract

Waduk Bulango Ulu berada di Provinsi Gorontalo, pembangunan Waduk Bulango Ulu adalah untuk pemenuhan Kebutuhan air baku, air irigasi, dan PLTA, untuk memastikan apakah penggunaan sumber daya air termasuk penjadwalan dan pembebasan air untuk pemenuhan kebutuhan air baku, air irigasi, dan PLTA dengan menyesuaikan ketersediaan air pada musim hujan dan musim kering dapat memenuhi tujuan awal perencanaanya. Pada penelitian ini metode yang digunakan adalah simulasi pola operasi waduk dengan variasi musim basah dengan probabilitas debit (66,67%), musim normal dengan probabilitas debit (50%), dan musim kering dengan probabilitas debit (33,33%) sehingga dapat diketahui ketersediaan Waduk Bulango Ulu pada saat musim hujan dan musim kering untuk memenuhi kebutuhan air, karena itu perancangan dan pengoperasian waduk yang tepat sangat dibutuhkan karena kecenderungan persediaan air yang terbatas, sementara kebutuhan air terus meningkat dari tahun ke tahun sebagai dampak dari laju pertumbuhan penduduk. Hasil yang diperolah dapat dijadikan masukan bagi pengaturan pola operasi Waduk Bulango Ulu.
Analisis Ketersediaan dan Kebutuhan Air Bersih Masyarakat Popayato Eka, Eka Saputri; Husnan, Rawiyah; Labdul, Barry Yusuf
Composite Journal Vol. 4 No. 2 (2024): Composite Journal
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/cj.v4i2.137

Abstract

Kecamatan Popayato dan Popayato Timur merupakan wilayah yang didominasi oleh pemukiman dan pertokoan. Pertumbuhan penduduk yang terus meningkat mengakibatkan bertambahnya konsumsi air bersih, sehingga dilakukan penelitian tentang analisis ketersediaan dan kebutuhan air bersih masyarakat Popayato. Metode analisis yang digunakan adalah dengan analisa proyeksi jumlah penduduk menggunakan metode geometrik, metode antartika, metode eksponensial serta pemilihan metode proyeksi penduduk. Analisis juga dilakukan pada kebutuhan air bersih berupa kebutuhan air domestik, kebutuhan air non domestik, kebutuhan air total, hingga kebutuhan air rata-rata. Hasil analisis menunjukkanBesarnya kebutuhan air total daerah Kecamatan Popayato dan Popayato Timur di tahun 2034 adalah 0,0385 m3/det. Neraca Air di Sungai Popayato maleo menunjukkan bahwa debit Sungai Popayato Maleo tidak terjadinya defisit debit jika dilihat dari data ketersediaan air yang ada dengan kebutuhan air masyarakat Kecamatan Popayato dan Popayato Timur.
Co-Authors Aryati Alitu Aryati Alitu Dwi, Dwi Ramadan Eka, Eka Saputri Endrizal Rahman Iyan Fatmawati Abdul Razak, Fatma Kaharu, Aan Nurhandiat Kamal Purnomo Miu Kamal Purnomo Miu Karim, Meldiana Laude, Evita Verent Nani, Elma Nani, Elma Tiani Nur Atika Tambipi Olii, Rachma Ditha Pandjab, Nabil Raihan Putri, Putri Syaferina Djafar Rawiyah Husnan Sallim, Muhammad Riza S. Usu, Zuhriyah Raihanah Utiarahman, Dinar Fauziah