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All Journal Jurnal Rekayasa Sipil dan Lingkungan Jurnal Ilmiah Teknik Sipil Open Access DRIVERset
Ida Bagus Gede Indrayana
Universitas Udayana
Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Engineering Environmental Science Transportation

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Evaluasi Lokasi Titik Banjir di Sub Sistem III Kota Denpasar Berbasis Geographic Information System Mawiti Infantri Yekti; Ida Bagus Gede Indrayana; I Gusti Ngurah Kerta Arsana
Jurnal Rekayasa Sipil dan Lingkungan Vol 5 No 2 (2021): Jurnal Rekayasa Sipil dan Lingkungan
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jrsl.v5i2.23682

Abstract

The inability of the channel capacity to accommodate surface runoff can cause flooding. The Pangkung Lebak Muding channel, which is part of the Tukad Mati watershed, still experienced flooding from 2009 to 2019. Evaluation of flood points in the Pangkung Lebak Muding channel was carried out by comparing the capacity of the existing channel with the design discharge, then determining the capacity of the new channel. Initial channel mapping using Google Earth and GIS applications. The evaluation results are remapped to compare and display differences in flood points. The identification results show that there are 9 flood points for a 2 year return period and 10 points for a 5 to 10 year return period in secondary and tertiary canals. While in the primary channel there are 2 flood points for all return times. The solution to evaluating the capacity of this channel is dredging to a depth of 0.46 m for the secondary and tertiary channels and 1 m for the primary channel. The evaluation results show that all secondary and tertiary channels are not flooded in all return periods. ABSTRAK Ketidakmampuan kapasitas saluran untuk menampung limpasan permukaan dapat menyebabkan banjir. Saluran Pangkung Lebak Muding yang merupakan bagian DAS Tukad Mati, masih mengalami banjir dari tahun 2009 sampai 2019. Evaluasi titik-titik banjir pada saluran Pangkung Lebak Muding dilakukan dengan membandingan kapasitas saluran eksisting dengan debit desain, lalu menentukan kapasitas saluran baru. Pemetaan saluran awal menggunakan aplikasi Google Earth dan GIS. Hasil evaluasi dipetakan kembali untuk membandingkan dan menampilkan perbedaan titik banjir. Hasil identifikasi menunjukan terdapat 9 titik banjir untuk kala ulang 2 tahun dan 10 titik untuk kala ulang 5 sampai 10 tahun pada saluran sekunder dan tersier. Sedangkan pada saluran primer terdapat 2 titik banjir untuk semua kala ulang. Solusi dalam evaluasi kapasitas saluran ini dilakukan pengerukan sedalam 0,46 m untuk saluran sekunder dan tersier dan 1 m untuk saluran primer. Hasil evaluasi menunjukan semua saluran sekunder dan tersier tidak banjir pada seluruh kala ulang.
EVALUATION OF REAL NEEDS NUMBER FOR OPERATION AND MAINTENANCE OF DAMS IN BALI PROVINCE Fransisca Natania Karina Rediasti; Ida Bagus Gede Indrayana; Kurniawan Putra Santoso
Jurnal Ilmiah Teknik Sipil Vol. 28 No. 2 (2024): Jurnal Ilmiah Teknik Sipil, Vol. 28 No. 2, September 2024
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2024.v28.i02.p09

Abstract

An increase in population by 1.04% and crop area by 14.08% in Bali Province, will also increase the water needs. Dam as water infrastructure that supports water availability, is needed in overcoming the problem. Dams require operation and maintenance (O&M) to keep function optimally. Operation and maintenance costs need to be evaluated periodically with the real needs of operation and maintenance. Real needs of operation and maintenance suitability can guarantee the optimal functioning of the dam. This study evaluated the suitability of Balinese dam’s operation and maintenance, namely Benel Dam, Telaga Tunjung Dam, Gerokgak Dam, and Palasari Dam. Dam performance appraisals include physical, operational security, and institutional ranging from 0 to 100. The results the grouped into good, enough, less, and bad category. All four dams got “enough”, so their real needs number for operation and maintenance need to be evaluated. The evaluation showed that Gerogkak Dam had the largest real needs number for operation and maintenance value, which is IDR 28,767,099,149. The real needs of operation and maintenance value is consisted of ≥ 90% dredging’s cost. Dredging’s cost us mainly influenced by sediment’s volume. So, to reduce sediment’s volume and improve dam’s performance for irrigation, it is necessary to increase the efficiency of dam’s operation and maintenance. Efficient dam operation also necessary due to the limited operators. Building efficiencies that control sediment and water supply, must be increase aligned with water needs and reservoir conditions.
EVALUATION OF REAL NEEDS NUMBER FOR OPERATION AND MAINTENANCE OF DAMS IN BALI PROVINCE Fransisca Natania Karina Rediasti; Ida Bagus Gede Indrayana; Kurniawan Putra Santoso
Jurnal Ilmiah Teknik Sipil Vol. 28 No. 2 (2024): Jurnal Ilmiah Teknik Sipil, Vol. 28 No. 2, September 2024
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2024.v28.i02.p09

Abstract

An increase in population by 1.04% and crop area by 14.08% in Bali Province, will also increase the water needs. Dam as water infrastructure that supports water availability, is needed in overcoming the problem. Dams require operation and maintenance (O&M) to keep function optimally. Operation and maintenance costs need to be evaluated periodically with the real needs of operation and maintenance. Real needs of operation and maintenance suitability can guarantee the optimal functioning of the dam. This study evaluated the suitability of Balinese dam’s operation and maintenance, namely Benel Dam, Telaga Tunjung Dam, Gerokgak Dam, and Palasari Dam. Dam performance appraisals include physical, operational security, and institutional ranging from 0 to 100. The results the grouped into good, enough, less, and bad category. All four dams got “enough”, so their real needs number for operation and maintenance need to be evaluated. The evaluation showed that Gerogkak Dam had the largest real needs number for operation and maintenance value, which is IDR 28,767,099,149. The real needs of operation and maintenance value is consisted of ≥ 90% dredging’s cost. Dredging’s cost us mainly influenced by sediment’s volume. So, to reduce sediment’s volume and improve dam’s performance for irrigation, it is necessary to increase the efficiency of dam’s operation and maintenance. Efficient dam operation also necessary due to the limited operators. Building efficiencies that control sediment and water supply, must be increase aligned with water needs and reservoir conditions.
Co-Authors Fransisca Natania Karina Rediasti Kurniawan Putra Santoso Mawiti Infantri Yekti