The Effect of Different Layers Above Soil on the Amount of Soil Erosion

Abstract

Soil erosion, caused by wind or water, poses significant environmental and economic challenges, including the degradation of agricultural land, increased crop damage, and risks to infrastructure. This study investigates the effectiveness of different surface layers—dried leaves, mulch, and rocks—in reducing soil erosion under simulated rainfall. Its purpose was to find the most effective method for preventing soil loss and maintaining land stability in everyday farmlands and neighborhoods. The experiment utilized trays filled with soil, each covered with one of the materials or left bare as a control. Water was poured over the trays from a consistent height, and the amount of soil eroded was measured by the mass of soil lost. Throughout the study, the experimenter took precautionary measures to protect the skin and eyes from harmful particles. The results demonstrated that all protective layers reduced erosion compared to controlled bare soil. Rocks proved most effective, reducing erosion to an average of 1.8 grams, compared to 26.5 grams from the bare soil. Mulch and dried leaves provided minimal protection, with average erosion rates of 2.5 grams and 3 grams, respectively. The study supports the hypothesis that physical barriers, especially rocks, can significantly mitigate soil erosion by reducing the runoff velocity and maintaining soil structure. These findings suggest that using natural materials can be a practical strategy for controlling erosion in agricultural and urban environments. Future research could explore the long-term impact of these materials and their potential in combination with different soil types and environmental conditions.