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All Journal Jurnal Teknologi dan Rekayasa Sumber Daya Air
Runi Asmaranto
Brawijaya University
Earth & Planetary Sciences Engineering

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Analisa Pendugaan Laju Erosi Dengan Menggunakan Model Agricultural Non Point Source Pollution (AGNPS) di Sub Das Lesti Kabupaten Malang Muhammad Fariz Kasyful Haq; Moh Sholichin; Runi Asmaranto
Jurnal Teknologi dan Rekayasa Sumber Daya Air Vol. 1 No. 1 (2021): Jurnal Teknologi dan Rekayasa Sumber Daya Air (JTRESDA)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtresda.2021.001.01.16

Abstract

Changes in landuse and the topographic are undulating and hilly with a slope of 8-45%, as well as the intensity of precipitation impacts on increased erosion rates in sub-watershed Lesti area. Continuous erosion of land causes shallows rivers in Sub-watershed Lesti. An analysis and mapping of the greater existential rates on erosion and sedimentation along with the erosion of sub-watershed Lesti as well as land conservation efforts to reduce the effects of such erosion.Calculations using a model Agricultural Non-Point Source Pollution (AGNPS) obtained an average watershed erosion rate of 163,119 tons / ha / year. The results analysis of the danger erosion levels and area based on erosion danger index by hammer (1981) is obtained with a low level index (<1) 13,770 km2, a moderate level (index 1-4) 13,521 km2, a high level (index 4-10) 14,623 km2, and an exorbitant level (index >10) 16,342 km2. Based on sediment delivery ratio (SDR), results of sediment are 144,820.54 tons / year or 120,683.96 m3 / year. The conservation of land to reduce the rate of erosion are carried out in several ways, either by using vegetative and  mechanical methods.
Studi Perencanaan Embung Lapangan Jegreg Kecamatan Lengkong Kabupaten Nganjuk Provinsi Jawa Timur Reja Palevi Al Huda; Runi Asmaranto; Very Dermawan
Jurnal Teknologi dan Rekayasa Sumber Daya Air Vol. 1 No. 1 (2021): Jurnal Teknologi dan Rekayasa Sumber Daya Air (JTRESDA)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtresda.2021.001.01.14

Abstract

The problem in dry season is about water availability, while during wet season there are often several puddles in an area in Jegreg Village in Nganjuk Regency. This is due to the increasing need of the population which is not in line with the development of water supply facilities and infrastructure. In this study, the authors make an analysis related to this problem, by planning a reservoir that can be used to accommodate water during the rainy season so that can be used to reduce floods.Based on the analysis, the dead storage volume (Sediment) are 9,49 m3,  and the effective storage volume are 68,96 m3and then the total storage volume are  78,45 m3 . The height of ponds is 3 meters , with the spillway type is side channel spillway with 0,5 meter of  height. In elevation +40,50 the width of spillway are 17,15 meters. In stability analysis, the analysis used in the slope stability of the reservoir is the Bishop method with  Geostudio2012 application and from the results of the analysis, the safety number meets the requirements. For the analysis of spillway safety against shear and rolling forces, in normal, flood condition, and earthquakes condition, the safety figures meet the requirement.
Analisa Banjir Akibat Keruntuhan Bendungan Prijetan di Kabupaten Lamongan Menggunakan Aplikasi Zhong Xing HY21 Irsyad Musthofa Yahya; Pitojo Tri Juwono; Runi Asmaranto
Jurnal Teknologi dan Rekayasa Sumber Daya Air Vol. 2 No. 2 (2022): Jurnal Teknologi dan Rekayasa Sumber Daya Air (JTRESDA)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtresda.2022.002.02.17

