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Journal : Indonesian Journal of Multidisciplinary Science

Analysis Of Land Erosion Hazard Level In The Babak River Watershed Using The Usle Method Andari Putri, Ni Putu Ayu Satya; Setiawan, Ery; Suroso, Agus; Sulistiyono, Heri
Indonesian Journal of Multidisciplinary Science Vol. 4 No. 10 (2025): Indonesian Journal of Multidisciplinary Science
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/ijoms.v4i10.1158

Abstract

The Babak watershed is considered a high utility watershed that has strategic functions. With its very diverse functions, this watershed is not immune from various problems such as land conversion which results in critical lands, narrowing of river channels and sedimentation. Land degradation by erosion contributes an important role to high sedimentation. This research aims to calculate the amount of erosion and determine of erosion hazard level in the Babak watershed. To estimate the amount of erosion, the Universal Soil Loss Equation (USLE) method is used. The amount of erosion in the Babak watershed is assessed through the 9 weirs in the Babak watershed, namely Jengguar, Babak, Gde Bongoh, Keru, Simbe, Jurang Sate, Gebong, Datar and Baturiti weirs. The results of the analysis show that the amount of erosion that occurred at the weir was respectively 92,399 tons/ha/year, 86,828 tons/ha/year, 87,193 tons/ha/year, 72,074 tons/ha/year, 55,534 tons/ha/year, 112,123 tons/ha/year, 33,756 tons/ha/year, 32,935 tons/ha/year, and 34,073 tons/ha/year. Based on classification results is known that the dominant level of erosion hazard in the Babak watershed is very light to moderate. Gebong, Datar and Baturiti weirs are dominated by a very light erosion hazard level (I) with a total area spread of 56.889%, 59.715% and 67.13% respectively. Jengguar, Gde Bongoh, Keru and Simbe weirs are dominated by light erosion hazard level (II) with a total area spread of 41.454%, 42.272%, 45.684% and 49.468% respectively.
Irrigation Water Supply Optimization Model in Jurang Batu Irrigation Area, Central Lombok District Putri, Ni Komang Triya Apriani Paramitha; Setiawan, Ery; Pracoyo, Atas
Indonesian Journal of Multidisciplinary Science Vol. 4 No. 10 (2025): Indonesian Journal of Multidisciplinary Science
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/ijoms.v4i10.1164

Abstract

The Jurang Batu Irrigation Area is an irrigation area located in Central Lombok Regency. The Jurang Batu Irrigation Area is one of the service areas of the Jangkok-Babak High Level Diversion (HLD) Canal. The HLD canal is an interconnection channel between watersheds on Lombok Island, its purpose is to supply excess water from the Jangkok watershed to the southern Lombok irrigation area. The uneven water allocation conditions in the HLD system cause downstream areas to often experience water crises, so the construction of the Meninting Dam is expected to be able to increase the supply of discharge to the South Lombok region. The Meninting Dam will later replace the irrigation discharge in part of the Sesaot Irrigation Area area so that by replacing some of the water in the Sesaot Irrigation Area, it is expected that the Jangkok - Babak HLD supplementary discharge can be increased. From the analysis results, it is known that the average discharge obtained by the Jurang Batu Irrigation Area from the additional water allocation after the construction of the Meninting Dam is 69.15 lt / second, and after optimization, alternative II, namely with AMT December II, is the most optimal alternative, with the acquisition of agricultural profits of Rp. 88,152,598,737.74 (eighty eight billion one hundred fifty two million five hundred ninety eight thousand seven hundred thirty seven point seventy four rupiah).
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.
Co-Authors Adriansyah, Ahmad Ardi Agastya, Dewandha Mas Agus Suroso Agustono Setiawan Ananta, Dian Andalan, Aldi Andari Putri, Ni Putu Ayu Satya Arisma, Baiq Haemi Ascobat Gani Asrul Sani Buan Anshari Budianto, M Bagus Budianto, Muh Bagus Budianto, Muh. Bagus Chandra, Levina Desi Widianty Desi Widiyanti Dewi, Evrianti Syntia Didi Supriyadi Agustawijaya Eko Pradjoko Eniarti, Miko Firdaus Hafidz As Shidieq Ghaisani, Salsa Fajrina Grahestika, Ni Ketut Laksmi Hartana Hartana, Hartana Hasbullah Thabrany hasyim, hasyim Heri Sulistiyono, Heri Hidayati, Nufalia Hulwah, Khairun Nisa il Humairoh Saidah I Dewa Gede Jaya Negara I Wayan Yasa, I Wayan I Wayan, Yasa Indra Wahyu, Indra Iswani, Fahrona Jaya Negara, I D G JAYANEGARA, I DEWA GEDE Karyawan, I Dewa Made Alit Kholilaturrohmi, Siti Kurniawaty, Golda Mahendra, Made Mala, Hairul Mas Agastya, Dewandha Megawati Megraini, Amila Negara, IDG Jaya Nurhidayah Nurwahyuni, Atik P, Vetty Yulianty PRACOYO, ATAS Pratama, M. Hengky Pujiyanti, Eka Putri, Ni Komang Triya Apriani Paramitha putri, septiara Ramadani, Royasia Viki Ratna Yuniarti Rohani Saidah, Humairoh Saldi, Siti Rizny F. Salehudin Salehudin, Salehudin Salsabila, Fera Fitri Salsabila, Zelvia Sari, Euis Ratna Sari, Nopia Puspita Sindu Setia Lucia, Sindu Setia Siti Nurlatifah, Siti Sucahya, Purwa K Sukma, Dwi Mahenra Suparjo SUPRIYADI, ANID Suwandi, Indah Pratiwi Syntia Dewi, Evrianti Trisasi Lestari, Trisasi Umi Luthfiah, Umi WIRADARMA, LALU WIRAHMAN Yusron Saadi Zahrina, Zahrina Zainudin, Rahman