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All Journal Jurnal Sumberdaya Alam dan Lingkungan Jurnal Keteknikan Pertanian Tropis dan Biosistem
Yasa Palaguna Umar, Yasa Palaguna
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Agriculture, Biological Sciences & Forestry Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Mechanical Engineering

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Ambient PM2.5 Transport in Bandar Lampung City: HYSPLIT Model and Meteorological Profile Mustaqiman, Aulia Nur; Umar, Yasa Palaguna; Gustinasari, Kiki; Irawandani, Tia Dwi; Prayogo, Wisnu
Jurnal Sumberdaya Alam dan Lingkungan Vol 11, No 3 (2024)
Publisher : Brawijaya University

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Abstract

ABSTRACT Particulate Matter (PM2.5) is a hazardous air pollutant commonly found in urban areas, where emissions from transportation, industry, and fuel combustion significantly contribute to its concentration, posing serious risks to human health, air quality, and ecosystems. With rapid urbanization (1,073,451 people), transportation activities, and industrial growth, Bandar Lampung faces high PM2.5 concentrations from January to December 2023, up to 10.6 times the WHO threshold limit. This study analyzes the influence of daily meteorological conditions, such as wind speed, humidity, and temperature inversion, on the accumulation of PM2.5 pollutants in Bandar Lampung in 2023, focusing on August as the period with the highest pollution index (ISPU 155). This study utilizes the HYSPLIT application, which analyzes the sources and transport of PM2.5 pollutants based on wind direction. The HYSPLIT model results indicated that pollutants originate from the southeast at an altitude of 500 m and exhibit a more complex pattern at higher altitudes. Low wind speed (2.6 m/s) and low humidity (69%) during the month influenced the accumulation of PM2.5, reaching 53.6 µg/m³, exceeding the national threshold by 10.6 times. This study provided spatial information to support PM2.5 pollution mitigation efforts in Bandar Lampung by using the HYSPLIT model.  Keywords: Bandar Lampung, HYSPLIT, meteorology, PM2.5, wind speed
Analisis Penggunaan Lahan Pada Tingkat Rawan Bencana Erosi Berbasis di Taman Nasional Gunung Rinjani Nusa Tenggara Barat Umar, Yasa Palaguna; Lestari, Tri Fitria Indah; Anugroho, Fajri
Journal of Tropical Agricultural Engineering and Biosystems - Jurnal Keteknikan Pertanian Tropis dan Biosistem Vol. 12 No. 3 (2024): December 2024
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

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Berdasarkan studi literatur yang dilakukan, tanah yang berada di kawasan Taman Nasional Gunung Rinjani (TNGR) memiliki bahan induk penyusun berupa pasir volkan dan abu. Hal tersebut menyebabkan potensi terjadinya erosi di kawasan TNGR akan meningkat, terutama pada saat musim hujan berlangsung. Hal ini dikarenakan energi kinetik dari air hujan akan memecah agregat tanah dan menyebabkan terjadinya erosi dengan faktor pendukung berupa kemiringan dan vegetasi. Oleh karena itu penelitian kali ini bertujuan untuk menghitung prediksi laju erosi di kawasan TNGR pada tahun 2024 berbasis metode spasial berdasarkan data 10 tahun terakhir dan memberikan rekomendasi konservasi pada jenis potensi erosi. Metode perhitungan yang digunakan adalah Universal Soil Lost Equation (USLE) dengan menggunakan pendekatan spasial berupa overlay data dari setiap faktor yang digunakan meliputi erosivitas hujan (R), erodibilitas tanah (K), panjang dan kemiringan lereng (LS) serta faktor vegetasi dan pengelolaan lahan (CP). Adapun potensi erosi tersebut diklasifikasikan menjadi beberapa kelas yaitu kelas sangat ringan dengan rentang 0-15 ton/ha/tahun yang mencakup 52% dari area TNGR, kelas ringan dengan rentang 15-60 ton/ha/tahun yang mencakup 13%, kelas sedang dengan rentang 60-180 ton/ha/tahun yang mencakup 18% dari area TNGR, kelas berat dengan rentang 180-480 ton/ha/tahun yang mencakup 12% dari area TNGR dan kelas sangat berat dengan rentang >480 ton/ha/tahun yang mencakup 5% dari area TNGR. Dari hasil pemetaan potensi erosi diberikan beberapa rekomendasi upaya konservasi untuk mengendalikan dan meminimalisir laju erosi di TNGR dengan menggunakan metode kombinasi (mekanik-vegetatif) berupa matras kawat dan tanaman Heteropogon contortus serta dengan menggunakan metode vegetatif.
Optimization of a Dual-Stage Filtration Unit Using Cation Resin, Zeolite, and Activated Carbon for Limewater Treatment in Mulyosari Hamlet, Malang Regency Fauzi, Rachmad Pratama; Sulianto, Akhmad Adi; Umar, Yasa Palaguna
Jurnal Sumberdaya Alam dan Lingkungan Vol 12, No 1 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jsal.2025.012.01.2

Abstract

ABSTRACT Access to potable water remains a critical challenge in rural limestone regions such as Mulyosari Hamlet, Malang Regency, where groundwater is often contaminated by high levels of calcium carbonate, total dissolved solids, and alkalinity. This study aimed to evaluate the effectiveness of a simple water filtration system utilizing locally available media to reduce these contaminants and achieve compliance with national drinking water standards. The filtration unit consisted of two cylinders filled with cation exchange resin, silica sand, activated carbon, and natural zeolite, and was tested over a four-month dry season period. Groundwater samples were collected before and after treatment for chemical and hydraulic analysis. Results showed significant reductions in total dissolved solids from 396 to 182 mg.L-1 (54%), calcium carbonate from 424 to 228 mg.L-1 (46%), and alkalinity from 298 to 48 mg.L-1 (84%). Boiling the filtered water further improved water quality. The system maintained a steady discharge rate of 1.4 m³.h-1 and hydraulic retention times between 13.1 and 26.2 seconds, with minimal head loss. These findings confirm that the simple filtration system is both technically feasible and economically viable for household application, offering substantial benefits for water quality improvement and public health in rural limestone-affected communities. Keywords:  lime water, mulyosari hamlet, environmental health, simple water filtration, drinkable water 
Co-Authors Akhmad Adi Sulianto, Akhmad Adi Fajri Anugroho, Fajri Fauzi, Rachmad Pratama Gustinasari, Kiki Lestari, Tri Fitria Indah Mustaqiman, Aulia Nur Prayogo, Wisnu Tia Dwi Irawandani