The Effect of Reservoirs on Phosphorus Concentration

✍ Scribed by Milan Straškraba; Iva Dostálková; Josef Hejzlar; Vojtêch Vyhnálek

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 607 KB
• Volume: 80
• Category: Article
• ISSN: 1434-2944
• DOI: 10.1002/iroh.19950800304

✦ Synopsis

The annual average degree of phosphorus retention (both TP and O f ) in reservoirs was found to depend mainly on the theoretical retention time (RT). The phosphorus retention ( R P ) is shown for some reservoirs in Czech Republic to be well approximated (standard deviation = 10.9) with RP,Tp) = 74.7'* (l-exp(-0.0255* RT)) (N = 38, 7 I RT% 604 days).

The inclusion of 13 additional reservoirs for which data were assembled from literature resulted in RPtTP) = 76. I '* ( I-exp(-0.0282* R7)) (N = 5 1, range of RT nearly unchsnged). The retention of soluble reactive phosphorus RP,,,, studied on data from literature seems to be high-Statistical comparison with data for RP(T,, of lakes has shown a significantly lower retention in lakes RP,,,, = 66.0'$ (I-exp(-0.00419* RT)) (N = 59,5.8 I R T S 260000 days).

The differences between RP(op, and RP,T,, and differentiation of lakes and reservoirs are discussed and a need for more thorough theoretical analysis stressed. Consequences for watershed management are summarized.

an almost identical relationship: er than that of TP.