Stream modeling

River Engineering, River Morphology, Hydraulic Modeling, Flows, Hydraulic Works, Flooding, Impacts and Compensation
Discipline: Free Surface Hydraulics

This course provides students with solid skills in hydraulic modeling. The student learns the equations of free surface hydraulics in steady state and non-stationary. They learn how to go from the study field to the hydraulic model: by making topographic and hydrometric measurements, by observing hydraulic indices (flood marks, hydrogeomorphological formations, hydraulic jumps...) and then by establishing in situ hypotheses of river functioning.
Several scales can be explored depending on the chosen subject: the habitat scale, the developed reach scale, the flooding river scale. For each scale, students can study and implement specific structures (fish ladders, lateral weirs, weirs, dams, etc.) in their modeling. The impacts of the developments, maintenance and structures are simulated and analyzed in terms of hydrodynamics and hydraulic continuity.
The study is deployed on the same concrete case, from the field phase to the phase of presentation of the impacts of the developments, through modeling. The work is done in groups.

A field trip allows the students to analyze the terrain and conceptualize it in a topographic and hydraulic model. Hypotheses of in situ functioning are made and they will be confronted with the models and results.

Finally, the course offers students an analysis based on a real case of development or intervention in a watercourse, with an evaluation of the initial state, an analysis of the impacts of the intervention, and proposals for hydraulic compensation if necessary.

- Measure the topography of a real terrain; Locate in situ high water marks, hydrogeomorphological marks, flow areas
- Understand the mechanisms governing the equations of stationary and non-stationary free surface hydraulics and the role of boundary conditions
- Characterize a flow at different scales (the river, the reach, the structure, habitat)
- Set up a hydraulic model of a real developed reach
- Use the modeling tool to study the behavior of the water line at a structure and deduce the impact of the structure on the environment
- Defend their technical results orally (detailed and technical presentation).

UE of M1 S2 Ecological restoration (ecology, hydrology, morphology, continuities, restoration) or equivalent; MOOC of rivers and people, reading of Degoutte's work.

It is relevant to continue this UE with the UE of M2S3 Ecological engineering and restoration which will make it possible to extend the concept of continuity and hydraulic compensation to the concepts of continuities and ecological restorations and ERC sequences to put the environment in the projects of development and plans or programs of actions of and management of the catchment area.

Continuous assessment based on the final presentation of the project (and intermediate reports).