Phosphorus Transport in a Lowland Stream Derived from a Tracer Test with 32P

Small streams in urbanized rural areas receive loads of P from various, often episodic, sources. This paper addresses, through a tracer test with 32P, retention and transport pulse input phosphorus 2.6 km long stretch channelized second-order lowland stream. Tritiated water was introduced alongside the 32P-labelled ortophosphate order to isolate influence hydrodynamic factors on behavior. Tracer concentrations unfiltered samples were measured by liquid scintillation counting. Four in-stream five hyporheic breakthrough curves collected at four points along stream, two which encompass beaver dam impoundment. The overall efficiency 32P studied reach 46%. transient storage model OTIS-P provided reasonable fits for (BTCs) but failed reproducing BTCs. small effect solute higher more pronounced surface storage. Transient not enhanced