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Optimization of Meninting Dam water utilization to meet Irrigation, Raw Water, and Micro Hydro Power Plant potential needs Grahestika, Ni Ketut Laksmi; Setiawan, Ery; Sulistiyono, Heri
Indonesian Journal of Multidisciplinary Science Vol. 4 No. 5 (2025): Indonesian Journal of Multidisciplinary Science
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/ijoms.v4i5.1096

Abstract

The construction of the Meninting Dam located in West Lombok Regency, was motivated by the unequal supply of water on Lombok Island. The Meninting Dam was built with the aim of providing irrigation water to Sesaot, Penimbung, and Ketapang Irrigation Area. Apart from that, it is also to supply raw water needs and is used for electricity generation. In fulfilling these goals, it is necessary to carry out careful calculations and use water optimally in an effort to meet these needs. This research aims to obtain optimization results from water utilization with the objective function in the form of maximum profit with a decision variable in the form of optimal irrigated land area and to determine the annual benefit value from dam water use. Optimization analysis is carried out using program Solver in Microsoft Excel. In calculating water availability, Orong Atas AWLR data is used with an area comparison formula. Meanwhile, in calculating the need for irrigation water, several alternatives were tried based on the start of different planting seasons. Based on optimization calculations using Solver, the optimum area was obtained at 1065,29 ha in Sesaot Irrigation Area, 454 ha in Penimbung Irrigation Area, and 40 ha in Ketapang Irrigation Area with a planting intensity for each irrigation area of 300% and reliability of the reservoir at the November I planting season was 80,42%. The value of annual benefits obtained in one year from the productivity of paddy and secondary crops, raw water, and electricity is IDR 105.168.334.600,00.
Artificial Rainfall Aquifer to Supply Clean Water Requirement During the Dry Season in Selengen Village, North Lombok Regency Yasa, I Wayan; Agustawijaya, Didi Supriyadi; Pracoyo, Atas; Setiawan, Ery; Hasyim, Hasyim; Karyawan, I Dewa Made Alit; Saidah, Humairoh; Jayanegara, I Dewa Gede; Agastya, Dewandha Mas
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.
Enhancing Public Understanding of Riverbank Management and Regulations for Flood Control in Tabelo River Mas Agastya, Dewandha; Setiawan, Ery; Yasa, I Wayan; Syntia Dewi, Evrianti
Unram Journal of Community Service Vol. 6 No. 2 (2025): June
Publisher : Pascasarjana Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ujcs.v6i2.968

Abstract

Flood disasters in Kuta Village, Central Lombok Regency, are caused by high rainfall intensity, sedimentation, land-use changes, and low public awareness of river conservation. This study evaluates flood mitigation strategies for the Tabelo River through structural and non-structural approach. Hydrological analysis indicates that the river’s cross section is inadequate to handle flood discharge, leading to frequent overflows. Structural measures include sediment dredging to a depth of 1,45 m and constructing 4 m high embankments. Hydraulic modeling using HEC-RAS support these interventions to reduce flooding. Non-structural measures involve community outreach on riverbank regulations based on Ministerial Regulations No. 28 of 2015. This initiative aims to increase public awareness, prevent illegal riverbank constructions, and promote sustainable river management. The enforcement of riverbank regulations is expected to reduce flood risks, improve water quality, and minimize erosion and sedimentation. Additionally, educational posters have been developed to reinforce awareness of flood control and river construction. Integrating structural and non-structural strategies is crucial to mitigating floods and fostering environmental responsibility in Kuta Village.
Penilaian kinerja sistem irigasi berdasarkan pendekatan permen PUPR No.12/PRT/M/2015 dan metode MASSCOTE di daerah irigasi Reban Batu Sumbawa Barat Sukma, Dwi Mahenra; Hartana, Hartana; Setiawan, Ery
Jurnal Agrotek Ummat Vol 9, No 4 (2022): October
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jau.v9i4.10801

