Bukea messstation Bunthaus

Monitoring water and sediment quality

In Hamburg, with its many rivers, canals and lakes, it is particularly important to constantly monitor the water quality. The Institute for Hygiene and Environment (HU) carries out a variety of studies on behalf of the Authority for the Environment, Climate, Energy and Agriculture (BUKEA). Among other things, a water quality measuring network with nine fixed measuring stations provides continuous information on the condition of Hamburg’s rivers.

BUKEA messstation Bunthaus

coordinates Google Maps: 53.461684 , 10.064327

With the creation of this tidal shallow water area in the region of a former flushing field Spadenlander Busch / Kreetsand, the HPA kThe Bunthaus floating measuring station is of great importance for the evaluation of the Elbe water quality. This is where the Elbe reaches Hamburg, where the water quality is measured before it enters the port of Hamburg.

The station is equipped with automatic samplers so that samples are immediately available for detailed laboratory analysis in the event of anomalies. The type of contamination can be determined through the comprehensive analysis, which in turn may lead directly to the cause of the problem.

In addition to important data such as water temperature, oxygen content or turbidity, the station also has a modern nutrient monitoring system and a biological early warning system that immediately informs the HU employees about unusual pollution of the water.

Denise Babitsch - BUKEA ©Mark Schuurman - AnderBeeld.nl

Near the Bunthaus messtation Denise Babitsch (BUKEA) talks about the development of pollution in 30 years (1987-2018).

Even if the pollutants sources are far away (for instance in the Tjech Republic) due to the constant sediment transport the pollutions will ended up in Hamburg and in the North Sea.

The important questions are: Have pollution concentrations developed positively in the environmental context in recent decades? And if so, are these positive developments good enough?

For heavy metals (cadmium, lead, mercury and zinc) you see that from the middle of the year’s 90th the concentrations decrease. The reasons for this are the German reunification and the associated dismantling of industrial installations, the harmful environmental message, the improved production methods and the inventing and implementing of better machines, purification plans and filters.

For the organic pollution HCB you can see the positive effect of the Stockholm convention ban in 2004. For Fluoranthene and DDT the pattern is not so clear. The environmental protection measures of the past decades have had a positive effect and have led to a reduction in pollution concentrations. But we cannot estimate with these figures whether the reason for concentrations is a risk or not.

Therefore the International Commission for the Protection of the Elbe River implemented the Sediment Quality Index (SQI). This shows that DDT is still a huge problem for the Elbe. The Stockholm convention ban in 2004 did not change that. In 2017, an average of 10 of the 28 relevant contaminants exceeded the sediment quality thresholds. So there is still a lot of work to be done. And integrated sediment management is there for imperative.

Knowing more?

Presentation Denise Babitsch Pollutants in Elbe sediments then and now