Spatial Simulation of  The Organic Carbon Content and its Effects on the Erodibility and  Soil Erosion with  Universal Soil Loss Equation and Geographic Information Systems

Yagus Wijayanto

doi:10.5400/jts.2025.v30i1.%p

Spatial Simulation of The Organic Carbon Content and its Effects on the Erodibility and Soil Erosion with Universal Soil Loss Equation and Geographic Information Systems

Yagus Wijayanto

Abstract

The combined Universal Soil Loss Equation (USLE) and Geographical Information Systems are two models for spatial soil erosion analysis because the fact that each erosion factor has spatial context. As an important factor, the soil erodibility is crucial in determining soil erosion, with C-Organic significantly influencing the K value. The main aim of this study is to characterize soil erodibility and soil loss based on spatial simulation on the effects of Soil C-Organic in GIS environment. Research findings indicate that by simulating within GIS environment, C-Organic can affect both soil erodibility and erosion. Low C-Organic levels can increase soil erodibility, while high C-Organic levels can decrease it. A reduction in C-Organic by 10%, 20%, and 30% will increase K by 1.10%, 1.17%, and 1.21%, respectively. Conversely, adding 10%, 20%, and 30% C-Organic will decrease K by 1.12%, 1.27%, and 1.46%, respectively. A 10%, 20%, and 30% increase in C-Organic can reduce soil loss by 1.2%, 1.3%, and 1.5%, while a reduction in C-Organic will increase soil loss by 1.1%, 1.2%, and 1.3%, respectively. A low K value indicates slightly erosion, while a high K value suggests more severe erosion. Adding C-Organic and managing vegetation are necessary to maintain and improve soil quality.

Keywords

Soil Science

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DOI: http://dx.doi.org/10.5400/jts.2025.v30i1.%25p