Understanding the changes of runoff，sediment transport，and hydrodynamic parameters
of slopes under the influence of landscape patch coverage and connectivity is of great significance for
revealing the hydrodynamic mechanism and hydrological connectivity of slope soil erosion process．
In this study，the changes of runoff，sediment transport and hydrodynamic parameters of downhill
surface in different coverage levels (0%，20%，40%，60%，90%) and different connectivity
modes (vertical path，horizonal path，S-shaped path，random patches) of shrublands were analyzed
by field artificial simulated rainfall test． The results showed that，with the increases of shrub cove-
rage，runoff yield and sediment yield decreased exponentially． When the coverage increased to more
than 60%，the capacity of shrubs to reduce runoff and sediment became stable． With the increases
of shrub coverage，flow velocity，flow depth，Ｒeynolds number，Froude number，stream power，
and flow shear resistance significantly decreased，while Manning’s roughness coefficient and Darcy-
Weisbach resistance coefficient increased significantly． When shrub coverage increased to more than
60%，there was no significant difference in the eigenvalues of hydraulic parameters． The runoff rate
under the four connectivity modes followed the order of vertical path ＞ S-shaped path ＞ horizonal
path ＞ random patches． The sediment rate was the largest in the vertical path，followed by the
S-shaped path，and the horizonal path was not significantly different from the random patches． Thepath with poor connectivity (horizonal path，random patches) exhibited stronger resistance of
hydraulic transmission and poor hydraulic sedimentation capacity than the well-connected path (ver-
tical path，S-shaped path)． Our results could provide important theoretical basis for soil erosion
control on the Loess Plateau and high-quality development of the Yellow Ｒiver basin．
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