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All Journal Jurnal Ilmiah Elektronik Infrastruktur Teknik Sipil Jurnal Spektran JURNAL TEKNOLOGI LINGKUNGAN Journal of Degraded and Mining Lands Management Jurnal Rekayasa Sipil dan Lingkungan JRST (Jurnal Riset Sains dan Teknologi) Astonjadro Jurnal Sains Riset Jurnal Talenta Sipil Sainteks: Jurnal Sain dan Teknik
I PUTU GUSTAVE SURYANTARA PARIARTHA
Program Studi Teknik Sipil Universitas Udayana
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Social Sciences Transportation

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The Evaluation of Palasari Reservoir Water Balance for Palasari Irrigation Area by Using RIBASIM Lelyana, Novia; Arsana, I Gusti Ngurah Kerta; Pariartha, I Putu Gustave Suryantara
ASTONJADRO Vol. 15 No. 1 (2026): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v15i1.19650

Abstract

One of the attempts to manage water resources is to build dams. One of the large dams in Indonesia, the Palasari Dam, which is located in Bali Province, was built in 1987 - 1989. The utilization purpose of the Palasari Dam is to irrigate the planned Palasari Irrigation Area in the amount of 1,300 Ha. However, the Palasari Reservoir challenges sedimentation and a lowering of storage water level, especially during the drought. This condition inflicts disruption of water availability. In the face of scarcity of water resources, it is necessary to explore water availability for efficient and effective distribution. In optimizing reservoirs, operational simulation analysis to determine the reliability of reservoir operations can use RIBASIM (River Basin Simulation) software by evaluating the results of the composition and distribution of water discharge. This research aims to evaluate the irrigation inflow released by the operation of the Palasari Reservoir to serve the Palasari Irrigation Area. Calculations for irrigation water demand in the Palasari Irrigation Area were carried out by the existing global crop plan, as well as modeling simulations with six rice field plots that were irrigated directly by the Palasari Reservoir using RIBASIM. Based on the results of model simulations, the existing discharge cannot fulfill water demands in the Palasari Irrigation Area. Hereafter, with the simulated annual average irrigation water demand of the Palasari Irrigation Area of 9.915 Mcm (0.314 m3/s), it still runs into a water shortage of 4.049 Mcm (0.128 m3/s) with a shortage rate of 40.76%.
Impact of land use change on land degradation and hydrological response in the Mati Watershed for sustainable management Jayantari, Made Widya; Eryani, I Gusti Agung Putu; Pawana, I Gusti Ngurah Agung; Pariartha, I Putu Gustave Suryantara
Journal of Degraded and Mining Lands Management Vol. 13 No. 2 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.132.9803

Abstract

Land-use change is one of the factors contributing to land degradation. Land degradation is characterized by a decrease in vegetation cover, leading to reduced infiltration capacity and increased surface runoff. The Mati Watershed is one of the watersheds in Bali Province that has experienced land changes with a rapid increase in built-up land from 2017 to 2024. Sentinel land cover data serve as remote sensing data that may be applied to the investigation of land transformation. The SWAT+ model is used to simulate changes in hydrological responses resulting from land-use changes. This research initiative aims to characterize the implications of land-use transformations on hydrological dynamics in the Mati watershed, thereby supporting sustainable management methodologies. The SWAT+ model encompasses two land-use scenarios from 2017 and 2014, which were examined using Sentinel land-cover data. The results show significant land use changes in the Mati Watershed, where the built-up area reached 92% of the total watershed area in 2024. This change is causing land degradation in the Mati River watershed, leading to changes in the Mati River’s flow rate. Most channels showed increases of 0.0004–0.0275 m³/s, with the most significant increase in downstream channels 18–20 (up to 0.0420 m³/s). Reduced infiltration capacity due to land-use changes leads to less rainwater absorption and increased surface runoff, increasing the risk of soil erosion and land degradation. To address this issue, sustainable management is needed, emphasizing increased groundwater recharge through low-impact development to reduce surface runoff and minimize environmental degradation in the watershed.
Chlorophyll-a Analysis in the Coastal Waters of Nusa Lembongan using Sentinel-2 Image Data Sagung Putri Chandra Astiti; I Gusti Ngurah Kerta Arsana; I Putu Gustave Suryantara Pariartha
JRST (Jurnal Riset Sains dan Teknologi) Volume 9 No. 2 September 2025: JRST
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/jrst.v9i2.24323

Abstract

Nusa Lembongan is a potential area for seaweed cultivation and is the largest commodity producing the best seaweed on the island of Bali. This shows that the waters in Nusa Lembongan are included in fertile waters. One indicator in determining the level of fertility in a water area is by analyzing the chlorophyll-a value. One method for analyzing the chlorophyll-a value is using remote sensing methods. The image data used in this study were Sentinel-2A and Sentinel-2B level 1C image data. The calculation of chlorophyll-a analysis used the Case 2 Regional Coast Color (C2RCC) processor. The C2RCC processor used in the analysis is included in the Sentinel Application Platform (SNAP) application. The results of the analysis showed that the chlorophyll-a value in the dry season was higher than in the rainy season. The maximum value of chlorophyll-a analysis in the dry season was 40.92 mg/m3 while the maximum value of chlorophyll-a analysis in the rainy season was 40.89 mg/m3. The locations with the highest chlorophyll-a values ​​in the coastal waters of Nusa Lembongan are in the mangrove forest ecosystem in Jungutbatu Village, seaweed cultivation in Lembongan Village and coral reef ecosystem in Tanjung Ental.
Co-Authors A. A. Diah Parami Dewi Abd. Rahman As-syakur AYUB BENNY KRISTIANTO Corry Fanny Bethania Dewa Ketut Sudarsana I Bagus Arya Cahyadi I Gede Indra Mahardika I Gusti Agung Adnyana Putera I Gusti Agung Putu Eryani I Gusti Bagus Sila Dharma I Made Agus Dwi Hadryana I Made Krisna Udiana I Nyoman Norken I Nyoman Sutarja I Wayan Deny Yoga Pratama Jayantari, Made Widya Lelyana, Novia Mawiti Infantri Yekti Ni Made Krisna Werdi Ni Nyoman Pujianiki Pawana, I Gusti Ngurah Agung Putu Gita Widiarsini Sagung Putri Chandra Astiti Sara Sulistya - Suryawan, M. Alit Yasa, I Putu Bagus Reka Sugita Yenni Ciawi