Hydraulic signatures for ecological modelling at different scales

Signatures hydrauliques pour la modélisation écologique à différentes échelles

Y. Le Coarer (1)

1 UR HYAX - Hydrobiologie

The quantitative description of the aquatic space is essential for ecohydraulic modelling. It is recommended to quantify the hydraulic variety for a given flow and any area of the aquatic space by calculating the volume or surface percentages in a depth and current velocity cross-classification. This representation in the velocitydepth plane is called a hydraulic signature. HydroSignature' is a free beta software used to calculate signatures and can be downloaded at: http://hydrosignature.aix.cemagref.fr/ Its calculation principle through decomposition into finite elements is based on three different field data collecting types: (1) depthcurrent velocity measurements in unspecified locations, (2) descriptions using cross-sections and (3) use of a triangular irregular network (TIN). Using signatures in fish habitat models is recommended to avoid extrapolating outside limits when determining taxa preference during hydraulic simulations at different flow regimes.

Domaines: Sciences de l'environnement

Y. Le Coarer. Hydraulic signatures for ecological modelling at different scales. Aquatic Ecology, 2007, pp.9. ⟨10.1007/s10452-005-9005-3⟩. ⟨hal-02588851⟩