Evaluation of the Success of Planting in the Rehabilitation of a Watershed Area in Sei Lesan Protected Forest, Indonesia

The high level of community activity in using river watershed land has resulted in the exploitation of land around the watershed which has resulted in a decline in soil quality and caused land degradation along the river flow, therefore areas along the river flow require land reclamation so that the natural balance around the watershed is maintained. Reclamation is an activity that aims to repair or organize the use of land that has been disturbed as a result of inappropriate environmental processing business activities so that it can function and be efficient according to its intended purpose. The research aim is to evaluate the level of success of planting in the rehabilitation process of PT Berau Coal in the Lesan River Protected Forest. The research was carried out in the Sei Lesan Protected Forest Area in the Segah Watershed, Kelay Sub Watershed in Kelay District, Berau Regency, East Kalimantan Province, Indonesia from July to August 2022. This research used systematic sampling with the random start method, namely plot measurement, The first measuring plot is created randomly and subsequent measuring plots are created systematically with a sampling intensity of at least 5%. The results of the research show that the level of plant growth in watershed rehabilitation activities at PT Berau Coal Watershed Rehabilitation was declared successful with a plant survival percentage value of 78.24%, and the planting results in the PT Berau Coal Block C watershed rehabilitation area were very good with a percentage of healthy plants of 76.08%.