1. 2D modelling of colmation and decolmation processes for river restoration
by Alex Stubbs, Cardiff University
Supervisors: Dr Bettina Bockelmann-Evans and Prof. Thorsten Stoesser

2. www.wisecdt.org Research aims
Extend the existing computational 2D model DIVAST to allow the simulation of colmation and decolmation processes and any resulting change in dissolved oxygen levels
To further understanding of microscopic turbulent flows in both the near-bed and infiltration zones
Utilise new experimental data, obtained using innovative techniques, for model verification and validation
To aid the development and assessment of river restoration schemes towards achieving WFD targets

3. www.wisecdt.org Major milestones so far
Completion of extensive literature review
Drafting of a review paper
Submission to the Journal of Hydrology by the end of June 2017
Poster presentation at the EGU2017 conference held in Vienna during April 2017

4. www.wisecdt.org The plan looking forward
Model Cardiff University’s narrow flume (0.3m wide) using DIVAST
Verification and validation data obtained through collaboration with another PhD student undertaking flume experimentation
Extend this model to allow colmation and decolmation processes to be simulated
Present findings to a targeted conference audience during 2018
Apply model to case study river reaches in South Wales
Collaborative work with Natural Resources Wales
Analyse findings and complete thesis writing for September 2019 submission

5. www.wisecdt.org In Summary Year 1 – Completed Year 2 – Just starting
Literature review completed
Review paper submitted
Poster presentation at EGU2017 conference
Year 2 – Just starting
Extension of DIVAST, validation and verification of model
Attendance at field specific conference
Application of model to case study scenarios
Year 3 – Looking forward
Analysis of results
Thesis write-up
For further information please contact: Alex Stubbs, Cardiff University