Abstract

The Prijetan Dam was the first dam built in Indonesia in 1910 – 1916 by the dutch east indies government. This dam was built on the Prijetan River which is located in Sumbergempol Village, Kedungpring District, Lamongan Regency, East Jawa Province. Considering the age of the Prijetan Dam which is more than 100 years old, further analysis are needed on the impact of the dangers that can be caused by the break of the Prijetan Dam. Dams break is the collapse of part or all of the main dam causing the dam to be unable to function again. Dam breaks mostly occur due to overtopping or piping. From the simulation of the dam break of the Prijetan Dam using the Zhong Xing HY21 software, it was found that the largest floods occurred in the bottom piping scenario with the condition of the floodwater level reservoir. The area of the floods reached 26,607 km2 with a maximum flood depth of 6,880 m. The floodsspread to 38 villages located downstream of the Prijetan Dam with an estimated 11.412 people at risk Bendungan Prijetan merupakan bendungan pertama yang dibangun di Indonesia pada sekitar tahun 1910 - 1916 oleh pemerintahan Hindia Belanda. Bendungan ini berdiri diatas Sungai Prijetan yang terletak di Desa Sumbergempol, Kecamatan Kedungpring, Kabupaten Lamongan, Provinsi Jawa Timur. Mengingat usia Bendungan Prijetan yang lebih dari 100 tahun, maka diperlukan analisa lebih lanjut mengenai dampak bahaya yang dapat ditimbulkan oleh kegagal Bendungan Prijetan. Kegagalan bendungan yang dimaksud ialah runtuhnya sebagian atau seluruh tubuh bendungan yang menyebabkan bendungan tersebut tidak dapat berfungsi kembali. Kegagalan atau keruntuhan bendungan paling banyak terjadi akibat overtopping ataupun piping. Dari hasil simulasi keruntuhan Bendungan Prijetan menggunakan software Zhong Xing HY21, didapatkan banjir terbesar terjadi pada skenario piping bawah dengan kondisi tampungan waduk muka air banjir (MAB). Luas genangan banjir yang terjadi mencapai 26,607 km2 dengan kedalaman maksimum 6,880 m. Genangan banjir menyebar ke 38 desa yang berada di bagian hilir Bendungan Prijetan dengan perkiraan 11.412 penduduk terkena risiko.
Studi Potensi Air Tanah dan Karakteristik Hidrokimia Di Desa Pelem, Kecamatan Bungkal, Kabupaten Ponorogo Bima Aji Pangestu; Runi Asmaranto; Emma Yuliani
Jurnal Teknologi dan Rekayasa Sumber Daya Air Vol. 2 No. 2 (2022): Jurnal Teknologi dan Rekayasa Sumber Daya Air (JTRESDA)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtresda.2022.002.02.18

Abstract

Pelem Village, Bungkal District, Ponorogo Regency is a location that is affected by drought during the dry season and relies on rain for irrigation needs. The research was conducted to determine the geological structure, potential of groundwater, hydrochemical characteristics, and quality of groundwater for irrigation from these problems. The data used are primary geoelectrical and chemical groundwater data secondary data used are geological map data, hydrogeology, groundwater basin maps (CAT), and elevation model data (DEM). The method used is the geoelectric Schlumberger configuration, Darcy, DHL, SAR, %Na, and RSC. The results show that the geological layers are tuff, clay, breccia, and sandstone. The discharge potential on track 1 is 2,748 l/s and line 2 is 4.236 l/s. The characteristics of anions and cations exhibit various hydrochemical characteristics. DHL's analysis shows a moderate to high-quality hazard. For the calculation of soil, water sodium is still in a good class and is allowed for irrigation. For the analysis of the sodium absorption ratio (SAR) method, the research site is still in the water class which is very good for irrigation, while the sodium carbonate residue (RSC) method at the study site cannot be used for irrigation because the risk of increasing salt levels is very high.Desa Pelem, Kecamatan Bungkal, Kabupaten Ponorogo adalah lokasi yang terdampak kekeringan pada saat musim kemarau dan mengandalkan hujan untuk kebutuhan irigasi. Dari permasalahan tersebut maka dilakukan penelitian untuk mengetahui struktur geologi, potensi air tanah karakteristik hidrokimia dan kualitas air tanah untuk irigasi. Data yang digunakan merupakan data primer geolistrik dan kimia air tanah untuk data sekunder yang digunakan adalah data peta geologi, hidrogeologi, peta cekungan air tanah (CAT) dan data elevasi model (DEM). Metode yang digunakan adalah metode geolistrik schlumberger, darcy, DHL, SAR, %Na dan RSC Hasil penelitian menunjukkan lapisan geologi berupa tufa, lempung, breksi, dan batu pasir. Potensi debit pada lintasan 1 sebesar 2.748 l/det dan lintasan 2 sebesar 4.236 l/det. Karakteristik anion dan kation menunjukkan berbagai karakteristik hidrokimia. Analisa DHL menunjukkan bahaya salitas sedang sampai tinggi. Untuk perhitungan sodium air tanah masih ada di kelas yang baik dan diizinkan untuk irigasi. Untuk analisa metode rasio serapan natrium (SAR) lokasi penelitian masih di kelas air yang sangat baik untuk irigasi sedangkan pada metode residu natrium karbonat (RSC)  pada lokasi penelitian tidak dapat digunakan untuk irigasi karena resiko peningkatan kadar garam sangat tinggi 
Co-Authors Bima Aji Pangestu Emma Yuliani Irsyad Musthofa Yahya Moh Sholichin Muhammad Fariz Kasyful Haq Pitojo Tri Juwono Reja Palevi Al Huda Very Dermawan