The resuspension of sediment leads to an increased release of nutrients and organic substances into the overlying water column, which can have a negative effect on the oxygen budget. Especially in the warmer months with a lower oxygen saturation and higher biological activity, the oxygen content can reach critical thresholds in estuaries like the upper Elbe estuary. Many studies have dealt with the nutrient fluxes that occur during a resuspension event. However, the sediment properties that influence the oxygen consumption potential (OCP) and the different biochemical processes have not been examined in detail. To fill this gap, we investigated the biogeochemical composition, texture, and OCP of sediments at 21 locations as well as the temporal variability within one location for a period of 2 years (monthly sampling) in the upper Elbe estuary. The OCP of sediments during a seven-day resuspension event can be described by the processes of sulphate formation, nitrification, and mineralisation. Chlorophyll, total nitrogen (N_total), and total organic carbon showed the highest correlations with the OCP. Based on these correlations, we developed a prognosis model to calculate the OCP for the upper Elbe estuary with a single sediment parameter (N_total). The model is well suited to calculate the oxygen consumption of resuspended sediments in the Hamburg port area during the relevant warmer months and shows a normalised root mean squared error of < 0.11 ± 0.13. Thus, the effect of maintenance measures such as water injection dredging and ship-induced wave on the oxygen budget of the water can be calculated.

沉积物的重新悬浮导致营养物质和有机物质更多地释放到上覆水体中，这可能对氧气预算产生负面影响。特别是在氧饱和度较低、生物活性较高的温暖月份，易北河河口上游等河口的氧含量可能达到临界阈值。许多研究都涉及重悬浮事件期间发生的营养通量。然而，影响耗氧潜力（OCP）和不同生化过程的沉积物特性尚未得到详细研究。为了填补这一空白，我们研究了易北河口上游 21 个地点沉积物的生物地球化学成分、质地和 OCP，以及一个地点 2 年期间内的时间变化（每月采样）。 7 天再悬浮事件期间沉积物的 OCP 可以通过硫酸盐形成、硝化和矿化过程来描述。叶绿素、总氮 ( N_总) 和总有机碳与 OCP 的相关性最高。基于这些相关性，我们开发了一个预测模型，用于计算具有单一沉积物参数（N_总）的易北河河口上游的 OCP。该模型非常适合计算汉堡港区在相关温暖月份内悬浮沉积物的耗氧量，并显示归一化均方根误差 < 0.11 ± 0.13。由此，可以计算注水疏浚和船舶诱导波等维护措施对水体氧收支的影响。