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All Journal Jurnal Ilmiah MITSU (Media Informasi Teknik Sipil Universitas Wiraraja) JTT (Jurnal Teknologi Terpadu) Journal of Marine-Earth Science and Technology Journal of Social Research Aceh International Journal of Science and Technology
Maulana, Mahendra Andiek
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Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Pengembangan Alat Ukur Hidrometri Berbasis 5 Jenis Sensor Untuk Deteksi Konsentrasi Sedimen Dalam Upaya Mitigasi Bencana Banjir Sungai Bomo Erwanto, Zulis; Iranata, Data; Maulana, Mahendra Andiek; Sasmita, Ginanjar Eka; Handoko, Siswo; Habibi, Hida Jaya; Hasyim, Nur Cholik
Jurnal Teknologi Terpadu Vol 12, No 1 (2024): JTT (Jurnal Teknologi Terpadu)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jtt.v12i1.1914

Abstract

Peristiwa banjir pada DAS bertipe bulu burung di Banyuwangi dapat membawa dampak tingginya angkutan sedimen dan menurunnya kualitas air. Peluapan sungai Bomo dipacu karena intensitas hujan dan kecepatan aliran tinggi sehingga berdampak erosi, degradasi, dan kekeruhan yang tinggi. Tujuan penelitian untuk pengembangan alat ukur hidrometri berbasis sensor untuk deteksi konsentrasi sedimen dalam upaya mitigasi bencana banjir di Sungai Bomo. Tahapan penelitian melalui proses rancang bangun alat ukur hidrometri berbasis sensor berupa sensor ultrasonic (water level), water flow, turbidity, TDS, dan suhu, lalu simulasi pengukuran, dan pengambilan sampel sedimen untuk diuji karakteristik fisik di laboratorium berupa uji konsentrasi sedimen, berat jenis, berat volume, analisa saringan dan hidrometer. Parameter hidrometri diuji statistik melalui sediment-discharge rating curve. Hasil pengujian karakteristik fisik sedimen sungai Bomo selama 7 hari masing-masing di bulan basah dan kering diperoleh nilai rata-rata Cu 3,88 – 6,58 dan nilai rata-rata Cc 0,62 – 1,19, berat jenis rata-rata 2,5 – 2,55 dan berat volume 1,49 – 1,57 gr/cm3. Kalibrasi pembacaan sensor TDS terhadap konsentrasi sedimen dengan nilai MAE rata-rata sebesar 0,23 reliable terhadap kondisi lapangan. Hasil sediment-discharge rating curve pada musim kering diperoleh persamaan Qs_dry=35.653.(Qw)^0.9315 (R2 = 0.8269). Pada musim basah diperoleh persamaan Qs_wet=16.501.(Qw )^1.3719  (R2= 0.9336). Pada saat musim kering perlu waspada karena lahan lebih erosif karena nilai a > 26 yaitu 35.653 yang mengindikasikan laju erosi tinggi dan dapat menyebabkan banjir dan longsor. Alat ukur hidrometri berbasis sensor layak dikembangkan sebagai alat deteksi konsentrasi sedimen sebagai indikator muatan sedimen dalam upaya mitigasi bencana banjir dan tindakan konservasi lahan.
Assessment and Prediction of Hydrometeorological Drought in Corong River Basin, Indonesia Affandy*, Nur Azizah; Iranata, Data; Anwar, Nadjadji; Maulana, Mahendra Andiek; Prastyo, Dedy Dwi; Yusop, Zulkifli; Wardoyo, Wasis
Aceh International Journal of Science and Technology Vol 12, No 3 (2023): December 2023
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.12.3.32592

Abstract

Hydrological drought analysis in a river basin is crucial because it impacts water resource management, agriculture, drinking water supply, industry, ecology, and disaster risk mitigation. It plays a key role in water usage planning, safeguarding agricultural yields, and ensuring a stable drinking water supply. In the context of this research, the Corong River basin is used as a case study. This study aims to determine the level of hydrological drought (deficit) using the Threshold Level Method (TLM) and predict hydrological drought using the Seasonal Autoregressive Integrated Moving Average (SARIMA) model. This model understands the characteristics of drought and predicts drought in the Corong River basin for early mitigation and anticipation of drought in the region. The results of this research indicate a strong relationship between the Hydrological Drought Index (HDI) and streamflow and Precipitation (PRCP), which can be used to forecast future droughts. This model is highly robust and accurate in observing the level of hydrological drought (deficit, duration, and sharpness) and predicting drought events in the Corong River basin. These findings have significant practical implications for water management and disaster risk mitigation in this river basin while also advancing the scientific understanding of hydrological drought.
PENGARUH PERUBAHAN TATA GUNA LAHAN TERHADAP NILAI CURVE NUMBER PADA DAS SAROKAH Zainah, Nor; Maulana, Mahendra Andiek; Margini, Nastasia Festy
Jurnal Ilmiah MITSU (Media Informasi Teknik Sipil Universitas Wiraraja) Vol 12 No 2 (2024): Jurnal Ilmiah MITSU
Publisher : Fakultas Teknik, Universitas Wiraraja

