Seequent Solutions for Dam Modeling and Monitoring

This webinar covers:
• Seequent company overview
• Dam project case study using Seequent solutions
• Demonstration in Leapfrog of the dam project
• Sharing results with Seequent Central

Overview

Video Transcript

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(gentle piano music)

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<v Mikayla>Hello everyone, and welcome to today’s webinar:</v>

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Sequent Solutions for Dam Modeling and Monitoring.

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I would now like to introduce Gary Johnson,

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Sequent Customer Solutions Specialist,

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and your main technical support resource.

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Gary is located in our office in Broomfield, Colorado,

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and has a geology background.

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<v Gary>Thank you, Mikayla!</v>

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For today’s webinar, I will first be giving you

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a company overview of Sequent,

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I will then be going through a PowerPoint presentation

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on Sequent solutions for dam projects.

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I will then jump in and pretty much show you

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everything that I went over in the PowerPoint

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within Leapfrog, giving you a live demo,

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and then I’ll end by sharing my results

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with Sequent Central,

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our model management and collaboration solution.

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At Sequent, our vision is to enable better decisions

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about the earth, environment and energy challenges.

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To give you a little bit of background

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on Sequent’s company timeline,

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I always find this very interesting,

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is that Sequent actually originated as ARANZ,

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or the Applied Research Association of New Zealand,

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and we started with laser scanning technology,

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which was used in “Lord of the Rings”.

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We then applied that laser scanning technology

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and the code base behind it

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to start generating 3D geologic modeling solutions.

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These 3D geologic modeling solutions

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were used mostly in the mining industry

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and in 2004, ARANZ Geo launched Leapfrog Mining.

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Leapfrog Mining was then transitioned into Leapfrog Geo,

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and in 2018 we acquired Geosoft,

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and in 2019 we acquired GeoSlope.

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So we are continuing to develop our solutions

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and evolve the process,

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from analysis to modeling, and everything in between.

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Now, Sequent has an entire product portfolio

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and you might be familiar

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with one or two of these solutions,

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but I think it’s important to note

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that these all fall under the Sequent umbrella.

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In this specific webinar,

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we’ll actually be showcasing Oasis Montage,

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which is a geo soft solution,

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Sequent Central and to Leapfrog

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and also Slope/W, which is a geo studio solution.

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So we’ll be kind of bridging the gap

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between the product portfolio

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while demonstrating solutions

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for dam monitoring and modeling.

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We’ll first start up

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by opening up the project within Sequent Central.

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By publishing projects in Central,

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our cloud-based model management solution,

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you can maintain a clear, auditable, secure,

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and organized project history.

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Now, this can be great if you were working remotely,

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it enhances teamwork and collaboration

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while giving transparency through the project’s history.

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It also allows you to maintain a digital twin in time,

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which is very important for auditability process purposes.

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Here, you can see an example of a project history

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within Sequent Central.

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What is Leapfrog?

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So Leapfrog is an implicit 3D geological modeling solution

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that is based on workflows

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that allows you to quickly build models

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from various different input sources.

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Important thing to mention

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is that Leapfrog is implicit by nature,

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and it’s also dynamic,

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which allows you to quickly update models

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based on new information that you have gained,

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whether this is new drilling information

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and/or your actual input that can be applied to the model.

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It is very easy to update and change the model through time.

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For this case study, we will be using an earthen dam.

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Here you can see an image of the earthen dam

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that was actually rendered within Leapfrog.

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This dam has a complex subsurface structure

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and a few challenges involved,

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that we use Leapfrog, Oasis Montage, and geo studio,

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specifically Slope/W,

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to both model and monitor the dam.

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One of the huge advantages of using Leapfrog

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in your modeling life cycle

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and in the process of actually monitoring and modeling a dam

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is the ability to create fast and dynamic cross-sections.

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By dynamic,

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we mean that these sections will automatically be updated

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within Leapfrog

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if you make any changes to the model themselves.

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If you have an existing geologic model in Leapfrog,

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these cross-sections can be created

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within a matter of seconds.

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And so this kind of rapidly speed up the process

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while these sections might have historically been hand drawn

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in the CAD environment, for example,

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which might take hours to weeks

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to actually go in and create,

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we can create these very rapidly from an existing model.

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These are also dynamically linked,

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so any updates to the model in the Leapfrog modeling suite

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will automatically be reflected in the cross-sections,

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which can be a huge time-saving step.

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These sections can then be imported

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into the geo studio environment

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for geotechnical analysis.

