ISSN:
1573-5117
Keywords:
lake restoration
;
hypolimnetic aeration
;
iron-phosphate precipitation
;
eutrophication
;
reoligotrophication
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Lake Krupunder is a small, glacial, stratified lake. Before restoration it was classified as eutrophic to polytrophic. Stepwise the lake was restored to a mesotrophic status: 1. In April 1990 a deep water aeration plant was installed. Although the entire hypolimnion was sufficiently supplied with oxygen the trophic level remained high because of substochiometric natural iron concentrations. 2. In September 1991 a technical iron-phosphate precipitation was carried out, dispensing 1.8 t of iron-chloride-sulfate (‘Ferri floc’) into the hypolimnion using the aerator. Until July 1992 the chlorophyll-a concentration decreased by 90%/77% (maximum/mean value).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00026732
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