Assessment of erosion hazard levels on various land cover types in Panjaratan sub watershed

Abstract

Direct land use causes land-use changes. Land deterioration from land use changes without evident damage prevention generates erosion, sedimentation, and low rainwater infiltration. Tanah Laut Regency has a lot of improper land conversion. This study calculated erosion based on land cover in the Panjaratan sub-watershed and analyzed the Level of Erosion Hazard (LEH). The Universal Soil Loss Equation (USLE) and purposive sampling are utilized. The results showed that the Panjaratan Sub-Watershed had 60.97 tons ha-1yr-1 of probable erosion, with an average of 6.77 tons ha-1yr-1. The highest erosion value was in Land Unit 3 in wood tuber farming with 14.47 tons ha ha-1yr-1 and erosion hazard class I. The lowest value was in Land Unit 4 in Jackfruit Plantations with 1.99 tons ha-1yr-1 and erosion hazard class I. LEH class 0- VM (very mild) is found in LU 1 Corn plantation, LU 2 reeds, LU 4 Jackfruit Plantation, LU 5 Shrubs, LU 6 Shrubs, dryland agriculture at LU 3, and Oil palm plantations at LU 7 and 8. On bare land, LEH class 1-M (mild) is LU 9.