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The project EI-GEO “Environmental impact of geosynthetics in aquatic systems” of the Program ERA.Net RUS Plus (No RUS_ST2017-212) is supported via grants of national scientific funding agencies of Latvia (VIAA), Germany (BMBF) and Russia (RFBR).
Geosynthetics are widely used in hydraulic engineering in aquatic ecosystems such as in revetment measures for coastal protection or in ballast layers for wind energy plants. While providing various economic and technical benefits, the application of geosynthetics in hydraulic engineering projects has been questioned recently as these materials might degrade during their lifetime and induce a hazardous impact on the aquatic environment in a long term especially as the origin of plastic debris or as source/sink for chemicals such as plasticizers and stabilizers used in the production of geosynthetics to improve their performance.
The proposed project is aimed at assessment of the application of geosynthetics in hydraulic engineering. Accelerated artificial ageing of geotextiles used in marine applications will be applied in a laboratory scale and the performance characteristics will be compared with the virgin material. Whereby, a combination of mechanical, chemical and microbiological stress will be simulated. Additionally, the leaching behavior in relation to the ongoing ageing process as well as the ecotoxicological impact of leachates in marine environment will be investigated. The laboratory tasks will be accompanied by a field case study at the Kaliningrad shore.