caa a22 4500 463208803 CHVBK 20180405153134.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1007/s10705-006-9057-3 doi (NATIONALLICENCE)springer-10.1007/s10705-006-9057-3 Phosphorus and sediment transfers in a grassland river catchment [Elektronische Daten] [Richard Douglas, Wayne Menary, Philip Jordan] The Oona Water (102km2) is a tributary of the Blackwater River (1,480km2), an Irish cross border catchment and the largest of the six influent rivers to Lough Neagh. An intensive investigation into the magnitude of phosphorus and sediment transfers from field (0.15km2), farm (0.62km2) and landscape (84.50km2) scale sub-catchments showed that total phosphorus transfers were 1.73, 1.82 and 2.50kg/ha, respectively, during the 2001-2002 hydrological year. Two important features of these data were noted. Firstly, higher transfers from the landscape scale sub-catchment were related to phosphorus inputs between storm events. These were mainly in the soluble form and maintained the river in a hypertrophic state during low flow despite there being no major point source discharges in the catchment. A mass P balance estimate of all domestic wastewater effluents indicated that this is a minor source but may have major impacts at extreme low flows. Secondly, despite the Oona Water being a grassland catchment the main phosphorus fraction recorded was in the particulate form (>50%) and strongly correlated with suspended sediments (SSs), manganese and iron during both storm and non-storm periods. Previous Irish studies have indicated that the main edge-of-field phosphorus transfers from grassland soils are in the soluble form. While erosive overland flow cannot be ruled out from soils of low permeability in the Oona Water, it is also likely that soluble P is entrained to equilibrium by manganese and iron rich SSs from multiple sources that will include stream bank and bed sediments. Springer Science+Business Media B.V., 2006 Phosphorus nationallicence Suspended sediments nationallicence Manganese nationallicence Iron nationallicence Catchments nationallicence Douglas Richard Environmental Sciences Research Unit, School of Environmental Sciences, University of Ulster, Cromore Road, BT52 1SA, Coleraine, UK aut Menary Wayne Environmental Sciences Research Unit, School of Environmental Sciences, University of Ulster, Cromore Road, BT52 1SA, Coleraine, UK aut Jordan Philip Environmental Sciences Research Unit, School of Environmental Sciences, University of Ulster, Cromore Road, BT52 1SA, Coleraine, UK aut Nutrient Cycling in Agroecosystems Kluwer Academic Publishers 77/3(2007-03-01), 199-212 1385-1314 77:3<199 2007 77 10705 https://doi.org/10.1007/s10705-006-9057-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10705-006-9057-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Douglas Richard Environmental Sciences Research Unit, School of Environmental Sciences, University of Ulster, Cromore Road, BT52 1SA, Coleraine, UK aut NATIONALLICENCE 700 1- Menary Wayne Environmental Sciences Research Unit, School of Environmental Sciences, University of Ulster, Cromore Road, BT52 1SA, Coleraine, UK aut NATIONALLICENCE 700 1- Jordan Philip Environmental Sciences Research Unit, School of Environmental Sciences, University of Ulster, Cromore Road, BT52 1SA, Coleraine, UK aut NATIONALLICENCE 773 0- Nutrient Cycling in Agroecosystems Kluwer Academic Publishers 77/3(2007-03-01), 199-212 1385-1314 77:3<199 2007 77 10705 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer