Contact DE | FR | EN
 

Ecomorphology Level I (regional survey)

Rivers and streams are surveyed across entire regions in order to assess the naturalness of watercourses. The following structural parameters are evaluated:   Rivers and streams are surveyed across entire regions in order to assess the naturalness of watercourses.
  • variability of water width
  • modifications of the channel bed
  • modifications of the river banks
  • width and structure of the riparian zone.
     
Parameters assessed in the method "Ecomorphology Level I" are shown in the cross section of a near natural river reach and an unnatural river reach in the figures to the right.   Parameters assessed in the method "Ecomorphology Level I" are shown in the cross section of a near natural river reach

Evaluation

When the individual parameters have been evaluated using a points system, sections of rivers and streams are assigned to one of four different
  Bewertung e

categories and can then be mapped using colour codes so as to provide a rapid overview of the ecomorphological state of a region's watercourses.

In 1998, the Ecomorphology module (Level R) was the first method of the Modular Stepwise Procedure to be published, and since then it has been used by the cantonal authorities.

 

Box

Methode Ökomorphologie
Module Ecomorphologie
  • Description de la méthode Ecomorphologie niveau R
    [3.4 MB]
 
Strukturen der Fliessgewässer in der Schweiz
  • BAFU Publikation zum ökomorphologischen Zustand der Fliessgewässer in der Schweiz [9 MB]
Ecomorphologie des cours d'eau suisses
  • Publication de l'OFEV concernant l'état écomorphologique des cours d'eau en Suisse [10 MB]