Université de Neuchâtel

Characterizing Water Circulation and Contaminant Transport in Lake Geneva Using Bacteriophage Tracer Experiments and Limnological Methods

Goldscheider, Nicola ; Haller, Laurence ; Poté, John ; Wildi, Walter ; Zopfi, Jakob

In: Environmental Science & Technology, 2007, vol. 41, no. 15, p. 5252–5258

Multi-tracer tests with three types of marine bacteriophages (H4/4, H6/1, and H40/1), together with various limnological methods, including physicochemical depth profiling, surface drifters, deep current measurements, and fecal indicator bacteria analyses, have been applied to characterize water circulation and pathogen transport in the Bay of Vidy (Lake Geneva, Switzerland). The experimental...

Université de Neuchâtel

Review: Thermal water resources in carbonate rock aquifers

Goldscheider, Nicola ; Mádl-Szőnyi, Judit ; Erőss, Anita ; Schill, Eva

In: Hydrogeology Journal, 2010, vol. 18, no. 6, p. 1303-1318

The current knowledge on thermal water resources in carbonate rock aquifers is presented in this review, which also discusses geochemical processes that create reservoir porosity and different types of utilisations of these resources such as thermal baths, geothermal energy and carbon dioxide (CO2) sequestration. Carbonate aquifers probably constitute the most important thermal water...

Université de Neuchâtel

Markierungsversuche und Modellierung zur Bewertung der Gefährdung eines Trinkwasserbrunnens = Tracer experiments and modelling for risk assessment of a drinking water well

Goldscheider, Nicola ; Milnes, Ellen ; Fries, W. ; Joppen, M.

In: Grundwasser, 2008, vol. 13, no. 4, p. 220-230

A tracer experiment with uranine in a gravel aquifer aimed to assess the risk of a drinking water well near Pratteln, Switzerland, resulting from a contaminated site 760 m further upgradient. The experiment revealed a maximum linear flow velocity of 127 m/d and a mass recovery of 0.93 %. The tracer was also detected at two intermediate monitoring wells. This paper discusses the causes of...

Université de Neuchâtel

Using tracer tests and hydrological observations to evaluate effects of tunnel drainage on groundwater and surface waters in the Northern Apennines (Italy)

Vincenzi, Valentina ; Gargini, Alessandro ; Goldscheider, Nicola

In: Hydrogeology Journal, 2009, vol. 17, no. 1, p. 135-150

The impact of a railway tunnel on groundwater and surface waters in the Northern Apennines (Italy) was demonstrated and characterised by multi-tracer tests and hydrological observations. The 15-km-long Firenzuola tunnel crosses turbidite marls and sandstones previously not considered as aquifers. During the drilling, water inrushes occurred at fracture zones, and the tunnel still continues to...

Université de Neuchâtel

Comparative application of four methods of groundwater vulnerability mapping in a Slovene karst catchment

Ravbar, Nataša ; Goldscheider, Nicola

In: Hydrogeology Journal, 2009, vol. 17, no. 3, p. 725-733

Four methods of groundwater vulnerability mapping have been applied in a Slovene karst catchment and validated by tracer tests. The test site is characterised by high water table fluctuations, manifested in intermittent lakes and variable drainage divides. A first multi-tracer test (two injections) allowed subdivision of the catchment into zones of different degrees of contribution (‘inner...

Université de Neuchâtel

Microbial communities in karst groundwater and their potential use for biomonitoring

Pronk, Michiel ; Goldscheider, Nicola ; Zopfi, Jakob

In: Hydrogeology Journal, 2009, vol. 17, no. 1, p. 37-48

The structure, diversity and dynamics of microbial communities from a swallow hole draining agricultural land and two connected karst springs (Switzerland) were studied using molecular microbiological methods and related to hydrological and physicochemical parameters. Storm responses and an annual hydrological cycle were monitored to determine the short- and long-term variability, respectively,...

Université de Neuchâtel

Geological structure, recharge processes and underground drainage of a glacierised karst aquifer system, Tsanfleuron-Sanetsch, Swiss Alps

Gremaud, Vivian ; Goldscheider, Nicola ; Savoy, Ludovic ; Favre, Gérald ; Masson, Henri

In: Hydrogeology Journal, 2009, vol. 17, no. 8, p. 1833-1848

The relationships between stratigraphic and tectonic setting, recharge processes and underground drainage of the glacierised karst aquifer system ‘Tsanfleuron-Sanetsch’ in the Swiss Alps have been studied by means of various methods, particularly tracer tests (19 injections). The area belongs to the Helvetic nappes and consists of Jurassic to Palaeogene sedimentary rocks. Strata are folded...

Université de Neuchâtel

A new quantitative interpretation of the long-tail and plateau-like breakthrough curves from tracer tests in the artesian karst aquifer of Stuttgart, Germany

Goldscheider, Nicola

In: Hydrogeology Journal, 2008, vol. 16, no. 7, p. 1311-1317

In 1998 and 1999, two multi-tracer experiments were conducted in the artesian karst aquifer of the mineral springs of Stuttgart, Germany. The breakthrough curves (BTCs) monitored at the springs showed very long tails or developed plateau-like concentration levels for more than 200 days. Initially, this observation was qualitatively explained by exchange between cavities with stagnant water and...