The “National Long-term Surveillance of Swiss Rivers” (NADUF) program was initiated in 1972 as a cooperative project between three institutes: the Federal Office for the Environment (BAFU), the Swiss Federal Institute of Aquatic Science and Technology (EAWAG) and since 2003 the Swiss Federal Institute for Forest, Snow and Landscape Research (WSL).
With the NADUF program, the chemical-physical state of Swiss rivers as well as intermediate-term and long-term changes in concentration are observed. Furthermore, it provides data for scientific studies on biological, chemical and physical processes in river water. The NADUF network serves as a basic data and sampling facility to evaluate the effectiveness of water protection measures and for various scientific projects.
These data are for information purposes only. They are not binding for legal purposes. Expert advice is necessary for proper assessment. The NADUF group cannot be held responsible for the comprehensiveness or the correctness of the published data. The NADUF group is authorized to change, delete or complete parts of the data or even the entire data set without prior notification or no longer publish temporarily or permanently.
The user of these data accepts that their use is at one's own risk and that neither the NADUF group nor BAFU, EAWAG, WSL can be made liable in case of direct or indirect damage. The following published data may not be used without reference.
The excel files are created with the PC dataformat and consist of 8 sheets:
The data files contain a sheet with the analyzed concentration in a 14 days rhythm and in the original rhythm.
The data files are regularly updated. Details on the changes and file versions are available from Ursula Schoenenberger.
The Version File provides informations about changes in the dataset or useful remarks about the existing data.
Google Earth is a virtual globe, map and geographical information program that can be freely downloaded via http://www.google.com/earth/index.html. The two files (NADUF.e.kml und Catchment.kmz) can be downloaded (Folder in ZIP-format) to the desktop and opened with Google Earth.
NADUF.e.kml: This file shows the position of the station. By clicking on a map-pin you get an information window with details of the station, river and catchment area:
mean discharge, river length
area, average altitude, average precipitation, average terrain slope, average terrain aspect, number of inhabitants, landuse, region, typ of landscape, geology, geotechnics
information to discharge, temperature and chemical parameters (arithmetical mean over the whole time of sample collection, interval and numbers of samples)
Catchment.kmz: This file generates the borders (lilac) of the according catchment area on the Google Eath globe. The choice is made in the left-hand window in "Temporary Places" under EZG.
The presentation of the catchment areas is consuming much processing power, therefor the presentation of several catchment areas at the same time might slow down Google Earth considerably.
Due to the reduction to only two dimension large catchment areas can not be presented without slight deformation.
Small catchment areas are visible only when zoomed into the corresponding region.
Download: NADUF_GoogleEarth (This is a Folder in ZIP-Format. If not automatically extracted after downloading do it manuelly.)