How the change works
- 01 / Public decision
Cooperation between countries
- 02 / Physical change
Purification and continuity of the river
- 03 / Possible outcome
Migrations possible again
A river crosses multiple administrations: purifying drains and reopening passages requires coordinated management of the entire basin.
Research and local documents ↓What the evidence tells us
The International Commission for the Protection of the Rhine's Salmon 2020 program documents the return of salmon and reproduction in parts of the basin, together with work on fluvial continuity.
Putting the choices into practice
Quality
The challengeUndertreated drains
The responseControlled purification
Continuity
The challengeDams without passages
The responseFish passages
Coordination
The challengeIsolated decisions
The responseCoordination across the river basin
The diagram compares choices and conditions for putting them into practice. Measured outcomes and their limits are discussed in the evidence.
Research and local documents ↓Conditions and limits
The return of a species does not mean that every trait is in good condition. Temperature, residual obstacles, flow rates and other pollutants continue to count.
Other possible benefits
More connected river ecosystems and cooperation across administrative boundaries.
Research and local documents
- Local project or policy documentInternational Commission for the Protection of the Rhine · Salmon 2020 ↗
Institutional documentation of the program, territory or rules mentioned.
