CIS ECOSTAT - HYDROMORPHOLGY WORKSHOP 12th and 13th June 2012 - Brussels. Hydropeaking and minimum flow : the French approach. P. Baran. Pôle Ecohydraulique. French context of water storage. Total amount of water per year in stream : 200 billion m3
12th and 13th June 2012 - Brussels
Analysis of flow regime
Characterization of fish habitats by hydraulic models and habitat preference curves of species and life-stages
Approach based on hydraulic models and habitat mapping
Number of hydropeaks
Rate of change
Chaum - 2006
Valentine - 2006
Mountain steep stream : hydraulic conditions during high flow
Lez river (MD : 1 m3/s)
Hydrologic perturbation very marked, maximum discharge 4 m3/s (≈4 times MD), between 150 and 300 hydropeaks per year.
Braided streams :
Hourly variations on wetted perimeter dewatering fish habitats on shallow shoreline areas and trapping fry in disconnected secondary channels
Line of lakes and hydropower plants
Hydrologic perturbation very marked, maximum discharge 35 m3/s (≈1,8 times MD), between 150 and 300 hydropeaks per year.
Hydrologic perturbation marked or very marked, maximum discharge 340 m3/s (≈3.2 times MD), between 100 and 240 hydropeaks per year.
Back to base flow
During a hydropeak
Minimum flow of stream.
Changes in fish communities in relation to low flow conditions