World Library  

Add to Book Shelf
Flag as Inappropriate
Email this Book

Can Ph and Electrical Conductivity Monitoring Reveal Spatial and Temporal Patterns in Wetland Geochemical Processes? : Volume 10, Issue 1 (16/01/2013)

By Gerla, P. J.

Click here to view

Book Id: WPLBN0004011799
Format Type: PDF Article :
File Size: Pages 30
Reproduction Date: 2015

Title: Can Ph and Electrical Conductivity Monitoring Reveal Spatial and Temporal Patterns in Wetland Geochemical Processes? : Volume 10, Issue 1 (16/01/2013)  
Author: Gerla, P. J.
Volume: Vol. 10, Issue 1
Language: English
Subject: Science, Hydrology, Earth
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: copernicus


APA MLA Chicago

Gerla, P. J. (2013). Can Ph and Electrical Conductivity Monitoring Reveal Spatial and Temporal Patterns in Wetland Geochemical Processes? : Volume 10, Issue 1 (16/01/2013). Retrieved from

Description: The Nature Conservancy – Minnesota, North Dakota, and South Dakota Chapter, 81 Cornell Street Stop 8358, Grand Forks, North Dakota 58202-8358, USA. Carbonate reactions and equilibria play a dominant role in the biogeochemical function of many wetlands. The US Geological Survey PHREEQC computer code was used to model geochemical reactions that may be typical for wetlands with water budgets characterized by: (a) input dominated by direct precipitation, (b) interaction with groundwater, (c) variable degrees of reaction with organic carbon, and (d) different rates of evapotranspiration. Rainfall with a typical composition was progressively reacted with calcite and organic carbon at various rates and proportions using PHREEQC. Contrasting patterns of the results suggest that basic water quality data collected in the field can reveal differences in the geochemical processes in wetlands. Given a temporal record, these can signal subtle changes in surrounding land cover and use. To demonstrate this, temperature, pH, and electrical conductivity (EC) were monitored for three years in five large wetlands comprising 48 sample sites in northwest Minnesota. EC and pH of samples ranged greatly – from 23 to 1300 ΜS cm−1 and 5.5 to 9. The largest range in pH was observed in small beach ridge wetlands, where two clusters are apparent: (1) low EC and a wide range of pH and (2) higher pH and EC. Large marshes within a glacial lake – till plain have a broad range of pH and EC, but depend on the specific wetland. Outlying data typically occurred in altered or disturbed areas. The inter-annual and intra-wetland consistency of the results suggests that each wetland system hosts characteristic geochemical conditions.

Can pH and electrical conductivity monitoring reveal spatial and temporal patterns in wetland geochemical processes?

Dillon, P. and Merritt, N.: Hydrochemical modeling of water quality in a ground and surface water system within a semi-urban watershed, in: Proceedings of the 2005 Watershed Management Conference – Managing Watersheds for Human and Natural Impacts: Engineering, Ecological, and Economic Challenges, Williamsburg, Virginia, USA, p. 1865, 2005.; Drexler, J. Z., Bedford, B. L., DeGaetano, A. T., and Siegel, D. I.: Quantification of the water budget and nutrient loading in a small peatland, J. Am. Water Resour. Assoc., 35, 753–769, 1999.; Faulkner, S. P., Patrick Jr., W. H., and Gambrell, R. P.: Field techniques for measuring wetland soil parameters, Soil Sci. Soc. Am. J., 53, 883–890, 1989.; Ponnamperuma, F. N.: The chemistry of submerged soils, Adv. Agron., 24, 29–96, 1972.; Almendinger, J. E. and Leete, J. H.: Regional and local hydrogeology of calcareous fens in the Minnesota River basin, USA, Wetlands, 18, 184–202, 1998.; Bragg, O. M. and Tallis, J. H.: The sensitivity of peat-covered upland landscapes, Catena, 42, 345–360, 2001.; Burkett, V. and Kusler, J.: Climate change: Potential impacts and interactions in wetlands of the United States, J. Am. Water Resour. As., 36, 313–320, 2000.; Davis, J. A. and Froend, R.: Loss and degradation of wetlands in southwestern Australia: Underlying causes, consequences and solutions, Wetl. Ecol. Manag., 7, 13–23, 1999.; Erwin, K. L.: Wetlands and global climate change: the role of wetland restoration in a changing world, Wetlands Ecol. Manage., 17, 71–84, 2009.; Fiedler, S., Vepraskas, M. J., and Richardson, J. L.: Soil redox potential: importance, field measurements, and observations, Adv. Agron., 94, 1–54, 2007.; Frei, S., Knorr, K. H., Peiffer, S., and Fleckenstein, J. H.: Surface micro-topography causes hot spots of biogeochemical activity in wetland systems: a virtual modeling experiment, J. Geophys. Res.-Biogeo., 117, G00N12, doi:10.1029/2012JG002012, 2012.; Gleason, R. A., Euliss Jr., N. H., Hubbard, D. E., and Duffy, W. G.: Effects of sediment load on emergence of aquatic invertebrates and plants from wetland soil egg and seed banks, Wetlands, 23, 26–34, 2003.; Gorham, E., Dean, W. E., and Sanger, J. E.: The chemical composition of lakes in the north-central United States, Limnol. Oceanogr., 28, 287–301, 1983.; Grootjans, A. P., Adema, E. B., Bleuten, W., Joosten, H., Madaras, M., and Janáková, M.: Hydrological landscape settings of base-rich fen mires and fen meadows: an overview, Appl. Veg. Sci., 9, 175–184, 2006.; Harris, K. L., Moran, S. R., and Clayton, L.: Late Quaternary Stratigraphic Nomenclature, Red River Valley, North Dakota and Minnesota, North Dakota Geol. Surv., Miscellaneous Series 52, 47 pp., 1974.; Hem, J. D.: Study and interpretation of the chemical characteristics of natural water, US Geological Survey Water-Supply Paper 2254, 263 pp., 1985.; Houlahan, J. E. and Findlay, C. S.: The effects of adjacent land use on wetland amphibian species richness and community composition, Can. J. Fish. Aquat. Sci., 60, 1078–1094, 2003.; International Water Institute: available at:, last access: 31 December 2012.; IUPAC: Compendium


Click To View

Additional Books

  • Satellite-based Analysis of Recent Trend... (by )
  • Data Compression to Define Information C... (by )
  • Establishing the Dominant Source of Unce... (by )
  • Uncertainty in the Impacts of Projected ... (by )
  • Ensemble Kalman Filter Versus Ensemble S... (by )
  • Monitoring of Riparian Vegetation Respon... (by )
  • From Maps to Movies: High-resolution Tim... (by )
  • Validation of the Operational Msg-seviri... (by )
  • Modelling of Snow Processes in Catchment... (by )
  • High Resolution Rainfall – Runoff Measur... (by )
  • The Water Quality of Streams Draining a ... (by )
  • Modelling the Effects of Acid Deposition... (by )
Scroll Left
Scroll Right


Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.