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On the left here,

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you can see an imported section

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that actually was created in Leapfrog.

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When these are imported into geo studio,

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they actually retain the material colors and the boundaries,

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which can be a huge facilitator.

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And after you have actually run your geo-technical analysis,

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these can be imported back into Leapfrog,

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as you can see on the right,

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and this can be very beneficial

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to maintain all of your data in a single space

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while also visualizing your slope or seat analysis

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in the 3D environment.

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Now I know I’ve mentioned a few times

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that Leapfrog is dynamic,

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and so some of the benefits in dam monitoring

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can be the ability to monitor water level changes

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through time.

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Here you can see we have different color codes

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assigned to different weeks,

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allowing us to visualize water level changes through time.

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It’s also important to mention

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that these water level surfaces

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can be evaluated onto cross-sections

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and included in your exports to geo studio.

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Now, due to the sensitivity of structures, such as dams,

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direct investigations like four holes or drill holes

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are often not applicable and/or possible,

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and so very often geophysical studies are conducted.

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In this case study,

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we actually use an electrical resistivity campaign,

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and this specific image that you’re seeing on this slide

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is actually the electrical resistivity

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derived in Oasis Montage.

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Now these are 2D grids that were then exported

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from Oasis Montage, and then imported into Leapfrog.

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These 2D grids were imported into Leapfrog

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in the form of point cloud,

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and they were integrated

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with all of the data associated with the project.

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So not only do you maintain all of the data

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in a single environment,

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but it allows you to visualize different aspects of that

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together at once.

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So here we have the geologic model,

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we also have the electrical resistivity 2D grids,

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imported in Leapfrog,

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and for this specific example,

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these 2D grids, the geophysical survey,

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allowed us to identify a potential fault or fracture zone.

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And we actually were able to confirm this

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both at the site and by using geophysical surveys,

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such as the electrical resistivity campaign conducted here.

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Now, this is extremely important to understand

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at a site such as a dam,

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because this could be a potential zone of seepage,

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which is important to both monitor through time

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and to be able to model, to visualize and to communicate

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those challenges to everyone involved in the project.

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Now from the 2D grids,

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or the point clouds that were imported into Leapfrog,

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we’re actually able to generate a 3D numeric model

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of the resistivity values.

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Now, I really liked this quote,

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and I think it’s always important to mention

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that there’s nothing more heterogeneous

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than a homogeneous soil.

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And this is always important to take into consideration

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when you’re doing any type of dam monitoring.

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Now at the end of the project’s life cycle,

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this often comes time for reporting.

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One of the very useful reporting tools

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that we have in Leapfrog

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is the ability to make dynamic section layouts.

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These can be exported as a PDF and included in reports.

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Now these section layouts that are within Leapfrog

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are dynamic in nature, as well,

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so any changes to the model themselves,

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any new data that you do collect,

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will automatically be reflected and updated

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in the section layouts too.

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This can be a huge time saving step

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where you might’ve been hand drawing sections previously,

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using a multitude of different programs,

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this can all be done within the Leapfrog modeling suite.

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So now I will jump into the Leapfrog modeling suite

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to actually go through a live demo

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and show you some of the images that we have shown you here

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within the actual software.

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So now we’ve opened up Leapfrog Works,

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and we have the dam project

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that we were just visualizing in the PowerPoint,

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here in the 3D scene.

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For those of you who might be new to Leapfrog,

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just a brief rundown of the user interface.

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We have the project tree here on the left,

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which is designed in a top-down approach,

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which is meant to match your workflow,

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as Leapfrog is a workflow orientated solution.

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We also then have the 3D scene here in the middle,

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where you can interact with objects in 3D,

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and you can just drag and drop things

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from the project tree into the scene.

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Now, everything that has been displayed in the scene

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is also then listed down here in the shape list.

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The shape list at the bottom

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contains your different visualization settings

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and is an important location for, for example,

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turning things on and off

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and/or determining how you want to visualize things

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in the 3D scene.

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Here, I have created a few different saved scenes,

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which act as bookmarks,

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which I will be running through

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for the purpose of this webinar.

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This is a great way to retain certain perspectives

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on different objects

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and/or to tell a story

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without having to bring multiple different objects

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into the scene.

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Now, one of the most important things

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that I’ve mentioned throughout this webinar so far

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is that Leapfrog is dynamic by nature.

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Meaning that any changes to the data used in the project

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will automatically be reflected throughout.

