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All Journal Applied Environmental Sustainability And Technology (AEST)
Afrilia Nur Fajriyah
Universitas Islam Negeri Profesor Kiai Haji Saifuddin Zuhri Purwokerto

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Integrating USLE and GIS Techniques For Soil Erosion Hazard Mapping In Ijo Watershed Afrilia Nur Fajriyah; Gangsar Edi Laksono; Eko Ahmad Riyanto; Arianti Mutia Ningrum; Fajar Firmansyah
Applied Environmental Sustainability and Technology Vol. 1 No. 1 (2025): Applied Environmental Sustainability and Technology
Publisher : Prodi Ilmu Lingkungan Fakultas Sains dan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24090/aest.v1i1.15399

Abstract

Soil erosion is a critical form of land degradation, particularly in tropical watersheds characterized by high rainfall intensity and steep topography. This study aims to assess erosion hazard levels in the Ijo Watershed, Central Java, Indonesia, by integrating the Universal Soil Loss Equation (USLE) with Geographic Information System (GIS) techniques. Five USLE factors—rainfall erosivity (R), soil erodibility (K), slope length and steepness (LS), land cover (C), and conservation practice (P)—were analyzed using multi-source data including rainfall records, soil maps, Digital Elevation Model (DEM), land cover maps, and field surveys. Results show that erosion hazard ranges from very low to very high, with the largest proportion in the very low category (35.09%) and the smallest in the very high category (8.74%). Areas with steep slopes and minimal conservation practices were identified as priority zones for intervention. The novelty of this study lies in applying the USLE–GIS approach to a small tropical watershed, which remains understudied despite its ecological and socio-economic importance. The findings not only fill knowledge gaps on erosion dynamics in small-scale watersheds but also provide scientific evidence for spatially explicit land management and conservation strategies. This contributes directly to Sustainable Development Goals (SDG 15) and Indonesia’s Land Degradation Neutrality (LDN) targets.
Monitoring The Water Quality Of The Klawing River In Purbalingga Regency Using The Pollution Index And Storet Methods Afrilia Nur Fajriyah; Arini Inayatul Wafiroh; Arif Nur Surdianto; Aulia Firda Alfiana
Applied Environmental Sustainability and Technology Vol. 2 No. 1 (2026): Applied Environmental Sustainability and Technology
Publisher : Prodi Ilmu Lingkungan Fakultas Sains dan Teknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24090/73705f36

Abstract

Monitoring river water quality is important because increasing anthropogenic activities can degrade aquatic environments. However, studies combining water quality parameter analysis with two assessment methods, namely the Pollution Index (PI) and Storet, remain limited, especially in the Klawing River, Purbalingga Regency. This study aims to analyze the water quality of the Klawing River using physical and chemical parameters and to determine its status using the Pollution Index and Storet methods. This study used a descriptive quantitative approach. Sampling was conducted at three locations representing the upstream, residential, and downstream areas. The observed parameters included temperature, Total Dissolved Solids (TDS), pH, Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD), and Chemical Oxygen Demand (COD). The data were compared with water quality standards outlined in Government Regulation No. 22 of 2021 and analyzed using the Pollution Index and Storet methods. The results show that physical parameters still meet the quality standards. However, chemical parameters indicate water quality degradation, particularly low DO levels of 1.15-1.7 mg/L and high COD levels of 36.4-60.2 mg/L. The Pollution Index method classified the river as lightly polluted, while the Storet method classified it as moderately polluted. Therefore, integrated pollution control is needed to maintain the sustainability of the Klawing River.
Co-Authors Arianti Mutia Ningrum Arif Nur Surdianto Arini Inayatul Wafiroh Aulia Firda Alfiana Eko Ahmad Riyanto Fajar Firmansyah Gangsar Edi Laksono