ICPR – International Commission for the Protection of the Rhine

Technical reports


The water quality of the Rhine and its tributaries is constantly monitored as part of the surveillance monitoring at the international monitoring sites. For the identification of the development of the Rhine water quality, these data are regularly compiled, validated and…

Read more »

The synthesis report presents the results of the biological inventories within the 3rd monitoring cycle (2018/2019) within the framework of the third internationally coordinated river basin management plan for the international river basin district (IRBD) Rhine as well as the…

Read more »

Within the framework of the action programmes "Rhine" and "Rhine 2020" of the International Commission for the Protection of the Rhine (ICPR), comprehensive surveys of the Rhine fish fauna according to comparable criteria have been carried out along the entire length of the Rhine…

Read more »

Waterbirds are visible and good indicators of the ecological quality of their habitats, showing the general status and trends in the habitats they use. On average, during the winters 2015/16 to 2017/18, the Rhine Valley was home to over 1.1 million native waterbirds of 70…

Read more »

The species diversity and dominant species proportions of the macrozoobenthos (invertebrates living on the river bottom) is an indicator of water quality, and of the quantity and quality of habitat structures in a water body. The increasing establishment of thermophilic invasive…

Read more »

Diatoms are microscopic small single-celled algae. Due to their great species diversity, their widespread occurrence and their sensitivity concerning the physical-chemical characteristics of their habitat they are excellent bio-indicators. During 2018/2019, 340 species of benthic…

Read more »

Aquatic macrophytes (aquatic plants) may be used to assess the substance pollution of rivers, but they also reflect interferences with the discharge regime and structural conditions in water bodies. Within the measurement programme 2018/2019, 49 sampling stations were analysed,…

Read more »

Plankton are mostly microscopic small organisms floating in the water. The major share of aquatic vegetation here consists of single-celled algae, the so-called phytoplankton. In 2018, within the Rhine monitoring programme ‘Biology’, the phytoplankton of the Rhine was analysed…

Read more »

In the Rhine basin, the year 2018 was marked by a pronounced precipitation deficit in the months from February to November. Initially, this resulted in a marked low water level in the smaller bodies of water and increasingly in the course of the year also in the entire Rhine,…

Read more »