Headwater Stream Restoration Goals and Practices
Lindsay Nicoll
McCormick Taylor
Baltimore, MD
Authors: Lindsay Nicoll and Josh Smalley
An increased interest in large scale nutrient reduction in large waterbodies such as the Chesapeake Bay has led to research into the areas of high stream erosion and transport. Research from Smith, Belmont and Wilcock, 2011 found that the majority of sediment eroded from first order streams is eventually transported through the stream network to the downstream reservoir or receiving body. Based on this an increased focus on restoration of eroded headwater systems where practices can effectively prevent down network transport of sediments and nutrients has emerged.
Stream restoration has traditionally used a range of restoration approaches to maximize project goals to specific site constrains. Further understanding of headwater channels and their relationship to the greater stream network provides opportunities for expansion of goals and practices appropriate for the restoration of headwater channels. Bringing this watershed based goal assessment to more traditional stream restoration projects suggests a broader view of the potential benefits associated with stream restoration when viewed in the mindset of functional uplift.
Recent experience with design and construction of headwater channels in the Mid-Atlantic region has provided insight into incorporating headwater channels into the broader context of watershed restoration. Examples of insights include (a) hydraulic analysis of steep channels, (b) incorporating infiltration and flow control practices, (c) balancing the use of wood and rock for stabilization, and (d) construction.
This presentation focuses on how headwater channel rehabilitation is incorporated into the broader goal of stream and watershed restoration and provides insight into the design and construction in eroded headwater systems.
About Lindsay Nicoll
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