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Title: College Brook Ecological Restoration

Stream chemistry reflects the physical, chemical, and biological conditions in a watershed. Because it is responsive to disturbance or restoration of biotic fimctions, stream chemistry provides an integrated description of a watershed's ecological conditions (IvIcDowell and Asbury 1994, McDowell et al. 1995). Stream chemistry in College Brook, which passes through the heart of the UNH campus, will be used as one measure of the success of an ecological restoration project to be iniiiated in 2000.

Previous work on College Brook in the early 1990's shows that the UNH campus had a severe impact on water quality and was negatively affecting stream biota and the intesity of downstream ecosystems; the restoration prograrn is an attempt to reverse this situation. The overall restoration effort is funded hy the privately endowed UNH Sustainability Program.

Matching funds provided by the UNH Sustainability Program will find a long-term restoration program in the College Brook watershed. As part of this project, the UNH U7RRC will take water quality sarnples monthly at 7 stations and analyze them for BOD, organic nutrients, and inorganic constituents. BOD will be analyzed using standard incubations and changes in dissolved oxygen using a membrane probe. Dissolved org,anic carbon C)OC) will be analyzed using high-temperature catalytic oxidaiion (Shirnadzu TOC 5000). Dissolved organic nitrogen (OON) will be measured as the difference between total dissolved N (using high temperature catalytic oxidation and cherniluminescent NO detection; Merriarn et al. 1996) and inorganic nitrogen. Plow injeciion analysis will be used to measure phosphate (molybdate blue method), aTnrnonium (phenol hypochlorite method) and silica (molybdate blue method). Major cations and anions wilI be analyzed using ion chromatography. Analyses urill be conducted in the WRRC's Water Quality Analysis Lab. Data will be posted on the WRRC web site to provide an ongoing public exarnination of ecological sustainability in the College Brook watershed.

One role of the WRRC in this project will be to administer the Water Quality Analysis Laboratory within which all chemical analyses will be conducted. A second role will be to provide a link between the technical analysis of water quality samples and assessment of the effechveness of the ecological restoration program This is an issue of interest to the University community and the public at large in southern New Hampshire.

U.S. Department of the Interior, U.S. Geological Survey
Maintained by: John Schefter
Last Updated: Tuesday November 1, 2005 5:03 PM
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