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Journal : Acitya Wisesa: Journal of Multidisciplinary Research

NUMERICAL ANALYSIS OF PORE WATER PRESSURE, SEEPAGE, AND SLOPE STABILITY DURING MENINTING DAM PRE-IMPOUNDING Mahendro, Jiden Desta; Patriadi, Andi; Wulandari, Esti
Acitya Wisesa: Journal of Multidisciplinary Research [IN PRESS] Vol. 5 Issue 1 (2026)
Publisher : jfpublisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56943/jmr.v5i1.920

Abstract

Meninting Dam in West Lombok represents strategic hydraulic infrastructure requiring comprehensive evaluation of pore water pressure, seepage behavior, and slope stability during the initial impoundment phase. This study evaluates the dam's hydraulic and geotechnical response through numerical simulation using SEEP/W and SLOPE/W software, validated against field instrumentation data. Numerical modeling demonstrates that reservoir elevation increase from 168.50 m to 196.06 m induces elevated pore water pressure within the core zone, with a maximum value of 505.55 kPa recorded at monitoring instrument Pe.3. Concurrently, seepage discharge escalates from a range of 0.00378 to 0.0133 m³/s during initial filling to 0.0637 m³/s at near-normal water level. These hydraulic responses remain within acceptable operational parameters for earthfill dam structures. Slope stability analysis yields safety factors ranging from 2.052 to 2.860, substantially exceeding the minimum regulatory threshold of FS ≥ 1.5 and confirming structural stability under normal operational conditions. The findings recommend enhancement of the instrumentation monitoring protocol and establishment of an early warning system to improve detection capabilities for pore water pressure fluctuations, seepage anomalies, and potential slope instability mechanisms.
ANALYSIS OF WATER DEMAND AND AVAILABILITY IN THE PRUMPUNG WATERSHED, TUBAN Zakariya, Rony; Patriadi, Andi; Wulandari, Esti
Acitya Wisesa: Journal of Multidisciplinary Research [IN PRESS] Vol. 5 Issue 1 (2026)
Publisher : jfpublisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56943/jmr.v5i1.927

Abstract

Water constitutes a vital natural resource supporting human life, agricultural activities, and regional development. Limited water availability coupled with continuously increasing water demand due to population growth and agricultural activities necessitates data-based water resource planning and management. This research aimed to analyze water demand and water availability in the Prumpung Watershed, Tuban Regency, for the 2025-2029 projection period. The research employed a descriptive quantitative approach utilizing population, land use, and rainfall data. Domestic water demand was calculated based on per capita consumption standards and population projections, while non-domestic water demand was calculated from rice field irrigation requirements based on land area and cropping intensity. Water availability was calculated based on surface runoff volume obtained from annual rainfall, runoff coefficient, and watershed area. The analysis results indicate that domestic water demand increases from 2,389,812 m³ in 2025 to 2,491,776 m³ in 2029. Non-domestic water demand increases from 91,034,789.98 m³ to 92,943,134.36 m³, bringing total water demand from 93,424,602.32 m³ to 95,434,910.78 m³. Meanwhile, average annual water availability amounts to 84,586,033.31 m³. The comparison between water demand and water availability demonstrates that water demand exceeds water availability throughout all projection years. Therefore, efforts to improve water use efficiency, particularly in the irrigation sector, and catchment area conservation are required to maintain water resource sustainability in the Prumpung Watershed.