Final Report: Performance Report Surveys and Investigations Projects as Requiredby Federal Aid in Wildlife Restorations Act, Missouri. Federal Aid Project No. W-13-5-54 (2000). Study No. 3: Effects of Effluent as Water Source for Managed Wetlands at Eagle

摘要

Beginning in the early 1990s, the 4,269 acre Eagle Bluffs Conservation Area(EBCA) was acquired by the Missouri Department of Conservation (MDC) from what had been intensively farmed lands in the Missouri River flood plain. Treated effluent from the City of Columbia (COC), Missouri and the Missouri River provide water sources for wetland management of approximately 1,300 acres of actual wetland habitat. The water supply for the COC is from several deep wells adjacent to the EBCA. The large scale use of treated effluent for managing wetlands near the source of city drinking water prompted interest in evaluating the potential long-term ecological impacts and environmental contributions of a 'restored natural wetland receiving treated effluent from a municipal waste water treatment system.' To evaluate the influence of management of the 13 EBCA wetland units, including the impact of the effluent from the COC wetland, baseline information about the soil resource on the EBCA was needed before inundation started. Concern had been expressed about the existing levels of organic pesticides and heavy metals in the soils as well as future accumulations from the combined river water and COC wetland effluent.