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Alfred Johny Wüest

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Publications associées (118)

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Anleitung zur Analyse von Sauerstoffzehrung und Netto-Ökosystemproduktion in Seen. Arbeitshilfe zur Ermittlung relevanter Grössen der Trophie von Seen

Alfred Johny Wüest, Isabel Blanca Sophie Kiefer

Diese Arbeitsanleitung bietet einen Leitfaden zur Analyse der Sauerstoffzehrung und der Netto-Ökosystemproduktion in Seen. Diese beiden Grössen bilden wichtige Grundlagen zur Bestimmung der See-Gesundheit und ermöglichen, deren zeitliche Entwicklung zu unt ...

Eawag2021

Lake Brienz project: An interdisciplinary catchment-to-lake study

Alfred Johny Wüest

Birkhauser Verlag Ag2007

Hypolimnetic Oxygen Depletion in Eutrophic Lakes

Alfred Johny Wüest, Beat Mueller

The oxygen-consuming processes in the hypolimnia of freshwater lakes leading to deep-water anoxia are still not well understood, thereby constraining suitable management concepts. This study presents data obtained from 11 eutrophic lakes and suggests a mod ...

Amer Chemical Soc2012

Simulation of CO2 concentrations, temperature, and stratification in Lake Nyos for different degassing scenarios

Alfred Johny Wüest

[ 1] A large gas cloud erupted unexpectedly in 1986 from Lake Nyos, the larger of the two Cameroonian "Killer Lakes,'' with devastating consequences. Regular monitoring subsequently revealed that the deep water of the lake was gradually recharged with CO2. ...

Amer Geophysical Union2006

Correction to: Inhibited vertical mixing and seasonal persistence of a thin cyanobacterial layer in a stratified lake (vol 83, 38, 2021)

Alfred Johny Wüest, Oscar Rodrigo Sepúlveda Steiner, Bieito Fernandez Castro

2021

An automated calibration framework and open source tools for 3D lake hydrodynamic models

Alfred Johny Wüest, Damien Bouffard, Andrea Cimatoribus, Theo Baracchini

Understanding lake dynamics is crucial to provide scientifically credible information for ecosystem management. In this context, three-dimensional hydrodynamic models are a key information source to assess critical but often subtle changes in lake dynamics ...

2020

Accelerated Water Quality Improvement during Oligotrophication in Peri-Alpine Lakes

Alfred Johny Wüest, Beat Mueller

Monitoring of four eutrophic Swiss lakes undergoing oligotrophication during more than 25 years (i.e., gradually decreasing nutrient loading, productivity, and associated symptoms of eutrophication) revealed that phosphorus (P) net sedimentation rates (the ...

Amer Chemical Soc2014

Potential zur Wärmeenergienutzung aus dem Zürichsee. Machbarkeit. Wärmeentzug (Heizen) und Einleitung von Kühlwasser

Alfred Johny Wüest

Künftig soll der Zürichsee als Wärmeenergiequelle und als Wärmeenergiespeicher intensiver genutzt werden. Einerseits eignet sich das kühle Tiefenwasser des Sees im Sommer ideal zur Kühlung der urbanen Infrastruktur und zur Ableitung von Prozesswärme (Wüest ...

2012

Effects of climate change on deepwater oxygen and winter mixing in a deep lake (Lake Geneva): Comparing observational findings and modeling

Alfred Johny Wüest, Damien Bouffard, Robert Vincent Schwefel

Low concentrations of dissolved oxygen remain a global concern regarding the ecological health of lakes and reservoirs. In addition to high nutrient loads, climate-induced changes in lake stratification and mixing represent additional anthropogenic menace ...

American Geophysical Union2016

Effects of upstream hydropower operation on riverine particle transport and turbidity in downstream lakes

Alfred Johny Wüest

[ 1] Retention in upstream storage dams results in modified riverine water and particle discharge patterns. Particularly, suspended solids input and intrusion dynamics in downstream lakes are affected by dam operations. In a case study, size-dependent part ...

Amer Geophysical Union2006

Is Lake Prespa jeopardizing the ecosystem of ancient Lake Ohrid?

Alfred Johny Wüest

Lake Prespa and Lake Ohrid, located in south-eastern Europe, are two lakes of extraordinary ecological value. Although the upstream Lake Prespa has no surface out flow, its waters reach the 160 m lower Lake Ohrid through underground hydraulic connections. ...

Springer2006

A high resolution bathymetric map of Lake Kivu's northern basin: locating significant groundwater inflows through a geomorphologic interpretation

Alfred Johny Wüest

SwissSed2012

Microsensor for in situ flow measurements in benthic boundary layers at submillimeter resolution with extremely slow flow

Alfred Johny Wüest

The currents in the lowest few millimeters of the bottom boundary layer of lakes are highly important for the dissipation of kinetic energy and for chemical processes such as oxygen transfer into the sediment. So far, no high-resolution flow velocity profi ...

Association for the Sciences of Limnology and Oceanography (ASLO)2007

Application of remote sensing for the optimization of in-situ sampling for monitoring of phytoplankton abundance in a large lake

Alfred Johny Wüest, Damien Bouffard, Isabel Blanca Sophie Kiefer

Directives and legislations worldwide aim at representatively and continuously monitoring the ecological status of surface waters. In many countries, chlorophyll-a concentrations (CHL) are used as an indicator of phytoplankton abundance and the trophic lev ...

Elsevier2015

Application of coherent ADCP for turbulence measurements in the bottom boundary layer

Alfred Johny Wüest

This paper presents a novel approach for estimating the rate of turbulent kinetic energy dissipation from pulse-coherent acoustic Doppler current profiler (ADCP) measurements using the inertial dissipation method. Although the inertial dissipation techniqu ...

Amer Meteorological Soc2005

Life under ice in Lake Onego (Russia) - an interdisciplinary winter limnology study

Alfred Johny Wüest, Natacha Pasche

2019

Le Lac de Zurich en Ligne - Prévisions hydrodynamiques 3D en temps-réel sur meteolakes.ch. Aqua & Gas - Fachzeitschrift für Gas, Wasser und Abwasser

Kevin Alexandre Bärenzung, Alfred Johny Wüest, Damien Bouffard, Theo Baracchini

Les lacs constituent d’importantes ressources en eau potable en Suisse, château d’eau de l’Europe. Pourtant, ils sont souvent négligés dans le cycle hydrologique global. Menacés à la fois à l’échelle globale par les changements climatiques, ainsi qu’à l’éc ...

2019

Lake Dianchi Kunming, Project Clear Lake. Summary Phases 1, 2 and 3. Schlussbericht und Zusammenfassung

Alfred Johny Wüest

Das Projekt "Klarer See" wurde durch Kunming und die SWISSWATER GmbH im April 2009 gestartet. Bis Januar 2012 wurden bereits 3 Projektphasen erfolgreich abgeschlossen, präsentiert und in mehr als 10 Berichten ausführlich dokumentiert. In allen Phasen wurde ...

2012