The “National Long-term Surveillance of Swiss Rivers” (NADUF) program
was initiated in 1972 as a cooperative project between three
institutes:
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.