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All Journal Jurnal Ilmiah Telsinas Elektro, Sipil dan Teknik Informasi
Luh Ayu Putri Wedayanti Pulasari
Udayana University, Indonesia
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering

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The Influence of Subak Farmer Groups on Weir Intake Operations Ida Bagus Gede Indrayana; Luh Ayu Putri Wedayanti Pulasari; I Wayan Shanjaya Dharmaputra
Jurnal Ilmiah Telsinas Vol 9 No 1 (2026)
Publisher : Universitas Pendidikan Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38043/telsinas.v9i1.7584

Abstract

Subak is a traditional irrigation management system in Bali that integrates social, religious, and technical dimensions within agricultural practice through collective agreements among farmers. This study examines the influence of Nabdab Yeh, the water allocation mechanism employed by the Subak institution on the intake operation of Mambal Weir, which supplies irrigation water to 43 Subak units within the Tukad Ayung Irrigation Area. Quantification Analysis I was applied to assess the impact of four principal determinants, namely antecedent precipitation, ponding depth, water demand, and Paddy cultivation percentage. Each determinant was systematically categorized and converted into binary variables to formulate a predictive model. The resulting model yielded an R-total value of 0.78, indicating a strong correlation and high predictive accuracy. Partial correlation analysis revealed that antecedent precipitation (R-partial = 0.515) exerted the most dominant influence, followed by ponding depth (0.470), while water demand (0.249) and Paddy percentage (0.220) demonstrated comparatively lower significance. These findings affirm that climatic and hydrological conditions constitute the primary determinants governing intake operations, whereas agricultural cropping patterns function as an adaptive response to prevailing water availability. The developed model provides a scientific basis for adaptive irrigation management while sustaining the local ecological wisdom inherent to the Subak system.
Sedimentation Dynamics and Sustainable Lake Management: Integrating Bathymetric Analysis and Tri Hita Karana in Lake Tamblingan Luh Ayu Putri Wedayanti Pulasari; I Dewa Ayu Meia Damayanthi; Ni Luh Putri Prabandari
Jurnal Ilmiah Telsinas Vol 9 No 1 (2026)
Publisher : Universitas Pendidikan Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38043/telsinas.v9i1.7585

Abstract

Lakes play an important role in supporting freshwater resources, ecosystems, and socio-cultural activities. However, increasing sedimentation has become a major environmental issue that can affect lake morphology and ecological functions. This study aims to analyze sediment accumulation in Lake Tamblingan and interpret its implications using the Tri Hita Karana framework. Bathymetric surveys were conducted using a Midas Valeport single-beam echosounder with 200 m transect spacing. The data were processed using Civil 3D and ArcGIS to generate bathymetric maps for 2023 and 2024, and sediment thickness was estimated through depth comparison. The results show that Lake Tamblingan experienced sediment accumulation reaching approximately 1,56 m, indicating a significant lake shallowing process. This condition may reduce lake storage capacity, increase turbidity, and potentially affect ecological stability as well as socio-cultural activities surrounding the lake. Integrating bathymetric analysis with the Tri Hita Karana perspective highlights the importance of holistic lake management that considers environmental, social, and spiritual dimensions.
Co-Authors I Dewa Ayu Meia Damayanthi I Wayan Shanjaya Dharmaputra Ida Bagus Gede Indrayana Ni Luh Putri Prabandari