Stream corridors and floodplains provide naturally beneficial functions with regard to flooding, water quality, habitat, and channel stability.  When water is able to overflow its banks and spread out onto the floodplain, the water is slowed down and its energy is dissipated.

An illustrated stream processes guide has been developed to promote improved understanding of natural stream processes and the impacts of human intervention.  This award-winning booklet, Stream Processes:  A Guide to Living in Harmony With Streams, can be downloaded (large file) or hardcopies obtained by calling STC. 

Trees and other woody debris are an natural part of stream systems.  When a tree falls into a stream, it breaks up the flow, which can have the beneficial effect of dissipating energy and reducing erosion.  However, debris accumulation in stream channels and other drainageways can also contribute to flooding and drainage problems, particularly in developed areas.  It is recommended that streams, culverts, and other drainageways be inspected annually and after major storm events.  Man-made debris and other material that is likely to contribute to problems can be selectively removed from the channel.  Download an information sheet about developing a drainage system maintenance program.