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Titolo:
NUTRIENT DYNAMICS IN RIVERBEDS - THE IMPACT OF SEWAGE EFFLUENT AND AQUATIC MACROPHYTES
Autore:
CHAMBERS PA; PREPAS EE;
Indirizzi:
NATL HYDROL RES INST,11 INNOVAT BLVD SASKATOON S7N 3H5 SK CANADA UNIV ALBERTA,DEPT ZOOL EDMONTON T6G 2E9 AB CANADA UNIV ALBERTA,MEANOOK BIOL STN EDMONTON T6G 2E9 AB CANADA
Titolo Testata:
Water research
fascicolo: 2, volume: 28, anno: 1994,
pagine: 453 - 464
SICI:
0043-1354(1994)28:2<453:NDIR-T>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
FRESH-WATER MACROPHYTES; MYRIOPHYLLUM-SPICATUM; INTERSTITIAL WATER; PHOSPHORUS; SEDIMENT; STREAM; RELEASE; ENVIRONMENT; PHOSPHATE; NITROGEN;
Keywords:
RIVERS; SEDIMENTS; NUTRIENTS; AQUATIC MACROPHYTES; PHOSPHORUS; NITROGEN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
55
Recensione:
Indirizzi per estratti:
Citazione:
P.A. Chambers e E.E. Prepas, "NUTRIENT DYNAMICS IN RIVERBEDS - THE IMPACT OF SEWAGE EFFLUENT AND AQUATIC MACROPHYTES", Water research, 28(2), 1994, pp. 453-464

Abstract

To determine the impact of nutrient loading from a sewage treatment plant and from aquatic macrophytes on riverbed chemistry, a 6-month (May-November) study was undertaken in the South Saskatchewan River, Saskatchewan, Canada at five sites located upstream and downstream of a municipal sewage treatment plant outfall and with differing biomasses ofaquatic macrophytes. Nitrogen and phosphorus concentrations in the sediment-bound and porewater pools of the riverbed were greatest and porewater dissolved oxygen concentrations were lowest at the site with highest open-water nutrient concentrations (118 and 553 mu g/l TP and TDN) and aquatic macrophyte biomass (205 g/m(2)). Sites receiving littleor no sewage effluent (23-60 mu g/l TP and 221-325 mu g/l TDN) had the lowest porewater and sediment-bound nutrient concentrations if no macrophytes were present, whereas concentrations were one-third to seven-fold greater if macrophytes were present in moderate abundance (135 g/m(2)). Our results showed that effluent loading and aquatic macrophytes may cause significant changes in the chemistry of riverbed sediments and suggest that for shallow slow-flowing rivers, benthic nutrient exchanges represent a critical component in water quality modeling.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/09/20 alle ore 09:29:28