https://openprairie.sdstate.edu/oak-lake_presentations/1001/thumbnail.jp

Dailey, Jennifer A.

Troelstrup, Nels H., Jr.

English

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South Dakota State UniversityOpen PRAIRIE: Open Public Research Access InstitutionalRepository and Information ExchangeOak Lake Field Station 30th Anniversary Retreat Presentations2019Oak Lake Wetland Restoration: Difference inHydrology between Newly Restored andReference WetlandsJennifer A. DaileyNels H. Troelstrup Jr.Follow this and additional works at: https://openprairie.sdstate.edu/oak-lake_presentationsPart of the Biodiversity Commons, Natural Resources Management and Policy Commons, andthe Terrestrial and Aquatic Ecology CommonsOak Lake Wetland Restoration: Difference in Hydrology between Newly Restored and Reference WetlandsJennifer A. Dailey & Nels H. Troelstrup, Jr., Ph.D.Wetland Restoration• Wetlands have been decreasing since the 1780s – Upwards of 87% lost; rate of loss has slowed, but not stopped• Restoration programs started in the 1900s• State and federal agencies as well as non-profits work on wetland restoration projects– USFWS, UDSA, Ducks Unlimited• The goal is to return the wetland functions and services to levels consistent to a reference wetland in the regionLocation= Restored Wetland=  Reference WetlandWetland Hydrology Locations of the Wetlands• Reference Wetland • Restored WetlandReference RestoredBasin Length 92 M 133 MBasin Width 73 M 54 MAverage Depth 37 cm 32 cm• 1.74 kilometers apart• Very similar area and depth Objectives• Look at three main attributes for both reference and restored wetlands– Wetland Hydrology• Hydroperiod, dynamic responses (dry/wet periods)– Water Chemistry• Similar fluctuations & ranges– Invertebrate Assemblage Structure• Total abundance, composition, & number of speciesWetland Hydrology• Hydroperiod – Intermittent  – Most important factor when considering stability of a wetland– Period of time that the basin holds water• Dynamics – Dry or wet periods of a wetland– Storm Response   Methods• Measuring Hydroperiod and Dynamics– Hobo Data Loggers• Set a recording start date• Deploy in wetland• Retrieve & Replace• Download Data & Analyze it– Weekly Depth Measurements• 3 marked locations40485664728088961041125/8/18 0:00 5/18/18 0:00 5/28/18 0:00 6/7/18 0:00 6/17/18 0:00 6/27/18 0:00Temperature °CTimeRestored Wetland Wet/Dry PeriodsBegan DryingDry50454035302520151053845525966738087941016/24/18 0:00 7/9/18 0:00 7/24/18 0:00 8/8/18 0:00 8/23/18 0:00Temperature °CTimeReference Wetland Dry/Wet PeriodBegan DryingDry4338332823181383001020304050605/8/18 5/15/18 5/22/18 5/29/18 6/5/18 6/12/18 6/19/18 6/26/18 7/3/18 7/10/18 7/17/18 7/24/18 7/31/18Depth (cm)DateDepth over Time for Restored and Reference WetlandsControl Depth Restored DepthReferenc  DepthConclusion• Hydroperiod– Wet longer than 2017, but still doesn’t hold water as long as reference• Dynamic responses (dry/wet periods)– Similar in both wetlands; depth increase after rainfall events• Restored basin has wetland hydrology– Hydrology is there; looks more like reference every yearAcknowledgements• Oak Lake Field Station– Charles & Marcia McMullen • Department of Natural Resource Management • South Dakota Agriculture Experiment Station• Dr. Troelstrup• Kate Wollman and Ashlee Nilson

Oak Lake Wetland Restoration: Difference in Hydrology between Newly Restored and Reference Wetlands

https://openprairie.sdstate.edu/cgi/viewcontent.cgi?article=1001&amp;context=oak-lake_presentations

Oak Lake Wetland Restoration: Difference in Hydrology between Newly Restored and Reference Wetlands

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