Characteristics of Slope Runoff and Sediment and Vegetation of Pinus massoniana Forests under Different Management in Red Soil Regions of Southern China

Based on the observation of runoff plots, vegetation's contributions to the surface runoff were compared under different precipitations, the functional connectivity and the gray correlation method were explored for relevant soil and vegetation parameters. The results were as follows:(1) the flow and sediment reduction effect in different plots were understorey flow, closed management, pure forest, artificial arbor with mixed shrub and grass in ascending order; (2) vegetation characteristics above and below the ground had obvious impedance to slope hydrological process; (3) the relevant parameters influences were listed as soil moisture content, vegetation coverage, vegetation height, organic matter content in ascending order. It could be seen that the water and sediment processes were not consistent with changing precipitation in plots, and the vegetation played an important role in slope soil and water conservation in the plot scale.