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Dye Tracing Projects (1969 to present)

Out of more than 2500 successful dye tracing tests worldwide we decided to list the most significant ones. The list below shows the great variety of different hydrogeologic environments Otzhydro Inc. has worked in:

Legend for the dye abbreviations used at the bottom of this page.

Year

Project

Dyes used

2004

Muttenz, Switzerland: Determination of groundwater flow paths within and adjacent the landfill of the Basel pharmaceutical industry.

NAP, URA, EOS, PYR, SRB, SRG

2003

County Department of Environmental Conservation, Zug, Switzerland: Groundwater flow determination in old glacial erosion channels for Zürich, the largest city in Switzerland.

SRG, EOS, URA

2002

Swiss Department of Transportation, Manno, Switzerland: Impact assessment of the highway onto the water supply of the City of Lugano (population 80,000)

using all tracers listed under abbreviations

2001

Mineral Source, Zurzach and water supply of Town of Klingnau, Switzerland: Tracing the impact of agricultural practices in the vicinity (2.6 km) of the source. 

using all fluorescent tracers listed under abbreviations

2000

Holcim (www.holcim.com), Cumarebo, Venezuela: Impact assessment of quarry to adjacent springs.

URA, NAP, SRB

1999

Wasserwerke Zug, Switzerland: Determination of well head protection areas. 

using all fluorescent tracers listed under abbreviations

1998

County Department of Environmental Conservation, Solothurn, Switzerland: Swiss National Science Foundation: Hydrogeologic investigation of the Gempenplateau.

using all fluorescent tracers listed under abbreviations

1997

Swiss Federal Railway, AlpTransit, Piora, Switzerland: Second dye-tracing test for the longest railway tunnel on Earth over a distance of 17 km.

URA, PYR, NAP, SRG

1996

County Department of Environmental Conservation, Lucerne, Switzerland: Dye-tracing for ETH Zürich to evaluate preferential flow-paths in a large (10 km2) unconsolidated aquifer

Water Supply Horgen, Switzerland: Well head protection delineation

URA, EOS, NAP, SRB

using all tracers listed under abbreviations

1995

Pertusio, Santa Maria Valley, Switzerland: Determination of the Pertusio Spring watershed.

County Department of Environmental Conservation, Solothurn, Switzerland: Evaluation of preferntial flow paths in the Jura Mountains in collaboration with ETH Zürich.

URI, EOS, PYR, SRB, NAP, Duasine

using all fluorescent tracers listed under abbreviations

1994

Swiss Federal Railway, AlpTransit, Uri, Switzerland: Groundwater protection delineation.

Saudarkrokur, Iceland: Construction of mineral water well and design for future bottling factory including worldwide distribution.

URI, EOS, PYR, RWT, NAP, Duasine

1993

Swiss Federal Railway, AlpTransit, Piora, Switzerland: First dye-tracing test for the longest railway tunnel on Earth.

Saudarkrokur, Iceland: Mineral water prospection including source identification.

URA, EOS, PYR, NAP, Duasine

URA, NAP, EOS

1992

El Ghrass (above existing Mohammed V Dam), Taourirt, Marocco: Evaluation of possible leakage for future El Ghrass Dam. Work done for the King of Marocco Hassan II.

County Department of Environmental Conservation, Zug, Switzerland: Delineation of 7 well-head protection areas

URI, EOS, PYR, RWT, NAP, Duasine

7 dye-tracing tests totally using all fluorescent tracers listed under abbreviations

1991

Nuclear Power Plant, Neckar-Westheim, Germany: Infiltration determination and solution capacity of the Neckar River groundwater under the nuclear power plant to determine possible subduction. 

2 dye-tracing tests: URA EOS, PYR, RWT, NAP, Duasine

1990

Universal Travel Agency (www.universal-travel.com), Jolly Harbor, Antigua: Hydrogeologic assessment of a future port including 2000 planned residencies. Assessment included design to use renewable energy sources.

general hydrologic methods used

1989

Ciba-Geigy AG (www.ciba.ch), Kaisten, Switzerland: Investigation of the waste water treatment plant.