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24929/ft.v12i2.3612

Abstract

Changes in land use in a watershed can significantly affect its hydrological characteristics. In addition to extreme rainfall events, land-use changes are among the factors contributing to flooding. This study aimed to determine changes in CN values due to land use changes in the Sarokah Watershed. Land use analysis was conducted by training objects on satellite image data acquired by Landsat 7, Landsat 8, and Sentinel 2A. From 2002 to 2013, there was a 9.03% decrease in the area of paddy fields and a 5.83% increase in the area of farms in the Sarokah Watershed. From 2013 to 2023, there was a 3.16% increase in built-up area and a 5.26% decrease in the area of paddy fields. According to the district's spatial plan, from 2023 to 2042, there will be a 29.15% increase in the built-up area and a 19.69% increase in the area of paddy fields. However, forest/tree areas and farm areas will decrease by 17.36% and 23.96%, respectively. Based on the 2023-2043 land use changes, the highest increases in CN values in 2043 will be in Sub-watersheds S15, S6, and S14 at 16.5%, 13.2%, and 10.8%, respectively.
HYDRAULIC MODELING STUDY OF ALTERNATIVE FLOOD CONTROL STRATEGIES FOR THE REJOSO RIVER PASURUAN Syamsuddin, Mohammad Dimas Noor; Maulana, Mahendra Andiek
Journal of Marine-Earth Science and Technology Vol. 6 No. 1 (2025): April
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Rejoso River is administratively included in Pasuruan Regency where its watershed is located in 10 sub-districts (Puspo, Tosari, Gondang Wetan, Rejoso, Winongan, Pasrepan, Grati Districts of Pasuruan Regency and Lumbang, Sukapura, Probolinggo Regency). The area of the Rejoso River watershed is ± 361.2 km2, bordered by hillsides and protected forests. In general, the cause of flooding in the Rejoso River watershed is caused by high intensity rainfall and changes in land use such as the Rejoso River, especially in the upstream area. The flat topography of the downstream area causes potential sedimentation which inhibits the flow (run off). The purpose of this study is to determine the condition of the existing system and capacity of the Rejoso River; to determine the influence of land use, and to provide alternative scenarios for the most effective flood control to reduce the flood water level or collect the flood that occurs. In this study, hydrological and hydraulic modeling was carried out. The method that used in the calculation of flood discharge is HEC-HMS, while for hydraulic analysis the HEC-RAS 1D is used with the results of water level at the river cross section. This analysis aims to determine the most effective flood control scenario for reducing flooding that occurs in the Rejoso River. The results of this study are alternative flood control scenarios for the Rejoso River by carrying out normalization, embankment’s structure and retention ponds which are the best scenarios for reducing high flood water levels. This can be shown by a decrease of average height of the flood water level from 1.207 meters to 0.435 meters. With these conditions, it can be concluded that this scenario is the best scenario for reducing the high flood overflow in the Rejoso River.
Evaluation of the Jlantah Dam Inflowing Area as a Reference af Efficiency Towards Implementation Time and Cost Sunawilalodra, Gaga; Maulana, Mahendra Andiek; Rohman, Arif
Journal of Social Research Vol. 2 No. 8 (2023): Journal of Social Research
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/josr.v2i8.1322

Abstract

Jlantah Dam is located on the Jlantah River, Karanganyar Regency, Central Java Province. The construction of the Jlantah dam serves irrigation needs, raw water supply, flood reduction, and tourism. In the implementation of the construction, there are problems with land acquisition in the reservoir inundation area. This problem will affect the time and cost of implementing the construction of the Jlantah Dam. Therefore, it is necessary to carry out a simulation to determine the optimum reservoir volume of the reservoir that can fulfill the benefits of the dam, the implementation of which is not hampered by land acquisition in the inundation area and is efficient in terms of time and cost of implementation. In determining the inundation area of the reservoir, a capacity curve based on the topographic map is used to determine the area and volume of the reservoir at each elevation, then a simulation is performed to calculate at what elevation the reservoir can fulfill its planned utilization. The simulation was carried out with 2 (two) alternative conditions, namely the conditions at the crest elevation + 685 and the crest elevation + 682. From these two alternatives, it can be seen the reliability of the reservoir for each condition. The results of the evaluation obtained from the two mercury elevations have the greatest benefit value at + 685 elevations with a reservoir reliability value of 97.22%, a BCR value of 1.218, and an IRR value of 5.88% with a total cost of Rp. 1,750,818,179,096.
Co-Authors Affandy*, Nur Azizah Arif Rohman Data Iranata Dedy Dwi Prastyo Habibi, Hida Jaya Handoko, Siswo Hasyim, Nur Cholik Margini, Nastasia Festy Nadjadji Anwar Sasmita, Ginanjar Eka Sunawilalodra, Gaga Syamsuddin, Mohammad Dimas Noor Wardoyo, Wasis Yusop, Zulkifli Zainah, Nor Zulis Erwanto