Nutrient Exports from Two Agriculture-Dominated Watersheds in Southern Sweden
作者： Barbro Ulén
DOI: 10.2166/NH.1998.0003
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摘要: Nutrient concentrations and exports were monitored for eight years in two agriculture-dominated watersheds the central part of Vastgota Plain Sweden. The hydrology nutrient streams very similar. Concentrations (monthly flow-weighted) dissolved phosphate-phosphorus (PO4P) varied substantially during year (from 0.03 to 0.27 mg 1−1) whereas particulate phosphorus (PartP) less 0.16 −1). No trends export found after flow-normalization data. Three wet periods dominated long-term loads streams. Although a few events annual yields suspended solids (SS) from drainage pipes, standard deviation mean SS concentration was reasonably constant between different years. However, when further developing load models variation should probably be considered. In-stream processes may contribute nearly as much those occurring on arable soils terms their impact magnitude export. Total nitrogen (TotN) 5 1−1 similar pipes
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