Wetland Hydrology

Schiff, S., R. Aravena, E. Mewhinney, R. Elgood, B. Warner, P. Dillon, and S. Trumbore. 1998. Precambrian Shield wetlands Hydrologic control of the sources and export of dissolved organic carbon. Climatic Change 40 167—188. 

Many physical, chemical, and biological factors of soil influence the production and emission of nitrous oxide and methane. Wetland hydrology and hydroperiod determine whether soil aerobic or anaerobic conditions exist. Redox status is a quantifiable measurement of the reduction process occurring in wetlands. It is well known that nitrous oxide is mainly produced through denitrification and nitrification at moderately reducing conditions, but methanogenesis occurs only under strictly anaerobic conditions. 

Sensitive sites would include sites that are receiving high inputs of atmospheric Hg deposition and sites with aquatic ecosystems where top end predators have high levels of Hg. We also recommend that urban sites with elevated atmospheric Hg deposition and forest sites with shallow hydrologic flowpaths, wetlands, and unproductive aquatic ecosystems should strongly be considered as candidate sites. 

Waldron MC, Cohnan JA, and BreaultRF. 2000. Distribution, hydrologic transport, and cycling of total mercury and methyl mercury in a contaminated river-reservoir-wetland system (Sudbury River, eastern Massachusetts), Can J Fish Aquat Sci 57 1080-1091. 

Vepraskas MJ, Faulkner SP. Redox chemistry of hydric soils. In Richardson JL, Ve-praskas MJ, editors. Wetland Soils Genesis, Hydrology, Landscapes, and Classification. Boca Raton CRC Press, Taylor Francis Group 2001. pp. 85-105. 

Wetlands are intermediate between upland systems and true aquatic systems, both in terms of their hydrologies, being intermittently to permanently flooded, and in terms of their biogeochemistries, being sources, sinks and transformers of... 

Baker CJ, Maltby E. 1995. Nitrate removal by river marginal wetlands factors affecting the provision of a suitable denitrification environment. In Hughes JMR, Heath-waite AL, eds. Hydrology and Hydrochemistry of British Wetlands. Chichester Wiley, 291-313. 

Chambers, R.M., Osgood, D.T., Bart, D.J., and Montalto, F. (2003) Phragmites australis invasion and expansion in tidal wetlands interactions among salinity, sulfide, and hydrology. Estuaries 26, 398 -06. 

Gosselink, J.G, and Turner, R.E. (1978) The role of hydrology in freshwater wetland ecosystems. In Freshwater Wetlands Ecological Processes and Management Potential (Good, R.E., Whigham, D.F., and Simpson, R.L., eds.), pp. 63-78, Academic Press, New York. 

Girts, M. A. and R. L. P. Kleinmann. 1986. Constructed Wetlands for Treatment of Acid Mine Drainage A Preliminary Review. National Symposium on Mining, Hydrology, Sedimentol-ogy, and Reclamation, University of Kentucky, Lexington, KY. 

Gilman K. (1994) Hydrology and Wetland Conservation. Wiley, New York. 

LaBaugh J. W. (1988) Relation of hydrologic setting to chemical characteristics of selected lakes and wetlands within a climate gradient in the North-Central United States. Verh. Int. Ver. limnol. 23, 131 — 137. 

Human activity has substantially increased the hydrologic import of oxidized nitrogen and sulfur into wetland ecosystems. Emissions of sulfur are expected to double over the next 50 years (Rodhe,... 

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