“Hydropeaking“ in rivers and streams is becoming a problem for water ecology, particularly for fish. Rapid change in the release of water from alpine hydroelectric power stations leads to artificial discharge variations on a daily and weekly basis. Of Switzerland’s larger rivers, one in four is influenced by such water surges. Together with the wide-spread river training and channelisation, such intermittent flow is one of the main causes for the biological deficits that can be observed, for example, in the valleys of the Rhone. The success of revitalisation measures necessary in channelled waters depends on many factors but it may be put into question if the reduction of such surges is not considered.
The Rhone-Thur project is being carried out by the research institutes Eawag and WSL as well as by the hydrology institutes at the ETH in Zurich and the EPFL in Lausanne. The results concerning hydropeaking are now available. The rapid increase and ebbing away of water in riverbeds as a consequence of the use of hydropower has a distinct influence on ecological entegrity in addition to the river morphology deficits.
Andri Bryner | alfa
Jacobs University supports new mapping of Mars, Mercury and the Moon
21.03.2018 | Jacobs University Bremen gGmbH
Thawing permafrost produces more methane than expected
20.03.2018 | GFZ GeoForschungsZentrum Potsdam, Helmholtz Centre
In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.
Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...
Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.
They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...
A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...
For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.
In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...
Animal photoreceptors capture light with photopigments. Researchers from the University of Göttingen have now discovered that these photopigments fulfill an...
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