Construction of digital terrain model (MNT) and digital surface model (MNS) for hydraulic modeling applications

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Name of the project : Construction of digital terrain model (MNT) and digital surface model (MNS) for hydraulic modeling applications

Type of project (internship / thesis / post-doc / ANR...) : Internships

Summary: IFSTTAR (coordinator of the ANR PICS project) and IGN jointly defined the internship topic. The general goal was to provide a description of the terrain /that could be adapted to flood simulation modeling inputs. The objectives, most notably, were to adapt existing NTMs to: 1) remove artefacts and certain non-relevant landscape features (e.g. bridges); 2) restore continuity in the representation of underground watercourses, thus allowing for runoff; 3) attribute heights to potentially obstructing landscape elements (e.g. buildings) and,; 4. delimit the banks of the riverbed. The treatments are written in Python 3 scripts for QGIS and allow for the production of new MNTs. The effects of these adaptations of the MNTs were tested by relaunching flood simulations.

Name of supervisor(s) : Laurence Jolivet (LaSTIG, IGN) ; Olivier Payrastre (IFSTTAR Nantes, GERS-EE)

Name of student(s): Jérémy Kalsron

Start and end of the project : 2019-04-01 - 2019-08-30

Duration : 5 months