Full Description

A two-year hypolimnetic aeration pilot program in New Croton Reservoir began in June 1998 with the installation of three aerators. The goal is to oxygenate some of the anoxic hypolimnetic water of the reservoir with a view to: determining how much of the suspected color-causing constituents could be removed from the raw water; determining if full-reservoir aeration would benefit the reservoir; and, providing information for sizing and placement of additional aerators for full reservoir aeration. A complex program of field measurement, sampling and laboratory analysis was undertaken to study the effects of the aerators. Results of the first year of study are: apparent color is an inappropriate measure for anoxic waters, which contain dissolved iron and manganese, because of precipitation of oxidized forms of these metals; the best independent variable to explain apparent color is sample turbidity; and, hypolimnetic aeration appears to have reduced total iron concentration and apparent color at one of the two sites for which historic data are available.

Product Details

Published: 01/01/1999 ISBN(s): 1583210016 Number of Pages: 14 File Size: 1 file , 1.4 MB