Nasrul
Universitas Negeri Makassar

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Sebaran Jaringan Penakar Hujan di DAS Jeneberang Menggunakan Metode Polygon Thiessen Haris; Nasrul; Muhammad Arib Musba Amalul; Sulaiman Ziddiq; Misdar Amdah; Medar M. Nur; Rosmini Maru
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 12 No. 2 (2023): Volume 12 Nomor 2 (September 2023)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

The Jeneberang River has a watershed that covering an area of 860 km2. At the same time, the area of the river reaches 9,33 km2 with surface water potential of 13,23 million/year and groundwater potential of 1,504 million/year. The rain gauge network is influenced by several factors, included the rainfall factor, so collecting data on the rain gauge network stations is necessary. Based on this, it is necessary to map the rain gauge network and the optimum value of the rain station. This study uses the Polygon Thiessen method based on statistical principles, which are then presented through maps from processed data using ArcGIS Desktop 10.8. From the results of calculating the average rainfall data for the Jeneberang Watershed using the polygon thissen method, the average regional rainfall in 2011-2020 was 2,958.83 mm and it was obtained that rain stations in the Jeneberang Watershed area with an area of 133,218 km2 should have 6.1 stations and there should be 6 (six) stations.
The Ability Of Green Open Space In Reducing Green House Gas (GHG) Emissions On Jalan Hertasning, Makassar City Arfandi; Muhammad Yusuf; Nasrul; Misdar Amda; Auli Diar Hasja; Rosmini Maru
Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 13 No. 2 (2024): Volume 13 Nomor 2 (September 2024)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

Green Open Spaces (RTH) are urban areas filled with vegetation that support ecological benefits, such as reducing greenhouse gases by absorbing CO₂ through photosynthesis. Although RTH accounts for 66 percent of the area along Jalan Hertasning, its effectiveness in absorbing CO₂ emissions from motor vehicles is not fully understood. Given the high volume of vehicles, especially during peak traffic hours, a deeper understanding of the RTH's capability to reduce CO₂ emissions is necessary. This study aims to measure CO₂ emissions from transportation, assess the RTH's ability to absorb CO₂, and develop effective RTH enhancement strategies. The research location is Jalan Hertasning in Makassar City. The method used in this study is descriptive with a quantitative approach. Results show that CO₂ emissions during peak hours cannot be fully absorbed by the existing 508 Trembles trees, which have a total absorption capacity of 1,652.07 kg/hour and cover an area of 4.4 hectares, or 75.9 percent of Jalan Hertasning. There remains 3,168.59 kg/hour of CO₂ emissions from the total 4,820.66 kg/hour during peak traffic. In addition to Trembles trees, there are other trees like Palm and Terminalia mantaly, which are still growing and not included in this study but could increase the RTH's absorption capacity in the future. The high CO₂ emissions from motor vehicles significantly impact air quality and public health. It is recommended that the government actively conduct environmental awareness campaigns focused on reducing CO₂ emissions and the importance of RTH. These campaigns can be carried out through social media, posters along Jalan Hertasning, and community outreach to reduce CO₂ levels by increasing public participation in maintaining RTH.