A tree planting survey in the marl watershed basins considering subsurface waters

Existing coarse materials produced during surface erosion in the marl watershed basinsin tributary beds and impermeable subsurface layers (marl layers) lead to produce asubsurface flow. This subsurface flow can be used in order to develop vegetation coverin order to make the biological stabilization of tributary beds. This method is veryuseful in the watersheds basins in which were performed the watershed practices suchas Gabion dams and sediment ponds. This paper was the result of the research plan,which was considered as development of vegetation cover to biologically stabilize thetributary beds in Sardehat village areas as a split plot factorial statistical design. Thethree kinds of trees including: Almond, Elaeagnus, and Acacia as the main treatments,and the mixed of soil with manure and clay, and natural soil as the sub-treatments inthree replications were studied in the selected area. During the performance of this studyvariables like stump diameter, height growth, and canopy cover were measured. Finalresults showed that considering the planting pattern Almond, Acacia and Elaegnus, andwithout considering the planting pattern Elaeagnus, Acacia, and Almond were preferredrespectively in order to stabilize biologically the marl tributary beds.