Dynamics of dissolved silicium and nitrogen-nutrients at low temperature in the Ems-dollard estuary |
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| Affiliation: | 1. Institute of Environmental Sciences and Engineering (IESE), School of Civil and Environmental Engineering (SCEE), National University of Sciences and Technology (NUST), H-12 Campus, Islamabad 44000, Pakistan;2. School of Chemical & Materials Engineering (SCME), National University of Sciences and Technology (NUST), H-12 Campus, Islamabad 44000, Pakistan |
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| Abstract: | With salinity and natural fluorescence as conservative tracers to discriminate between fresh water contributions from two different fresh water sources (the river Ems and the river Westerwoldse Aa), deviations from conservative behaviour for silicate, ammonia and nitrate during winter conditions (4–6°C) are reported and discussed. For silicate a net removal from overlying water during transport through the estuary of 15% was found. Nitrification in overlying water (260 μmol·m−3·h−1) was the only important process in nitrogen cycling; sediment-water exchange was of no importance during this period. |
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