Wetland Boundary Determination in the Great Dismal Swamp Using Weighted Averages
Water Resources Bulletin
By: Virginia Carter, Mary Keith Garrett, and Patricia T. Gammon
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Abstract
A weighted average method was used to analyze transition zone vegetation in the Great Dismal Swamp to determine if a more uniform determination of wetland boundaries can be made nationwide. The method was applied to vegetation data collected on four transects and three vertical layers across the wetland-to-upland transition zone of the swamp. Ecological index values based on water tolerance were either taken from the literature or derived from local species tolerances. Wetland index values were calculated for 25-m increments using species cover and rankings based on the ecological indices. Wetland index values were used to designate increments as either wetland, transitional, or upland, and to examine the usefulness of a provisional wetland-upland break-point. The weighted average method did not provide for an objective placement of an absolute wetland boundary, but did serve to focus attention on the transitional boundary zone where supplementary information is necessary to select a wetland-upland breakpoint.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Wetland Boundary Determination in the Great Dismal Swamp Using Weighted Averages |
| Series title | Water Resources Bulletin |
| DOI | 10.1111/j.1752-1688.1988.tb02987.x |
| Volume | 24 |
| Issue | 2 |
| Year Published | 1988 |
| Language | English |
| Publisher | American Water Resources Association |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Water Resources Bulletin |
| First page | 297 |
| Last page | 306 |
| Google Analytic Metrics | Metrics page |