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All Journal Jurnal Teknik Pengairan: Journal of Water Resources Engineering Jurnal Penelitian Pendidikan IPA (JPPIPA) Unram Journal of Community Service (UJCS)
Ery Setiawan
University of Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Social Sciences

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Analisis Ketersediaan Air Menggunakan Model Rain Run NRECA dan Tanki di DAS Babak Ida Bagus Subrata; Hartana Hartana; Ery Setiawan
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 11 No. 2 (2020)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2020.011.02.01

Abstract

Dalam penelitian ini akan ditinjau adalah pemodelan Nreca maupun Tanki pada Bendung Keru di DAS Babak yang memiliki ketersedian catatan debit air. Pemodelan dimulai dari kalibrasi model rain run sehingga mendapatkan koefisien Nreca dan Tanki pada AWLR Keru. Kemudian perhitungan debit pada Bendung Keru menggunakan data spasial serta data curah hujan dari ARR Keru. Hasil antara pemodelan pada Nreca dan Tanki dibandingkan dengan catatan debit pada Bendung Keru. Hasil dari penelitian ini adalah nilai koefisien model pada AWLR Keru di DAS Babak WS Lombok: a) Koefisien model NRECA yaitu untuk Tampungan kelengasan awal : 727; Tampungan kelengasan akhir: 312; Koefisien Reduksi: 0.27; Koefisien PSUB: 0.43; Koefisien GWF: 0.1; Beda tampungan awal dan akhir: 12; Nilai Korelasi: 0.84; Nilai Volume Error (VE): 0.33; b) koefisien model tanki yaitu Koefisien Tanki 1: Tank Awal : 868; H 1.1 : 29; H 1.2 : 28; F 1.1 : 794; F 1.2 : 661; B1: 254; Koefisien tanki 2: Tank Awal : 330; B2 : 585; Nilai Korelasi : 0.75; Nilai Volume Error (VE): 0.31. Dalam pemodelan debit untuk perhitungan ketersediaan air yang optimal di DAS Babak WS Lombok terutama pada Bendung Keru menggunakan model Tanki.
Evaluasi Rasionalisasi Stasiun Hujan Metode Kagan Rodda dengan Mempertimbangkan Kriteria Penentuan Lokasi Pembangunan Stasiun Hujan Reza Renaldhy; I Wayan Yasa; Ery Setiawan
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 12 No. 1 (2021)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2021.012.01.05

Abstract

This study aims to evaluate the rain station rationalization method using Kagan. In its application, the Kagan method can give results in the form of the number of stations and the location of the placement of the rain station network in an area. However, in its application in the field, the recommendation in the form of placement points does not meet the location criteria for the construction of a rain station. The results of the evaluation carried out at WS Sumbawa show that there are 116 rain stations that need to be added, but after being evaluated using Google Earth to see the suitability of the location against the criteria for the location of the rain station construction, only 36 points meet the criteria. To optimize this method, the recommendation points that do not meet the requirements are moved to the nearest water structure location such as a dam, embung or weir, so that 19 points are moved to the nearest water structure and 61 points are not recommended for the construction of a rain station. These results prove that the recommended number and placement points from the rationalization analysis of the Kagan method cannot be directly applied in the field, the recommendations given must be re-evaluated by taking into account the principles in determining the location of rain post construction.
English English Salsa Fajrina Ghaisani; Yusron Saadi; Ery Setiawan; Yasa I Wayan; Salehudin Salehudin; Agus Suroso
Jurnal Penelitian Pendidikan IPA Vol 10 No 4 (2024): April
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i4.7207

Abstract

River diversion is a procedure carried out prior to constructing a dam. It is conducted by diverting water from the main river so that the main dam construction work can be executed at a specifically dry area. In Meninting Dam, the diversion system consists of two main structures, namely cofferdam and diversion tunnel that is equipped with a navigation structure at the upstream part of the tunnel. During the construction, cofferdam experienced overtopping on June 17, 2022. The overtopping most likely occurred because of the diversion tunnel’s inability to divert the actual flood effectively during the construction. Therefore, this research aimed to analyse the effectiveness of Meninting Dam’s proposed diversion tunnel against design flood discharge for a return period of 25 years. The data used in this research were the updated version of the ones used to design the whole construction of Meninting Dam’s diversion system, while the flow conditions along the diversion tunnel were analysed using HEC-RAS. At the same time, the analysis was also carried out using the Level Pool Routing Method as a comparison. The analysis results show that the design flood discharge for a return period of 25 years in Meninting Dam Watershed is 265,62 m3/s. This causes the water level along the diversion tunnel reach el. +165,95 m above sea level. Taking into account that the cofferdam crest elevation is at +170,00 m above sea level, it could be concluded that Meninting Dam’s proposed diversion tunnel, which is 4 m wide and 4 m tall is able to divert the design flood discharge for a return period of 25 years effectively. The investigation results in Meninting Dam Watershed show that the main cause of the overtopping was heavy precipitation. This caused the increasing water level at the upstream part of the cofferdam that resulted to its inability to function properly, taking into account that it was still under construction when it occurred
Artificial Rainfall Aquifer to Supply Clean Water Requirement During the Dry Season in Selengen Village, North Lombok Regency I Wayan Yasa; Didi Supriyadi Agustawijaya; Atas Pracoyo; Ery Setiawan; Hasyim Hasyim; I Dewa Made Alit Karyawan; Humairoh Saidah; I Dewa Gede Jayanegara; Dewandha Mas Agastya
Unram Journal of Community Service Vol. 5 No. 2 (2024): June
Publisher : Pascasarjana Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ujcs.v5i2.608

Abstract

Selengen Village is one of the villages in North Lombok Regency that always experiences drought and lack of clean water every year. The problem of clean water availability is caused by limited water sources on the surface. The frequency of rainwater in Selengen Village is very small and with very low intensity. In order to meet the need for clean water, the community has to pay additional costs to buy clean water or wait for a drop from the government. The Selengan Village community has limited information regarding simple methods that can be used to collect clean water sourced from rainwater. The method used to introduce rainwater capture as a source of clean water is to provide direct outreach to the Selengen Village community about rainwater storage in the form of ABSAH (Artificial Aquifer for Rainwater Savings). The ABSAH method can be done individually or in groups. The socialization was carried out at the Panggung Barat Hamlet office involving the community consisting of farmer groups, community leaders, youth organizations and housewives. The result of the socialization regarding the introduction of artificial rainwater aquifers is the high desire of the community to create rainwater storage, either independently/individually or in groups. In the process of making it, the community hopes to get assistance from the implementation team so that the calculation of the storage volume is in accordance with the volume of water used. Apart from that, the community also hopes to be given drawings of storage designs, installations for collecting water from the roofs of houses and designs of distribution networks to people's homes.
Co-Authors Agus Suroso Atas Pracoyo Dewandha Mas Agastya Didi Supriyadi Agustawijaya Hartana Hartana Hasyim Hasyim Humairoh Saidah I Dewa Gede Jayanegara I Wayan Yasa Ida Bagus Subrata Karyawan, I Dewa Made Alit Reza Renaldhy Salehudin Salehudin Salsa Fajrina Ghaisani Yasa I Wayan Yusron Saadi