NDLI: Floodplain hydrology after restoration of a Southern Appalachian mountain stream

Content Provider	Springer Nature Link
Author	Moorhead, Kevin K. Bell, David W. Thorn, Rachael N.
Copyright Year	2008
Abstract	Determining the success of restored wetland hydrology is often accomplished by documenting changes in wetland hydroperiod before and after restoration. Ideally, post-restoration hydropatterns would approach those that existed before site degradation. We evaluated the average monthly water-table levels of a mountain floodplain and fen wetland complex before and after restoration with manual wells that included seven or eight years of pre-restoration data and with electronic wells that included one or two years of pre-restoration data. Site restoration included reconstruction of a meandering 1.9 km stream channel to replace a previously straightened channel. A higher water table was noted within 50 m of the restored channel regardless of the length of pre-restoration assessment. Many of the manual wells further from the stream had insignificant changes in average monthly water levels, whereas higher water levels were common for the electronic wells regardless of proximity to the restored channel. The longer prerestoration assessment period for the manual wells captured the climatic averages of rainfall and provided a more accurate description of pre-restoration conditions. The electronic wells provided the appropriate data to determine if a given area met the compliance aspects of wetland restoration, but a thorough assessment of hydrologic changes could not be accomplished with the electronic well data because of the lower annual rainfall during the shorter pre-restoration assessment. We recommend that pre- and post-restoration assessment periods account for rainfall variability when documenting changes in hydrology associated with wetland restoration in fluvial systems. If no control wetland or water-table data are available, periods of nearly-average rainfall are helpful for evaluating wetland hydroperiod before and after restoration.
Starting Page	632
Ending Page	639
Page Count	8
File Format	PDF
ISSN	02775212
Journal	Wetlands
Volume Number	28
Issue Number	3
e-ISSN	19436246
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-01-01
Publisher Institution	Society of Wetland Scientists
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	assessment periods fen hydroperiod water table wetland restoration Freshwater & Marine Ecology Environmental Management Ecology Hydrogeology Coastal Sciences Landscape Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology Environmental Chemistry

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