EFFECTS OF HYPOLIMNETIC WATER AERATION AND IRON-PHOSPHATE PRECIPITATION ON THE TROPHIC LEVEL OF LAKE KRUPUNDER

被引：23

作者：

JAEGER, D

机构：

[1] Fachbereich Bio-Ingenieurwesen, Produktionstechnik und Verfahrenstechnik, Fachhochschule Hamburg, Hamburg, D-21033

来源：

HYDROBIOLOGIA | 1994年 / 275卷

关键词：

LAKE RESTORATION; HYPOLIMNETIC AERATION; IRON-PHOSPHATE PRECIPITATION; EUTROPHICATION; REOLIGOTROPHICATION;

D O I：

10.1007/BF00026732

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

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).

引用

页码：433 / 444

页数：12

共 26 条

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