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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.
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 Agastya, Dewandha Mas Agus Suroso Akbar, Andi Rahman Akmaluddin Akmaluddin Andari Putri, Ni Putu Ayu Satya Anwar, Ihza Izaldi Arini, Nyoman Ayu Aryanto, Bagus Prabowo Avriliani, Salsabila Baiq Susdiana Fibrianti Budi Waluyo Budianto, M Bagus Budianto, Muh Bagus Budianto, Muh. Bagus Budiarti, Wiwin Dewi, Evrianti Syntia Eko Pradjoko EMI SALMAH Eniarti, Miko Ery Setiawan Ery setiawan Fajira, Era Fathiyyah, A.J. Fauzia, Isna Firdaus, Muhamad Arsya Maulana Frasitio, Rizal Hadi Grahestika, Ni Ketut Laksmi Hamzanwadi, Robi Hardi Pratomo Hariyadi, Hariyadi Hartana Hartana, - Hartana, Hartana Hasyim Hendrawan Hendrawan Hidayat, Ari Ramadhan Humairoh Saidah I Dewa Gede Jaya Negara I Wayan Yasa, I Wayan Jauhar Fajrin, Jauhar Jaya Negara, I Dewa Gede JAYANEGARA, I DEWA GEDE Julkifli Karyawan, I Dewa Made Alit Khakiki, Bintang Dwi Nur Khaliilulrahman, Khaliilulrahman Kosim Kusuma, Rr. Widyawati Tresna M.A. Muazar Habibi Mahendra, Made Merdana, I Nyoman Muflihah Isnawati Muhajirah Muliadi, Lalu NEGARA, I D G JAYA Niseng, Zakee Pathurahman PRACOYO, ATAS Pradjoko , Eko Prihatin, Yulianto Saputra Putra, Adeyong Wira Rahayu, Nita Agustini Rahmatun, Dwiana Aulya RAI K W, I G AGUNG NGURAH Ramdani, Nofi Rohani Salehudin, Salehudin Sari, Nopia Puspita Solihin, Muhammad Anhar Sudirman, H Suparjo Supriyadi , Anid SUPRIYADI, ANID Suryawan Murtiadi, Suryawan Taufik, Baiq Nabila Teti Zubaidah Triyani, Wiwin Akarena Utami, Fadillah Rabbiatul Veithzal Rivai Zainal Wibowo, Nazwa Rizka Wilujeng, Putri Rahayu WIRADARMA, LALU WIRAHMAN Yayuk Andayani Yuni Pantiwati Yusron Saadi Zainudin, Rahman