Abstract

The Reban Batu irrigation area located in West Sumbawa Regency has experienced a decline in the performance of its irrigation system. Therefore, it is necessary to make efforts to improve the performance of the irrigation system by carrying out maintenance and rehabilitation, which is based on the results of the irrigation performance index assessment. The purpose of this study is to determine the irrigation system performance index in the Reban Batu irrigation area and the variables that affect irrigation performance. As for the irrigation system performance assessment, it can be based on the decree of PUPR No. 12/PRT/M/2015 and the MASSCOTE Method. The irrigation system performance assessment was carried out by direct surveys of the location and interviews with Water User Association (WUA) Farmers as beneficiaries and operational and maintenance (OM) officers as managers, resulting in a performance index based on the decree of PUPR 68.26% which was included in the category of underperforming and requiring attention. Meanwhile, based on the MASSCOTE method, the score is 2.69 or the level of service is in the poor category. Based on path analysis, the indicator variables of Irrigation Service (X1), WUA (X2), Human Resources of OM Officers  (X3), and the Modernization of OM (X4)together have a significant effect on the irrigation performance variable (Y) of 0.931 or 93.1%.
Sosialisasi Pengolahan Air Hujan Menggunakan Down Flow Slow Sand Filter (DSSF) Tipe-U Di Desa Gumantar, Kabupaten Lombok Utara Setiawan, Ery; Jaya Negara, I D G; Sani, Asrul; Nurhidayah; Arisma, Baiq Haemi; Megawati; Iswani, Fahrona; Ananta, Dian; Mala, Hairul; Pratama, M. Hengky; Adriansyah, Ahmad Ardi; Wahyu, Indra
Portal ABDIMAS Vol. 3 No. 2 (2025): Jurnal PORTAL ABDIMAS
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/r7263y38

Abstract

Kekurangan air bersih kadang terjadi saat musim kemarau panjang di wilayah Desa Gumantar, Kayangan, Lombok Utara, sehingga mendorong perlunya pemanfaatan sumber air alternatif seperti air hujan. Salah satu teknologi tepat guna untuk mengolah air hujan adalah Down Flow Slow Sand Filter (DSSF) tipe U, sebuah sistem filtrasi gravitasi yang dirancang untuk skala rumah tangga atau komunal kecil. Kelebihan utama dari alat ini adalah konstruksinya yang sederhana, biaya operasional yang sangat rendah karena tidak memerlukan energi listrik, menggunakan material lokal, murah serta kemampuannya yang efektif dalam mengurangi kekeruhan melalui lapisan biologis yang terbentuk di atas media pasir. Metode sosialisasi berupa penyuluhan kepada masyarakat secara terpusat di Masjid Nurul Iman, Dusun Dasan Tereng, Desa Gumantar, Lombok Utara menggunakan alat peraga berupa materi tayangan, slide dan gambar-gambar pendukung lainnya. Antusias masyarakat cukup tinggi dalam merespon pelaksanaan kegiatan tersebut. DSSF tipe U dapat menjadi solusi yang menjanjikan dan berkelanjutan untuk penyediaan air bersih di daerah krisis air bersih.
Pendampingan Pembelajaran Lapangan Dalam Perancangan Dan Penggunaan Sistem Irigasi Tetes Pada Mahasiswa Tingkat Akhir Negara, I Dewa Gede Jaya; Salehudin, Salehudin; Suroso, Agus; Widiyanti, Desi; Salsabila, Fera Fitri; Supriyadi, Anid; Setiawan, Ery; Wiradarma, Lalu Wirahman; Suparjo, Suparjo; Eniarti, Miko; Hidayati, Nufalia
Jurnal Gema Ngabdi Vol. 7 No. 3 (2025): JURNAL GEMA NGABDI
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jgn.v7i3.621

Abstract

Final-year students of the Civil Engineering Department are the spearhead of the University of Mataram's output. They need to be provided with comprehensive academic knowledge and skills to enable them to adapt to a flexible workplace. This is especially true in the current era of drought, which is a significant concern, making it crucial to provide students with the efficient use of water for crop irrigation. Therefore, final-year students need to be encouraged to undertake field-level learning to complement their knowledge and skills before completing their studies. Therefore, it is necessary to mentor final-year students in the design and use of water-efficient drip irrigation systems at the field level for a specific period of time to improve their competency until they are able to use drip irrigation in agriculture. This activity aims to mentor final-year students in the design and use of drip irrigation systems at the dryland level in Pujut District, Central Lombok Regency. The mentoring activities include site preparation, network preparation, drip irrigation network testing, and the use of drip irrigation in the planting medium. The irrigation design uses ¾-inch and ½-inch PVC pipes, factory-made Netafim (NTF) drip pipes, a 600-liter water tank as the water source, and accessories. Students were mentored through the stages of creating a distribution network, designing a drip irrigation network, testing it, and implementing it on their planting areas. The mentoring program successfully guided four final-year students and local residents, and the students were able to construct a drip irrigation network on approximately one acre of land. The students have successfully implemented the drip irrigation system.