PHD offer – Geomorphology-based hydrochemistry – Rennes, France

PHD offer

UMR SAS, INRA-Agrocampus
Ouest, Rennes, France

Prof. Christophe
Cudennec

http://ift.tt/1FtQRlE

cudennec@agrocampus-ouest.fr

Geomorphology-based
analysis and modelling of hydrochemical dynamics in rural
watershed

Relief
is underlying the dynamics
of hydrological processes, and their space-time intergration of
the watershed
level. The drainage network is structuring within the relief: at
the local
scale through the drainage of flows from hillslopes and
wetlands; and at the
macroscopic scale by transferring flows towards the outlet where
a composite
signal finally emerges. Analysis, modelling and devonvolution of
this
structuring effect allow to understand and simulate the water
dynamics across
watersheds; to assess the effects of spatial arrangements of the
natural and
anthropogenic features within the watershed landscape, as well
as land
practices such as the agricultural ones; and to explore
hydro-geographic good
practices and alternatives.

Water
related chemical fluxes (nitrogen,
carbon…) are also structured by the drainage network, its
interfaces with
hillslopes and related compartments, and its overall geometry.
This structuring
effect is however much variable, depending on both chemical
elements and hydrological
variability, since diverse functionings enhance storage,
leaching,
transformations, dilutions…

Hydrogeomorphological
and
hydrochemical knowledge and methods have been extensively
developed within the
research unit UMR SAS, from several monitored rural watersheds
of the
agriculturally intensive Brittany region. These now allow to
develop original
coupling approaches. Hydrochemical
knowledge will
provide tracer informations to improve the geomorphology-based
hydrological
conceptualisation approaches. Conversely, the
hydrogeomorphological modelling  will
allow to transfer and generalize local-scale
hydrochemical knowledge towards mesoscale basins where societal
challenges are
huge (water pollution, green tides …). Finally the robustness of
the
geomorphology-based approach, enlarged to hydrochemical issues,
will open
avenues to explore scenarios of hydro-geographic land
management.

References

de
Lavenne, 2013
– 
Modélisation
hydrologique à base géomorphologique de bassins versants non
jaugés par régionalisation et transposition d’hydrogramme. PHD
thesis,
Agrocampus Ouest, Rennes. http://ift.tt/1K9cUn2

Publications
of the
agro-hydrology team: http://ift.tt/1FtQRBS

Conditions

3
years contract under the French regulations. National standard
salary for a
PHD. Starting October 2015.

Master
diploma mandatory in geoscience, agronomy, physical geography,
environmental
modelling…

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