Download Appendix _H_ Corridor Development

Development of Stream Corridor Buffers in Step 09
Steps used to Create the Stream Corridor from Component Buffers
The figures in this Appendix are provided for the purposes of documenting the process, data and
themes used in creating the stream corridor buffer in Step 09. The essential themes are as
follows:
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Sub-watershed delineation (polygons);
Valley wall delineation (polygons)
Meander centerline (polyline) and
Stream Centerline (polyline).
Note: Refer to Appendix E of the “Vermont Phase 1 Stream Geomorphic Assessment
Handbook” and “Floodway Determination Technical Guidance” for scientific concepts and
reasoning behind the development of the stream corridor.
The following figure illustrates the basic themes used in creating Stream Corridor Buffers:
Valley Walls
Meander
Centerline
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Surface Water
Centerline
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Ú
Ê
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Valley Line
(Step 07)
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Sub-watershed
Boundary
Note: The valley line developed in Step 07 is shown for illustrative purposes only. It is
not used in the process for creating stream corridors.
Creating a stream corridor involves a ten step process of creating individual buffers around a
specific feature (stream centerline, meander centerline or valley wall); clipping a previously
developed buffer to a specific feature and/or combining previously developed buffers to form a
composite buffer. The steps are briefly described and illustrated in the following.
SGAT – Version 3
VT Agency of Natural Resources
- H-20 -
Revision: December 10, 2003