16 dye-tracing tests totally using all tracers listed under abbreviations

1988

Mineral water, Rhäzuns, Switzerland: Integrity test of the mineral water production line and assessment of possible contamination issues.

Background fluorescence

1987

Swiss National Science Foundation (www.snf.ch): Decrease of groundwater temperature using its thermal energy for heating purposes.

Mineral water, Rhäzuns, Switzerland: Well head protection delineation

general hydrologic methods used, URA, SRB,  EOS, HTO, NaCl, Borax

1986

Swiss Federal Railway, Zürich, Switzerland: Crossing of railway tunnel under the Limmat River, river water infiltration localization.

URA, SRB, SRG, RWT, EOS, PYR, Duasine

1984

Löwenbräu Brewery, Zürich, Switzerland: Integrity check of brewing water supply contaminated by intruding wastewater.

PYR, RWT, URA, EOS

1983

Neuhüsli, Neukirch, Switzerland: Site evaluation for future landfill. Tests included distances of 2 km in sandstone.

PYR, RWT,URA, EOS

1982

GWB (Gas und Wasserwerke), Town of Biel, Switzerland: Well-head protection evaluation of the Merlin Springs (80% of the city water supply)

2 dye-tracing tests using URA, EOS, PYR, SRB, SRG

1981

Parkhotel and County Laboratory, Brunnen, Switzerland: Groundwater investigation to use it for of heating purposes.

general hydrologic methods used

1980

Bettelberg, Lenk, Switzerland design, development and implementation of water supply in alpine terrain.

general hydrologic methods used

1979

Hardwasser AG, Pratteln, Switzerland: Integrity check of water supply for the City of Basel (population 200,000)

GWB (Gas und Wasserwerke), Town of Biel, Switzerland: Risk assessment for possible nuclear contamination of town water supply.

URA, SRB, EOS

1977-1979

Scientific evaluation of a possible deposit for high-level radioactive waste for NAGRA Swiss (www.nagra.ch)

general hydrologic methods used, 5 different dye-tracing tests using simultaneously NaCl, URA, SRB, SRG, PYR EOS, Duasin

1976

Hydrologic investigation on the future site of the nuclear power plant Gösgen, Switzerland

general hydrologic methods used, URA, SRB, SRG, EOS

1975

Swiss Federal Court expert opinion, Neuenegg, County of Bern, Switzerland: Delineation of industrial property versus well-head protection delineation.

NaCl, URA, SRG

1974

Vigier Inc. cements, Rondechâtel, Switzerland: Delineation of further querry excavation sites.

Selve Metall Processing factory, Thun, Switzerland: Delineation of well-head protection. 

NaCl, URA, SRG

1973

Village of Boll and Walkringen, county of Bern, Switzerland: Delineation of well-head protection. 

NaCl, URA, SRG

1972

SWG (Seeländische Wassergemeinschaft), Worben, Switzerland: Delineation of well-head protection. 

NaCl, URA, SRG

1971

Swiss County Court expert opinion, Horben, Switzerland on the Horben landslide.

general hydrologic methods used, no dye tracing

1970

Swiss Federal Railway, Bözingermoos, Switzerland: Site assessment study for large railway terminal situated in unconsolidated glacial material.

general hydrologic methods used, no dye tracing

1969

OFIMA (Officine Hydroelectrice della Maggia), Maggia Valley, Switzerland: integrity test of intake conduit of the Lago Cavagnioli Dam.

SRG, HTO

Fluorescent dye abbreviations:

URA

Uranine (or Na-fluoresceine)

CAS: 

NAP

Na-naphtionate

CAS:

EOS

Eosin

CAS:

SRB

Sulforhodamine B

CAS:

SRG

Sulforhodamine G extra

CAS:

PYR

Pyranine

CAS:

RWT

Rhodamine WT

CAS:

LIS

Lissamine

CAS:

NaCl

Table salt

HTO

Tritium

This page was last updated on 12/07/04 . Webpage created by Martin H. Otz, 2004.