Elimination of Nutrients in the Rozkoš-Reservoir

✍ Scribed by Maixner, J. ;Sládeček, V.

• Book ID: 102690858
• Publisher: John Wiley and Sons
• Year: 1983
• Tongue: English
• Weight: 505 KB
• Volume: 11
• Category: Article
• ISSN: 0323-4320
• DOI: 10.1002/aheh.19830110608

✦ Synopsis

The reservoir, having a volume of 76 hm3, a surface area of 1001 ha and a maximum depth of 17 m, is divided by a dam into two parts. Half of the upper part with an area of 200 ha is densely covered by macrophytes (Elodea, Polamogeton). The three main tributaries with 2.6 m3/s on an average are highly polluted and show a-mesosaprobic conditions. The reservoir is investigated between September and March in its longitudinal section a t eight stations. The organic load and the total solids show a total decrease by and 660,;, respectively, and 70% of this selfpurification occurs in the upper, separated part of the reservoir. I n the same way, also the total nitrogen is reduced, whereas the total phosphorus is reduced already in the upper part of the reservoir by 71 0 6 , then decreasing t o 21 O/o in the second part of the reservoir. With phosphorus, besides the biological elimination obviously also precipitation by the dissolved iron occurs, the concentration of which is reduced by 44 or 760/,,, resp. The bacteriological load of water improved by two to three orders of magnitude.