Suche...
Generic filters
Filter by Themen
Abwasserbehandlung
Analytik & Hygiene
Digitalisierung
Energie
Engineering
Events
Industriewasser
Kosten & Tarife
Nachhaltigkeit & Umweltschutz
Netze
Politik
Recht & Regelwerk
Wasseraufbereitung
Wassergewinnung
Wasserstress
Water Solutions
Filter by Kategorien
Branche
Forschung & Entwicklung
Leute
People
Products & Solutions
Produkte & Verfahren
Publications
Publikationen
Sonstiges
Trade & Industry
Filter by Kategorien
Firmenverzeichnis
Geschützte Downloads
Mediadaten
Öffentliche Downloads
Filter by Veranstaltungsschlagworte
abwasser
ACHEMA
Automatisierung
FDBR
kanalnetze
MSR
Talsperren
trinkwasser
wasseraufbereitung
wasserbau
Wassernetze
Wasserversorgung

Aquascope: shedding light on underwater life

Kategorie:
Thema:
Autor: Jonas Völker

Aquascope: shedding light on underwater life

The live images from the Aquascope reveal an amazing underwater world. Lake Greifen is home to a smorgasbord of wonderful creatures – star-shaped, cylindrical, horned or extravagantly coiffed. But as well as stimulating the imagination, the phyto- and zooplankton floating in water serves as an indicator of the ecological status of surface waters. Plankton observation is therefore of crucial importance in the monitoring of surface water quality. Here, the Aquascope can make a significant contribution. It is based on the Scripps Plankton Camera (SPC, developed by the Jaffe Laboratory for Underwater Imaging at the University of California, San Diego), consisting of a powerful LED light source and a dual-magnification underwater imaging microscope. Water, together with drifting plankton, flows freely through the space between the light source and the lenses, so that the life-forms can be observed undisturbed in their natural environment. This is a major advantage, as the sensitive organisms no longer need to be captured and removed from their habitat, with the natural aggregation of species being disrupted as a result.

Sharp images in spite of murky waters

The SPC, originally developed for marine ecosystems, was adapted for use in lakes by biologist Francesco Pomati and colleagues from the Aquatic Ecology department: "We modified the configuration of the instrument, incorporating two lenses of different magnifications and shortening the distance between light source and camera. This was to ensure that, even in turbid lake water, sufficient light reaches the objective lenses to produce sharp images." As only scattered light from the objects detected is imaged, the microorganisms appear bright against a dark background.
Since April 2018, the Aquascope has been deployed for a trial period at the research platform on Lake Greifen. All year round, it produces one image per second for ten minutes of every hour. A computer embedded in the Aquascope transmits high-resolution images in real time to Eawag. Here, Pomati’s group can analyse the images on a screen just a few minutes later.

Das könnte Sie auch interessieren:

Online-Seminar zur Generalentwässerungsplanung
VKU erweitert Vorstand und nimmt Mitglieder auf
Honorary Fellowship Award goes to Harry Seah

Passende Firmen zum Thema:

Publikationen

Water Sensitive Urban Design as a Role Model for Water Management in Germany?

Water Sensitive Urban Design as a Role Model for Water Management in Germany?

Autor: Jacqueline Hoyer / Juliane Ziegler
Themenbereich: gwf - Wasser|Abwasser
Erscheinungsjahr: 2013

“Water Sensitive Urban Design” (WSUD), originally developed in Australia, is a planning and design approach combining the functionality of water management with principles of urban design. WSUD is mainly used in the development of integrated ...

Zum Produkt

Tertiary Filtration with Ultrafiltration Membranes in Municipal Wastewater Treatment Plants

Tertiary Filtration with Ultrafiltration Membranes in Municipal Wastewater Treatment Plants

Autor: Martin Wett and Eberhard Back
Themenbereich: gwf - Wasser|Abwasser
Erscheinungsjahr: 2011

During the operation of tertiary filtration stages in a dead-end-mode, retentate concentrate and rinsing water from membrane cleaning accrue naturally. Work on process solutions for these process waters with no additional particle loads for the ...

Zum Produkt

Water Solutions – 01 2017

Water Solutions – 01 2017

Themenbereich: Water Solutions
Erscheinungsjahr: 2017

The leading professional magazine for water and wastewater ...

Zum Produkt

Mehr Publikationen...