![]() ![]() The sediment redeposition thickness reaches up to 9 mm directly next to the dredging tracks and 0.07 mm in about 320 m away from the dredging center. Due to a strong southward current during the dredging, the model predicts no sediment deposition and plume dispersion north of the dredging tracks. ![]() Results show that the model is capable of reproducing suspended sediment concentration and redeposition patterns observed during the dredge experiment. Various aspects including sediment characteristics and ocean hydrodynamics were examined to obtain the best statistical agreement between sensor-based observations and model results. The dispersion of a sediment plume induced by a small-scale dredge experiment in April 2019 was investigated numerically by employing a sediment transport module coupled to a high-resolution hydrodynamic regional ocean model. Here we report on a plume dispersion experiment carried out in the German license area for the exploration of polymetallic nodules in the northeastern tropical Pacific Ocean in 4,200 m water depth. Predictability of the dispersion of sediment plumes induced by potential deep-sea mining activities is still very limited due to operational limitations on in-situ observations required for a thorough validation and calibration of numerical models. 6Royal Belgian Institute of Natural Sciences, Brussels, Belgium.5Federal Institute for Geosciences and Natural Resources (BGR), Hannover, Germany.4NIOZ Royal Netherlands Institute for Sea Research, Department of Ocean Systems, Texel, Netherlands.3GEOMAR Helmholtz Center for Ocean Research Kiel, Kiel, Germany.2Department of Physics and Earth Science, Jacobs University Bremen, Bremen, Germany.1MARUM Center for Marine Environmental Sciences and Faculty of Geosciences, University of Bremen, Bremen, Germany.Kaveh Purkiani 1 * Benjamin Gillard 2 André Paul 1 Matthias Haeckel 3 Sabine Haalboom 4 Jens Greinert 3 Henko de Stigter 4 Martina Hollstein 5 Matthias Baeye 6 Annemiek Vink 5 Laurenz Thomsen 2 Michael Schulz 1 ![]()
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