Annual meeting EUROPEAN WORKING GROUP on INTERNAL EROSION IN EMBANKMENT DAMS, DIKES and LEVEES & THEIR FOUNDATIONS 10-13 Sept 2018, Milano, Italy

Conference Chairs
      Cristina Jommi & Donatella Sterpi, Chairpersons of 26th Annual Meeting
      Stéphane Bonelli, Chairman of the European Working Group on Internal Erosion

Local Organizing Team
Politecnico di Milano
      Donatella Sterpi
      Cristina Jommi
      Marco Caruso
      Federica Aggio
      Silvia Spada
      Dario Mansi

Scientific committee
      Vera van Beek, Deltares, the Netherlands
      Stephane Bonelli, Irstea, France
      Rodney Bridle, Dam Safety Ltd, UK
      Carlo Callari, Unversità degli Studi del Molise, Italy
      Jonathan Fannin, University of British Columbia, Canada
      Cristina Jommi, Politecnico di Milano, Italy
      André Koelewijn, Deltares, the Netherlands
      Didier Marot, Université de Nantes, France
      Jaromir Riha, Brno University of Technology, Czech Republic
      Bryant Robbins, US Army Corps of Engineers, USA 
      Alexander Scheuermann, University of Queensland, Australia
      Donatella Sterpi, Politecnico di Milano, Italy      
     Akihiro Takahashi, Tokyo Institute of Technology, Japan

EWGIE_2018 Announcement

EWGIE 2018 Detailed_programme

EWGIE 2018 Proceedings

Day 1, September, 11th, 2018

Session 1: Laboratory techniques and findings (1/2) (Chair: Jonathan Fannin)

• Development of a new apparatus for the Jet Erosion Test (JET) (Boucher M., Béguin R., Courivaud J.-R.)
• New apparatus for assessing soil suffusion susceptibility under two flow directions (Marot D., Bendahmane F., T. Le Van)
• Viewing fluid flow inside a granular medium (Sanvitale N., Bowman E.T., Black J.A.)
• Effects of suffusion on the soil's mechanical behavior: experimental investigations  (Aboul Hosn R., Benahmed N., Nguyen C.D., Sibille L., Philippe P., Chareyre B.)

Session 2: Laboratory techniques and findings (2/2) (Chair: Didier Marot)

• Effects of void ratio and hydraulic gradient on permeability and suffusion of glacial till cores (Silva I., Viklander P., Laue J.)
• Uncertainty in determining the critical hydraulic gradient of uniform glass beads (Petrula L., Hala M., Říha J.)
• Experimental tests of soil reinforcement against erosion and liquefaction by microbially induced carbonate precipitation (Béguin R., Oxarango L., Sapin L., Garandet A., Viglino A., François E., Mora H., Martins F., Duchesne L., Albrecht D., Gutjahr I., Lépine L.)
• Experimental optimisation of Microbially Induced Calcite Precipitation (MICP) for contact erosion control in earth dams (Clara Saracho A., Haigh S.)
• Erosion of zoned earthfill dams by internal instability: laboratory testing for model development (Fannin J., Slangen P., Ataii S., McClelland V., Hartford D.)
• The role of seepage flow rate and deviatoric stress on the onset and progression of internal stability in a gap-graded soil (Gaber F., Bowman E.T.)

Session 3: From modelling to design criteria (1/2) (Chair: Akihiro Takahashi)

• Simplified estimation of some main characteristics of pores and constrictions in granular materials (Seblany F., Vincens E., Picault C.)
• Constitutive modeling of a suffusive soil with porosity-dependent plasticity (Rousseau Q., Sciarra G., Gelet R., Marot D.)
• Suffusion impact on the mechanical stability of granular materials (Wautier A., Nicot F., Bonelli S.)
• Reliability underseepage assessment of levees incorporating geomorphic features (Polanco-Boulware L., Rice J.)
• Modelling of backward erosion piping in two- and threedimensional domains (Robbins B.A., Griffiths D.V.)

Day 2, September, 12th, 2018

Session 4: From modelling to design criteria (2/2) (Chair: Elisabeth Bowman)

• Micro-scale flow conditions leading to the onset of erosion (Scheuermann A., Harshani H.M.D.,
  Galindo-Torres S.A.)
• Finite element analysis of internal erosion effect on the stability of dikes (Bouziane A., Benamar A., Tahakourt A.)
• A numerical procedure to simulate particle migration at the contact between different materials in earthfill dams (Federico F., Cesali C.)
• A numerical approach for the analysis of piping erosion in hydraulic works (Rotunno A.F., Callari C., Froiio F.)
• Numerical and physical modelling of seepage-induced internal erosion around holes on permeable sheet pile (Takahashi A., Kokaki H., Maruyama T., Horikoshi K.)

Session 5: Prevention measures and field assessment (1/2) (Chair:  Bryant Robbins)

• Investigating the formation of a filter cake in column experiments, for combinations of filter and fine sand in a coarse sand barrier (Akrami S., Bezuijen A., Rosenbrand E., Koelewijn A., Förster U., van Beek V.)
• Scale effects in coarse sand barrier experiments (Rosenbrand E., van Beek V., Koelewijn A., Akrami S., Förster U., van Gerven K., Bezuijen A.)
• Analytical groundwater flow calculations for understanding the flow and erosion in a coarse sand barrier (Bezuijen A., van Beek V., Rosenbrand E., Akrami S.)
• Detection of permeability defects within dams and levees through coupled seepage and heat transport analyses (Cesali C., Federico V.)
• The role of the hydraulic resistance of the river bed and the time dependent response of the foundation layers in the assessment of water defences for macrostability and piping (Garuti D., Jommi C., Rijkers R.)

Session 6: Prevention measures and field assessment (2/2) (Chair:  Esther Rosenbrand)

• Multidisciplinary analysis and modelling of a river embankment affected by piping (Bossi G., Bersan S., Cola S., Schenato L., De Polo F., Menegazzo C., Boaga J., Cassiani G., Donini F., Simonini P.)
• Impact of the use of 3D modeling on sand boil risk management (Giliberti M.D., Cirincione M., Cavagni A.)
• A statistical framework for incorporating sand boil observations in levee risk analysis (Robbins B.A., Doughty M., Griffiths D.V.)
• Assessing suffusion susceptibility of soils by using construction data: application to a compacted till dam core (Zhang L., Gelet R., Marot D., Smith M., Konrad J.-M.)

Session 7: Open issues for discussion and contribution (Chair:  Stéphane Bonelli)

• Collection and analysis of the reactivation data of the historical sand boils in the Po river levees (Aielli S., Pavan S., Parodi S., Rosso A., Tanda M.G., Marchi M., Vezzoli G., Pantano A., Losa D., Sirtori M.)
• Databases for backward erosion piping laboratory experiments and field observations (van Beek V., Wiersma A., van Egdom M., Robbins B.A.)
• An update on ICOLD Bulletin 164 on internal erosion (Bridle R.)
• Harmonization of terminology and definitions on soil deformation due to seepage (Říha J., Alhasan Z., Petrula L., Popielski P., Dąbska A., Fry J.J., Solski S.V., Perevoshchikova N.A., Landstorfer F.)

Day 3, September, 13th, 2018

Technical Tour