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United States Department of Agriculture

Agricultural Research Service

Title: Continuous Assessment of Nutrient Removal and Physicochemical Conditions Inconstructed Wetlands at a Distant Site

item Johnson, Melvin
item Stone, Kenneth
item Hunt, Patrick
item Matheny, Terry
item Szogi, Ariel - WA STATE UNIV, YAKIMA, WA
item Reddy, G - NCA&T, GREENSBORO, NC

Submitted to: International Symposium on Biogeochemistry of Trace Elements Proceedings
Publication Type: Abstract Only
Publication Acceptance Date: July 12, 1999
Publication Date: N/A

Technical Abstract: Measurement of constructed wetland performance and conditions can be difficult at a distant site. Our Center is located in Florence, SC, and we wished to investigate constructed wetlands located at the North Carolina A&T University swine facility in Greensboro, NC. The wetlands consist of six marsh-pond-marsh systems. The marsh areas have a mixture of cattail and bullrush plant communities. The monitoring requirements were 24-hour monitoring capability, a multitude of measurement channels, logging capability, and remote data retrieval for four of the six wetland systems. Water quality parameters were measured at the center of each marsh and pond area. These parameters include pH, ORP, and temperature of the water and ORP of the soil at two depths. Inflow, outflow, and water level of each wetland system were measured. In addition, rainfall and air temperature was measured. Weekly composite water samples for nutrient analysis were collected at the inlet and outlet of each wetland system using automated samplers and a unique switching device. System components included a datalogger, modem, switch-closure module, multiplexers, pH sensors, ORP sensors, temperature sensors, platinum electrodes, pressure transducers, solar panel, a rain gauge, and automated samplers.

Last Modified: 3/1/2015
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