Seasonal differences in TrOC attenuation in the hyporheic zone of the Erpe side channel

We conducted two sampling campaigns following the same protocol, one in winter, one in summer 2019. - <strong>Surface water samples, pore water samples</strong> along a depth profile in the pore water from 2 - 20 cm sediment depth, every 2 cm > Sampling interval: 1 hour, for 7 (winter) and 11 (summer) hours > Parameters: 18 trace organics, sulfate, nitrate-N, dissolved Fe and Mn, oxygen - <strong>Continuous measurements</strong> > CTD-divers in surface water and different depths of the sediment: 4, 8, 12, 16, 20 cm, measuring pressure P, temperature T and electrical conductivity EC > a temperature lance, vertical in sediment, in summer, sensor depths: 0, 5, 20, 22, 25, 30, 60 cm > Pressure difference between surface water and in different sediment depths, measured with 2 devices: 0, 5, 7, 10, 15 cm and 0, 5, 10, 12, 15, 20 cm - <strong>Sediment data</strong>: sediment cores taken at sampling sites after each sampling campaign, split up in at least two depths which were analysed for: > saturated hydraulic conductivity (Ksat, normed to 10°C) > porosity, grain size distribution > total carbon content TC