Watershed ecosystem will be stable when the relationship between the components of watershed are stable. Ecological and biophysical disturbances in watersheds are closely related to the disruption of its ecosystem components.The research was conducted to analyse the contribution of agroforestry system to the quality of watershed management, such as erosion, curve number (CN), and potential air retention. This study used qualitative method with steps survey, observation and interviewed the respondents who have the land and joint in the study site to obtain agroforestry practice data, vegetation components, and biophysic condition. Erosion prediction used the Universal Soil Loss Equation (USLE) equation, analyzis of the CN used an empirical equation to estimate surface run-off as a result of the rainfall, land cover changes, and soil hydrological groups (Cover complex classification). The value of a CN was based on the maps of soil types and land cover, the potential retention value (S), the value curve, and the rainfall factor (P). The results showed that the types of agroforestry affected the quality of watershed landscape management with indicators were erosion, curve numbers and potential air retention. Those indicators have a quantitative relationship with various types of agroforestry.
Oleh :
Nur Intan Mangunsong
