Abstract
Lake Bysjön is a hypertrophic seepage lake, with groundwater as a main external source of phosphorus. Twelve groundwater samples from the vicinity of the lake were high in phosphate (0.4 to 11 mg 1−1, mean value 2.57 mg 1−1 PO4-P), both within the riparian zone and in two shallow wells located upstreams the lake in the nearby village. Phosphorus sorption capacity of four sand samples measured with the Langmuir isotherm method was low (7.3 to 121.1 mg kg−1 PO4-P), with the lowest values found within the riparian zone. It is suggested that the phosphorus originates from garden fertilizers and other human sources, and that the low absorption capacity of the soils is caused by the leaching of calcium from the watershed, a process which started some 3000 years ago. Riparian zone itself has almost no retention capacity, and processes within it (e.g., redox-related) have only secondary importance for the transport of phosphorus to the lake.
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© 1993 Springer Science+Business Media Dordrecht
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Vanek, V. (1993). Transport of groundwater-borne phosphorus to Lake Bysjön, South Sweden. In: Hillbricht-Ilkowska, A., Pieczyńska, E. (eds) Nutrient Dynamics and Retention in Land/Water Ecotones of Lowland, Temperate Lakes and Rivers. Developments in Hydrobiology, vol 82. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1602-2_23
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DOI: https://doi.org/10.1007/978-94-011-1602-2_23
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