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STRUKTUR DAN KOMPOSISI JENIS TUMBUHAN PADA HUTAN RAKYAT TONGKONAN LEMBANG TURUNAN KECAMATAN SANGALLA KABUPATEN TANA TORAJA Wahyudi, Wahyudi; Sudiyanto, I wayan; Nirawati, Nirawati
Jurnal Eboni Vol 6 No 2 (2024): November
Publisher : Program Studi Kehutanan Universitas Muslim Maros

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46918/eboni.v6i2.2584

Tongkonan community forest has an important role in Torajanese livelihood. The forest could serve daily needs and diverse ceremonial materials for local people. The existence of this forest also has an ecological function in soil and water preservation. This research aims to study the structure and composition of vegetation in tongkonan community forest and determine the useful plant species for the local people. The research method was done by counting and identifying plants in plot samples for the study of the plant community structure and composition and brief interviews with the local people to reveal the purpose of the plant species. There are 30 plants species that found in plot samples belongs to 28 genera and 18 families. According to the family level, the dominant plant species in observation were Fabaceae (14,28 %) and Myrtaceae (10,71 %). Pine tree (Pinus merkusii) had the highest basal area of 7163.054 cm2 and the species with the highest Important Value of 35.486 %. Several species, however commonly cultivated in this area such as kakao (Theobroma cacao) and kopi (coffea robusta). Generally in the village, around 35 plant species (51,47 %) are used as a source of food, while 39 species (57,35 %) are used for other purposes, such as traditional medicine, firewood, materials for tools and crafting, and ornamental plant species.

Flood Mitigation Strategy Based on Hydrological and Hydraulic Modelling in the Urban Area Molo, Hasanuddin; Sudiyanto, I Wayan; Amaliah, Rizki; Fathoni, Ahmad; Azis, Sri Misykat
Journal La Lifesci Vol. 6 No. 1 (2025): Journal La Lifesci
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallalifesci.v6i1.2274

The urgency of this research lies in the need for a scientific-based solution in understanding the pattern of runoff and flood inundation to support effective mitigation planning. This study aims to analyze the characteristics of the Tallo River runoff before and after infrastructure development; identify the main factors causing flood inundation in the affected area and develop flood mitigation strategies based on hydrological and hydraulic modeling. The methods used include data collection using 15 years of rainfall data (2010–2024), topographic maps (DEM), and land use information; hydrological analysis by calculating the design flood discharge using the Rational and Nakayasu methods; hydraulic modeling with HEC-RAS 2D flood inundation simulation to understand the pattern of inundation distribution due to increasing runoff discharge; evaluation of the impact of development by comparing the runoff discharge before and after development and identifying its contribution to flood risk and mitigation strategies by compiling technical recommendations such as raising the embankment, improving drainage, and increasing the elevation of the affected area. The results of the study indicate that flooding in the Tallo River is mainly caused by the river's inability to accommodate the runoff discharge and the backwater effect of the urban drainage system. The increase in discharge due to the construction of a shopping center was recorded as very small (0.84 m³/second) and was not significant to the occurrence of flooding. The proposed mitigation strategies include building a 2.5-meter high embankment, increasing drainage capacity, and regulating the elevation of the affected area.

Evaluating Urban Flood Risk and Mitigation Strategies Using Hydrological and Hydraulic Modelling: A Case Study Sudiyanto, I Wayan; Molo, Hasanuddin; Azis, Sri Misykat; Fathoni, Ahmad; Wahyudi, Wahyudi
Journal La Lifesci Vol. 6 No. 2 (2025): Journal La Lifesci
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallalifesci.v6i2.2275

This study aims to analyze the characteristics of the Tallo River runoff before and after infrastructure development; identify the main factors causing flood inundation in the affected area and develop flood mitigation strategies based on hydrological and hydraulic modeling. The methods used include data collection using 15 years of rainfall data (2010–2024), topographic maps (DEM), and land use information; hydrological analysis by calculating the design flood discharge using the Rational and Nakayasu methods; hydraulic modeling with HEC-RAS 2D flood inundation simulation to understand the pattern of inundation distribution due to increasing runoff discharge; evaluation of the impact of development by comparing the runoff discharge before and after development and identifying its contribution to flood risk and mitigation strategies by compiling technical recommendations such as raising the embankment, improving drainage, and increasing the elevation of the affected area. The results of the study indicate that flooding in the Tallo River is mainly caused by the river's inability to accommodate the runoff discharge and the backwater effect of the urban drainage system. The increase in discharge due to the construction of a shopping center was recorded as very small (0.84 m³/second) and was not significant to the occurrence of flooding. The proposed mitigation strategies include building a 2.5-meter high embankment, increasing drainage capacity, and regulating the elevation of the affected area. This study is expected to be a reference in flood risk management based on hydrology and hydraulics in urban areas.

