Classification table

This is the full list of potential inputs to the classification tables used for the various mitigation measures

Classification	Selection (multiple)
Fish species for the measure	Single or groups of fish species in Europe
Does the measure require loss of power production	Operational (requires flow release outside turbine)
	Operational (requires flow release through turbine)
	Structural (requires no additional flow release)
Recurrence of maintenance	Never
	Daily
	Weekly
	Yearly
	Less often than yearly
	Irregular at events
Which life-stage of fish is measure aimed at	Spawning / Recruitment
	Juvenile habitat (0+)
	Juvenile habitat (1+)
	Juvenile habitat (older than 1+)
	Adult fish
	Movements of migration of fish
Which physical parameter is mitigated	N/A
	Flow quantity
	Flow variations
	Substrate and hyporheic zone
	Water temperature
	Ice
	Water velocity
	Water depth
Hydropower type the measure is suitable for	Plant in dam
	Plant with bypass section
Dam height (m) the measure is suitable for	Categories in (m)
Section in the regulated system measure is designed for	In dam/power plant
	Upstream power plant
	Bypass section
	Downstream outlet
River type implemented	Steep gradient (up to 0.4 %)
	Fairly steep with rocks, boulders (from 0.4 to 0.05 %)
	Slow flowing, lowland, sandy (less than 0.05 %)
Level of certainty in effect	Very certain
	Moderately certain
	Uncertain
	Very uncertain
Technology readiness level	TRL 1: basic principles observed
	TRL 2: technology concept formulated
	TRL 3: experimental proof of concept
	TRL 4: technology validated in lab
	TRL 5: technology validated in relevant environment)
	TRL 6: technology demonstrated in relevant environment)
	TRL 7: system prototype demonstration in operational environment
	TRL 8: system complete and qualified
	TRL 9: actual system proven in operational environment