Erosion Measurement by Using Rainfall Simulator at Grass Soil and after Harvested Soil in Wanagama

Erosion is a global problem, including in Wanagama. With the high risk of erosion, both naturally and due to high human activity, it is interesting and it is important to know how much erosion is in the Wanagama forest, especially in this study on kolonjono grasslands (Brachiaria mutica). The result of this study can be used as a base to avoid land degradation, while working together with the surrounding community needs to be maintained, which has recently become a trend in forest management in general to maintain the harmony of sustainable and sustainable forest management. However, the problem in measuring the erosion was faced when the rainfall happens rarely as a result of climate change. So, the development of erosion measurement tools is urgently required. The use of rainfall simulator was studied in order to find out that although during the dry season the erosion research can be carried out. The purpose of this study was to measure the erosion rate at the grass soil and after harvested soil, and to prove the use of rainfall simulator for measuring erosion. This study resulted that both the erosion and runoff have a positive correlation with the rainfall duration with the R square of 0.993 to 1. The erosion rate at the grass soil and at the post harvested soil were almost the same so there was no significant difference. However, the runoff at the grass soil was significantly different from the runoff at the post harvested soil.