Analysis of Land Suitability for Avocado Plants (Persea americana M.) in the Educational Forest of the University of Muhammadiyah Mataram Fathoni, Ahmad; Romansyah, Erni; Gunawan, Adi; Wahyuni, Ida; Karyanik, Karyanik; Sudiyanto, I Wayan
Protech Biosystems Journal Vol 5, No 1 (2025): Protech Biosystem Journal
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/protech.v5i1.31020

The 93.55-hectare Mataram Muhammadiyah University Educational Forest has been enriched with eucalyptus and gaharu plants since 2019. In 2024, further enrichment will be carried out with Durian, Avocado, Jackfruit, and Longan plants. The results of previous studies showed that the development plan for Durian plants has a marginal suitability class or S3. This study aims to determine the suitability class and area of land units for Avocado plants as an alternative choice, limiting factors and economic feasibility analysis. Land surveys using the free grid method on 9 land units and land evaluations by matching 14 parameters of land availability and land requirements for Avocado plants, namely soil conditions, climate, and land. The results of the study showed that land suitability for avocado plants was quite suitable (S2) on 3 land units covering an area of 34.15 Ha with limiting factors being texture, soil depth, Total N, Available K and Slope. The land suitability class was marginally suitable (S3) on 6 land units covering an area of 59.4 Ha with limiting factors being slope and soil depth. The investment cost for enrichment of MPTS avocado plants of 100 trees per hectare is Rp. 6,000,000 per hectare and the estimated return on capital is in the 6th year after planting

Assessment and Spatial Mapping of Soil Degradation Status in Bontoharu District, Selayar Islands Regency: A Framework for Sustainable Land Management Sudiyanto, I Wayan; Wahyudi, Wahyudi
Jurnal Wasian Vol. 12 No. 01 (2025): June
Publisher : Forestry Department, University of Muhammadiyah Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62142/s431wp41

This research conducts a comprehensive spatial assessment of the soil degradation status in the Bontoharu District, Selayar Islands Regency, to facilitate evidence-based sustainable land management strategies. By employing an integrated methodological framework that combines GIS-based spatial analysis, field surveys, and laboratory testing, the study evaluates various parameters, including physical, chemical, and biological properties of the soil. Key environmental factors examined include rainfall patterns, topography, soil typology, and land use practices. Primary data obtained from field sampling was supplemented with secondary data sources, including CHIRPS rainfall data (2014-2023), digital elevation models, and official land use classifications. The findings indicate that while 81.78% of the study area demonstrates low degradation levels, approximately 18.22% encounters significant soil degradation challenges, with 7.85% classified as very critical. The spatial distribution analysis revealed that surface rock fragments, shallow solum depth, and unfavourable soil physical properties are the predominant limiting factors. The areas most vulnerable to degradation correlate with steep slopes (greater than 45%) and intensive agricultural activities. The study outlines spatially explicit recommendations for targeted conservation interventions, including reforestation in critical areas (1,288.42 hectares), community forest development (1,018.54 hectares), organic matter amendments, and enhancement of land use practices. This research highlights the importance of integrated spatial assessments in formulating location-specific conservation strategies and provides a methodological framework that is applicable to similar island ecosystems facing soil degradation challenges.

STRUKTUR DAN KOMPOSISI JENIS TUMBUHAN PADA HUTAN RAKYAT TONGKONAN LEMBANG TURUNAN KECAMATAN SANGALLA KABUPATEN TANA TORAJA Wahyudi, Wahyudi; Sudiyanto, I wayan; Nirawati, Nirawati
Jurnal Eboni Vol. 6 No. 2 (2024): November
Publisher : Program Studi Kehutanan Universitas Muslim Maros

