Department Water Resources and Drinking Water


The project investigates what measures are most effective in influencing a river corridor so that river restoration and groundwater flow systems can help to mitigate the effects of floods and droughts.
This project facilitates the exchange of data, maps and information on geogenic contaminants (focussing on arsenic and fluoride) via the web-based Groundwater Assessment Platform (GAP)
Water Resource Quality (WRQ) was an integrated project running from 2006-2012 at Eawag that aimed to develop a generally applicable framework for the mitigation of geogenic contamination in groundwater used for drinking.

Times Series of concluded Projects

Spot samples in river Glatt (1972 until 1977)


Along river Glatt and river Chriesbach, spot samples were taken in an approximately weekly rhythm at five different stations (excelsheet) from June 1972 until April 1977 (map).
In those samples physical, geochemical, anthropogenic parameters and heavy metals were measured.(analytical methods)


This project served as a pilot project for new extensive chemical examinations of flowing waters with regard to:

  • sample taking
  • sample preservation
  • chemical analysis
  • data preparation
  • data storage
  • data analysis
  • assessment of the water bodies

Apart from this, strongly polluted water from river Glatt was analyzed.

Data Files

Structure of the Data Files

  • measured data
  • loads
  • annual average of concentrations and loads
  • graphs of time series of concentrations and loads

Data Control


  • calculated anions / calculated cations
  • conductivity / total hardness
  • calculated conductivity / measured conductivity
  • total hardness / (sulfate + alkalinity)
  • Na/K, Na/Cl
  • nitrate / total nitrogen, (total nitrogen - nitrate) / suspended solids (where: total nitrogen = nitrite + nitrate + kjeldahl nitrogen)
  • DRP / total phosphor, (total phosphor - DRP) / suspended solids
  • DOC / TOC, (TOC – DOC) / suspended solids
  • maxima and minima, annual averages of concentrations and ratios compared with those of former years
  • temperatures and discharge proportions
  • plausibility of extreme values. Incorrect values were eliminated.

Publication List

Responsible Persons

Jürg Zobrist as project leader and Ursula Schoeneberger for data storage.

Data of different rivers from 1965 till 1973

Spot Samples of various Swiss Rivers from 1965 until 1973


Spot samples were taken and analysed in a quarterly rhythm at eight different stations (excelsheet) and map  distributed all over Switzerland from 1965 until 1973.

  • Aare - Bern, Felsenau
  • Aare - Beznau
  • Broye - Payerne
  • Doubs - Ocourt
  • Inn - Martinsbruck
  • Rhein - Sankt Margarethen
  • Rhône - Aïre
  • Rhône - Porte du Scex

Monitoring Program

In those samples, physical, geochemical and anthropogenic parameters were measured.(analytical methods)

Origin of Data

Data publication in the Hydrological Yearbook of Switzerland.

Data files

Data files

Aggregated Samples of Rhein - Schmitter  1972 /1973


At the hydrological monitoring station Rhein - Schmitter aggregated samples were collected  and analysed in an approximately weekly rhythm in 1972 and 1973.

Aim and Monitoring Program

Based on the program of International Commission for the Protection of the Rhine (IKSR) to analyse the input of nutrients from tributary waters into lake Bodensee, the hydrological monitoring station Rhein - Schmitter was equipped for continious water sampling, measuring and data recording. The  samples  were taken in a weekly rhythm and analysed at EAWAG on components of nitrogen and phosphor proportional to the discharge. At high water discharge (Q > 330 m3/sec) samples were collected in a lower cadence into a separate collector (samples may therefore overlap in collection time). Averages of water temperature, pH or conductivity originate from the continuous recording. The data were published in the Hydrological Yearbook of Switzerland.

Origin of Data

Data publication in the Hydrological Yearbook of Switzerland.

Data files

Data files