Continuing Education Short Courses

The Western Dredging Association (WEDA) is proud to offer two (2) continuing education courses at the 2017 Dredging Summit & Expo. These courses will be held at the Hyatt Regency Vancouver on Monday June 26, 2017. Slurry Transport is scheduled for the morning session, from 8AM to noon. The Safety short course “The Big Hug and the Bottom Line” will be held in the afternoon from 1-5 PM. For each course that you participate in, you will receive a certificate for 4 professional development hours (PDH’s). 

Registration fees:
WEDA Members: $150 per course
Non-Members: $200 per course
CLICK HERE to register for the Continuing Education Short Courses.

Short Course Title: “Slurry Transport (updated with the latest develepoments)”

Date: June 26, 2017
Time: 8AM to Noon

Sape Miedema, Educational Director, Delft University of Technology
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Preface: In August 2012, Sape Miedema was approached by a dredging company with the question which head loss model to use for a project with a cutter dredge and a discharge length of 35 km. This raised the following questions:

  • What did the company want to know?
  • How many booster stations to use?
  • What should be the locations of the booster stations?
  • What were the real issues?
  • What should be the total pump pressure to avoid plugging the line?
  • Where to locate the booster stations to avoid cavitation at the entrance of each pump?
  • How does this depend on the particle size distribution?

These questions triggered a study in to the existing head loss models. With the knowledge that the main Dutch and Belgium dredging contractors use the Durand & Condolios (1952) and Fuhrboter (1961) models in a modified form, while companies in the USA and Canada often use the Wilson (1992) model in a modified form or the SRC model, the study started with a comparison of these models. Other models that were investigated were the Newitt et al. (1955) model, the Doron & Barnea (1987) model, the Matousek (1997) model and others. Also later models like the 4 component Sellgren & Wilson (2012) model and the 2LM and 3LM models of Wilson (1979-2014) and Matousek (1997-2014) were investigated.

Usually the models perform well in the neighborhood of the parameters used during the experiments, especially the pipe diameter (small) and the particle diameter, but for real life conditions (large pipe diameters) the models deviate and it’s not clear which model matches these conditions. Another issue is that most models are derived for transport (delivered) volumetric concentrations as input and not the spatial volumetric concentrations. The research into the existing models did not give a satisfactory result to the above questions.

Reason to develop a new model from scratch, the Delft Head Loss & Limit Deposit Velocity Framework. This DHLLDV Framework is based on the spatial volumetric concentration in the pipe and uniform sands or gravels and consists of a framework containing a set of sub-models.

  1. The fixed or stationary bed model.
  2. The sliding bed model.
  3. The heterogeneous transport model.
  4. The homogeneous transport model.
  5. The sliding flow model.
  6. The limit deposit velocity model.
  7. The holdup or slip factor model.
  8. The concentration distribution model.
  9. The bed height model. 


Short Course Title: The Big Hug and The Bottom Line: A Model for Safety Culture Change that Drives Operational Excellence

Date: June 26, 2017
Time: 1PM to 5PM

Julie Hile, President, Hile Group
Margaret Davis, Performance Consultant, Hile Group
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Short Course Description: This workshop is designed to actively engage participants in sharpening their mind sets, skill sets, and tool sets for affecting powerful and sustainable safety culture change within their organizations. In addition to working safety challenges specific to each participant’s organization, the session will also consider the idea of how powerful it could be if all dredging and marine construction companies joined us in raising the bar on safety.

Following this workshop, participants will be able to:

  1. Run a simple gap analysis on a safety concern specific to their work, including identifying stakeholders and potential root causes that are contributing to the gap and how they could contribute to safety solutions.
  2. Quantify potential costs of injuries vs. safety investments.
  3. Experiment with best safety practices learned from others in the dredging and marine construction industry.
  4. Identify safety changes that Hile Group has used to help drive improvements in numerous clients’ safety cultures and operational results, aka “The Big Hug and The Bottom Line.”


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