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46918/eboni.v6i2.2584

Tongkonan community forest has an important role in Torajanese livelihood. The forest could serve daily needs and diverse ceremonial materials for local people. The existence of this forest also has an ecological function in soil and water preservation. This research aims to study the structure and composition of vegetation in tongkonan community forest and determine the useful plant species for the local people. The research method was done by counting and identifying plants in plot samples for the study of the plant community structure and composition and brief interviews with the local people to reveal the purpose of the plant species. There are 30 plants species that found in plot samples belongs to 28 genera and 18 families. According to the family level, the dominant plant species in observation were Fabaceae (14,28 %) and Myrtaceae (10,71 %). Pine tree (Pinus merkusii) had the highest basal area of 7163.054 cm2 and the species with the highest Important Value of 35.486 %. Several species, however commonly cultivated in this area such as kakao (Theobroma cacao) and kopi (coffea robusta). Generally in the village, around 35 plant species (51,47 %) are used as a source of food, while 39 species (57,35 %) are used for other purposes, such as traditional medicine, firewood, materials for tools and crafting, and ornamental plant species.

Strategi Penguatan Bank Sampah dalam Implementasi Zero Waste di Indonesia: Pendekatan Berbasis Studi Literatur Sudiyanto, I Wayan; HS, Sri Magfirah
Jurnal Multidisiplin West Science Vol 4 No 02 (2025): Jurnal Multidisiplin West Science
Publisher : Westscience Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58812/jmws.v4i02.2055

Penerapan konsep Zero Waste melalui bank sampah telah menjadi solusi efektif dalam pengelolaan sampah di Indonesia. Penelitian ini membahas peran bank sampah dalam mengurangi timbunan sampah dan meningkatkan kesadaran masyarakat terhadap prinsip Reduce, Reuse, dan Recycle (3R). Studi kasus dari beberapa bank sampah di Indonesia, termasuk bank sampah berbasis komunitas dan swasta, menunjukkan bahwa keberhasilan program ini bergantung pada partisipasi aktif masyarakat, dukungan kebijakan pemerintah, serta inovasi dalam sistem pengelolaan sampah. Meskipun menghadapi tantangan seperti kurangnya infrastruktur dan kesadaran masyarakat yang masih rendah, strategi seperti edukasi lingkungan, insentif ekonomi, dan teknologi pengelolaan limbah telah membantu meningkatkan efektivitas bank sampah. Hasil penelitian ini menegaskan bahwa bank sampah tidak hanya berperan dalam pengelolaan sampah, tetapi juga sebagai instrumen pemberdayaan ekonomi dan sosial bagi masyarakat.

Performance Evaluation of an Anaerobic-Aerobic Biofilter in the Wastewater Treatment System of a Mortuary Facility Sudiyanto, I Wayan; Magfirah HS, Sri; Aeni, Nur; Misykat Azis, Sri; Sattuang, Herlina
ARRUS Journal of Engineering and Technology Vol. 5 No. 2 (2025)
Publisher : PT ARRUS Intelektual Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35877/jetech4429

Mortuary facilities generate wastewater with elevated concentrations of organic matter, suspended solids, oils and grease, ammonia, and microbial contaminants, necessitating effective treatment to mitigate environmental and public health risks. This study evaluates the performance of an anaerobic–aerobic biofilter wastewater treatment plant (WWTP) serving a mortuary facility in Makassar City. Wastewater samples were collected at the influent and effluent points of the system during July and August 2025 and analyzed for BOD₅, COD, TSS, oil and grease, NH₃–N, and total coliforms. The influent wastewater exhibited high pollutant loads (e.g., BOD₅: 58.1–58.4 mg/L; COD: 139.50–140.33 mg/L; TSS: 63.2–64.9 mg/L; NH₃–N: 13.42–13.94 mg/L; coliforms: 9532–9541 CFU/100 mL). Treatment by the biofilter consistently reduced these contaminants, producing effluent concentrations within applicable national standards. Removal efficiencies in July ranged from 45.56–67.81%, while efficiencies in August ranged from 52.11–70.03% for physicochemical parameters. Microbial removal was also effective, achieving 75.55% and 77.58% reduction in July and August, respectively. These findings demonstrate that the anaerobic–aerobic biofilter performs reliably under routine operating conditions, effectively reducing organic pollutants, suspended solids, oils and grease, ammonia, and total coliforms in mortuary wastewater. The system provides compliant effluent quality without additional treatment stages, indicating its suitability for managing medium-strength, high-organic-load wastewater generated by mortuary activities.

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