The Effect of Land Cover Changes on Surface Runoff Using the Model Soil and Water Assessment Tool in the Bila Watershed
Wahyuni- Andang Suryana Soma- Fadhlurrahman Salimin

Lecturer, Forestry Faculty, Universitas Hasanuddin
Lecturer, Forestry Faculty, Universitas Hasanuddin
Forestry Faculty, Universitas Hasanuddin
Email: wahyunipammu[at]gmail.com

Abstract

Changes in land cover have a negative impact on land and water resources that occur in the watershed area (DAS). Changes in vegetated land cover can cause an increase in surface runoff due to reduced land that can absorb water. This can lead to an increase in the volume of water flowing into rivers and lakes, which can eventually lead to flooding. This study aims to analyze changes in land cover in 2016 and 2021 and their effects on surface runoff in the Bila Watershed. Analysis of land cover change was carried out using the Geographic Information System approach, namely data overlay and in analyzing the effect of land cover change on surface runoff from the results of the Soil and Water Assessment Tool Model used descriptive analysis. The results of this study revealed that the land cover of the DAS when experiencing the highest change was in shrubs of 680.29 ha, dryland agriculture covering an area of 520.99 ha and secondary dryland forest covering an area of 155.76 ha, then the effect of changes in land cover on surface runoff varies. according to the type of change, the highest increase in surface runoff was with changes in shrub cover to agricultural land and open land while the lowest increase in surface runoff was with changes in primary dryland forest land cover to secondary dryland forest

Keywords: Land Cover Change- SWAT Model- Surface Runoff- Bila Watershed

Topic: Topik C: Ecological risk and natural disaster