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PERENCANAAN PENYEDIAAN AIR MINUM BERBASIS MASYARAKAT DI DUSUN TOMUAN PANE, KABUPATEN SIMALUNGUN, SUMATERA UTARA Andika, Ida Bagus Made Baskara; Nainggolan, Kristina Marta; Astiti, Sagung Putri Chandra
Jurnal Spektran Vol. 14, No. 1, Januari 2026
Publisher : Program Studi Magister Teknik Sipil Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/

Abstract

Tomuan Pane Hamlet in Simalungun Regency, North Sumatra, faces critical challenges in drinking water provision due to the absence of a household water distribution network. Additionally, water quality tests revealed phosphate and total coliform contamination levels exceeding the drinking water standards set by the Indonesian Ministry of Health Regulation No. 2 of 2023. The contamination is attributed to nearby agricultural activities and poorly maintained environmental infrastructure. This study aims to design a simple, community-based water distribution and treatment system (Penyediaan Air Minum Berbasis Masyarakat: PAMBM). Water demand projections were calculated using three population growth methods: arithmetic, geometric, and least square approaches. The distribution network was simulated using EPANET 2.2 software. The water treatment system was designed utilizing simple filtration tailored to local conditions. Population projections indicate that water demand in 2040 will reach 0.88 L/s. The proposed treatment system consists of two filtration stages: a 1.2-meter downflow reactor of 67% zeolite, 8% sand, 8% activated carbon media, and a 2-meter upflow reactor of 21% zeolite, 21% gravel, 27% activated carbon, and 21% sand media:. The combined system effectively reduced phosphate concentrations by 49.39% and completely eliminated total coliforms (100% removal). The distribution network simulation produced an average flow velocity of 0.71 m/s using a 5 cm transmission pipe and a 4 cm main distribution pipe.
Application of New Empirical Algorithm in Coastal Waters of Padanggalak Beach to Detect Total Suspended Solid Value Astiti, Sagung Putri Chandra; Dharma, I Gusti Bagus Sila; Pariartha, I Putu Gustave Suryanthara; As-Syakur, Abd. Rahman; Arsana, I Gusti Ngurah Kerta
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.v15i1.19633

Abstract

Total Suspended Solid is one of the important indicators in the physical parameters to determine the quality status of the waters studied. In this case, researchers will create a new algorithm to detect TSS values ​​at Padanggalak Beach, where the beach is the estuary of the Ayung Watershed. The creation of the algorithm that has been carried out by several researchers took the case in coastal waters, so that the algorithm will cause a fairly high difference in value when applied to other coastal areas. Coastal areas in each place have different characteristics, where coastal areas are dynamic areas, influenced by various factors including climate, weather, wind direction, ocean currents and characteristics of the use of the surrounding environment. Field data taken in the form of seawater samples were then tested in the laboratory to produce TSS concentration values ​​at each sample point. Field observations for TSS sampling in the coastal waters of the Ayung DAS estuary located at Padanggalak Beach were carried out on Wednesday, August 14, 2024 at 08.00 - 10.30 WITA. The form of the new algorithm equation produced along with its correlation level is TSS = -25.096 x (B6/B11) + 42.415, for TSS estimation at Padanggalak Beach. Based on the results of the analysis of the determination coefficient of the New Empirical TSS Algorithm with Insitu TSS, the R2 result was 0.6812. This shows that the results of in situ data and the results of satellite image processing using the New Empirical Algorithm are considered to have a strong correlation relationship, which means that the TSS results from the empirical algorithm are quite in accordance with the TSS results in the field at the Ayung DAS Estuary (Padanggalak Beach).
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.