Roots take up groundwater and surface run off via interception, causing more transpiration from plants
Rock type
Sedimentary rocks are more permeable than metamorphic or igneous rocks. Less permeable rocks means less percolation and more water in soils and run off
Antecedent Conditions
Previous rainfall means soils will be saturated and less water will infiltrate into soils, meaning more surface run off
Relief and Topgraphy
Steep slopes promote faster movement of water and shorter storage times
Permafrost
Frozen ground is impermeable, meaning more run off
Precipitation
Higher rainfall means more saturated soils and more run off
