The Geomorphic Significance of Log Steps in Forest Streams1

摘要: Abstract A functional account of log steps in forest streams is provided by field surveys 163 kilometers the central Oregon Coast Range. Natural treefall, rather than silvicultural activities, accounts for majority steps. During low-flow conditions, dissipation potential stream energy amounts to 6 percent, approximately equal that falls. There are no statistically significant differences regarding spatial distribution between study basins with contrasting and natural inputs large woody debris. However, revealed various orders, a finding points channel flushing capacity stream-adjacent topography as dominant controls on step development. Application thermodynamic principles systems demonstrates neither falls nor cause difference equilibrium conditions networks. The volume sediment...