The distribution of phosphorus in the weser river estuary

摘要

The spatial and temporal variations of various phosphorus compounds in the Weser River estuary have been investigated in intertidal sediments and along a 40 km waterway profile covering the whole salinity range. The total amount of P/l in the riverine water decreased from about 750 #x3BC;g at the river mouth to about 200 ug in the outer estuary. The good nonlinear negative correlation for diss. inorg. and organic bound P and the river run#x2010;off enable to calculate annual P discharges. P in the suspended particular matter showed nonlinear decrease with increasing salinity caused by the release of P#x2010;rich particles (apatite, Fe#x2010;phosphate) in the low salinity region.