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All Journal Jurnal Teknik Sipil Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil
Juliana, Imroatul Chalimah
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Civil Engineering, Building, Construction & Architecture Engineering Transportation

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Analisis Tarif Air PDAM Untuk Kelayakan Penerapan Sistem Pemanenan Air Hujan pada Skala Rumah Tangga: Drinking Water Tariff Analysis For The Feasibility of Implementing Rainwater Harvesting Systems at The Household Scale Juliana, Imroatul Chalimah; Taufik Ari Gunawan; Siti Aisyah Nurjannah; Eric Ho
Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol. 11 No. 2 (2022): Cantilever
Publisher : Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35139/cantilever.v11i2.119

Abstract

The limited availability of clean water is a problem that often occurs lately. Water use continues to increase due to population growth and technological developments. The availability of abundant rainwater and the application of a rainwater harvesting system are alternatives for water fulfillment as water supplies are limited. Rainwater harvesting system performance simulation modeling is essential in deciding the suitability of rainwater harvesting systems. In this study, the rainwater harvesting system simulation modeling was carried out using the Yield Before Spillage (YBS) algorithm in 3 cities in Indonesia (Palembang City, Bogor City, and Mataram City). This assessment considers 5 combinations of demand, 5 combinations of catchment area, 5 tank capacities, and 3 applicable water rates, resulting in 1,875 different value configurations. The performance and potential assessment of the rainwater harvesting system are determined by Water Saving Efficiency and Timetric Reliability, while the financial assessment is determined using the payback period and benefit-cost ratio. Benefits are derived from the potential for water savings with a rainwater harvesting system which is converted into financial savings according to the prevailing water rates and costs are determined based on the initial installation costs of the rainwater harvesting system. The results of this study indicate that the city of Bogor with an average rainfall of 3805.95 mm/year has the highest WSE rate of 100% and the fastest payback period is 4 years. Palembang City with an average rainfall of 2551.57 mm has the highest WSE rate of 99,273% and the fastest payback period is 5.42 years. Mataram, with an average rainfall of 1661.79 mm, has the highest WSE rate of 91.752% and the fastest payback period is 8.17 years. Topographical conditions and rainfall greatly affect the performance of the rainwater harvesting system.
Driving Forces of Landscape Pattern Evolution due to Land Use Changes in the Kambang Iwak Kecik Catchment, Palembang Muthmainah, Nyimas Atika Marwiyah; Putranto, Dinar Dwi Anugerah; Juliana, Imroatul Chalimah
Jurnal Teknik Sipil Vol 25, No 3 (2025): Vol 25, No 3 (2025): JURNAL TEKNIK SIPIL EDISI AGUSTUS 2025
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v25i3.95821

Abstract

Rapid urban development in Palembang has significantly increased surface runoff due to reduced infiltration areas, raising flood risks in low-lying zones. The Kambang Iwak Kecik Retention Pond plays a critical role in capturing runoff from its surrounding catchment. This study identifies the contributing watershed areas and estimates flood discharges under design rainfall conditions. A GIS-based approach delineated seven sub-watersheds using Digital Elevation Model (DEM) data and flow direction analysis. Design rainfall intensities for return periods of 2"“50 years were derived from Gumbel and Log Pearson Type III distributions. Peak discharges, calculated using the Modified Rational Method, ranged from 0.04 to 0.38 m ³/s across sub-catchments. The total flood volume for a 10-year event exceeded the existing storage capacity of the retention pond, indicating a critical capacity deficit. These findings emphasize the importance of spatial-hydrological modelling in developing adaptive drainage strategies to enhance urban flood resilience.
Co-Authors Dinar Dwi Anugerah Putranto Eric Ho Muthmainah, Nyimas Atika Marwiyah Siti Aisyah Nurjannah Taufik Ari Gunawan