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For example, here we have a water level

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that is tied to some tensometer data,

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tensometer data can be points downhole,

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this can also be borehole intervals.

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In this case, if we collect a new tensometer data,

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whether this is in the dam itself or surrounding the dam,

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we can actually see,

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and the model would automatically reflect those changes.

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So the water level surface would automatically reprocess

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to demonstrate and to take into account

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the new data that we have added or collected.

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You can also imply, or apply, different times to this.

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So if you have different water level surfaces

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for different dates,

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this is a great way to just visualize

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how that is changing through time.

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We know that understanding water levels

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within an earthen dam structure

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is essential to monitoring the dam itself

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and any potential seepage.

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Leapfrog also allows you to obtain cross-sections

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in any direction that you would like.

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For example,

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I will demonstrate this by first rotating around the model,

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I will then grab the slicing tool up here at the top,

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which looks like a knife with a green line,

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and I’m going to cut right down the dam axis.

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I’ve now cut a cross-section right along the dam axis,

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but as I mentioned,

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you can take these in any direction that you would like.

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If I want to go horizontal to the dam,

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I can do that as well.

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And you can use these orientations

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to actually generate cross-sections,

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which I’ll demonstrate momentarily.

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Now we can also create numeric models

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and we’ve demonstrated in the PowerPoint

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that we have the geophysical survey,

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but here we have some CPTU data

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that was conducted on the dam beach.

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And I know I mentioned

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that there’s nothing more heterogeneous

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than a homogeneous soil,

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and this is a great time to actually go in and monitor that.

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So I’ll go in and cut another slice

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just to demonstrate the different soil properties

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in the tailings beach.

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And here we can see

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that we have created a domain numeric model,

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specifically in the tailings beach.

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This demonstrates very clearly

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that this soil is heterogeneous.

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And while the assumption can be made,

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or has probably been made when this was placed here,

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that this was homogeneous, this is not the case.

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And this is very important to understand

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for potential seepage purposes.

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Now in addition to the domain CPTU tests

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that we have created here,

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we also have conducted an electrical resistivity campaign

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at this project site.

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Here we can see that we have all of our data in one space,

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we have the electrical resistivity, 2D grids,

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as well as our geologic model.

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And we’ve also actually gone in and created a fault,

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which, this fault was actually created

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using knowledge we had gained from both onsite observations,

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as well as the geo physical survey that was conducted.

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Now, if I click on this fault structure,

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I could turn that off real quick,

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and we can see that there is a very clear

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fault or fracture zone indicated on the geophysical survey,

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which is essential to understanding potential seepage issues

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at this dam site.

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Now from the 2D grids that we have collected

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at this case study,

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we can actually create a 3D model

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of the numeric data within Leapfrog.

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So this 3D model that we were now seeing here

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was collected directly from the numeric data

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that was imported into Leapfrog from Oasis Montage.

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Now there’s a variety of different applications

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for numeric models in Leapfrog,

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whether this is a permeability model,

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in this case, an electrical resistivity model,

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but there’s a lot that you can do with these in Leapfrog,

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such as evaluating these onto cross-sections

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and/or determining actual volumes of material

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that might be over or under a certain interval.

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Now, one of the areas where we can save you the most time

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in your dam monitoring and modeling workflow

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is by creating very quick and rapid dynamic cross-sections

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within Leapfrog.

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So here I have a saved scene with the geologic model

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and the slicing tool applied,

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and I’m going to show you

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how quick we can make a cross-section within Leapfrog.

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Now, everything in Leapfrog,

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all of the edits are done within the project tree.

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Everything that can be created can be done

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by just right-clicking on a folder in Leapfrog,

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so for example,

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here we’re going to be making a cross-section,

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so I’ll want to right-click

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on the “Cross-sections and Contours” folder,

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and for this example, I’ll be making a new cross-section.

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Now you can see on the section that we have an F and a B,

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and this actually corresponds to the Front and the Back

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of the section.

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So right now I have the F facing me,

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this will be the front of the section, and that is correct.

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Now if you ever had the B facing you

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and you wanted that to be the front,

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you can just choose to swap the front.

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This looks good as is,

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and I’m going to name this “Webinar Section”,

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and I’m going to go ahead and press okay.

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Now if I clear the scene

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and bring the webinar section into the scene,

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we just have the geometry of that section created.

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Now we actually want to go in

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and evaluate our model onto that.

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So I’m going to right-click on Webinar Section

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and choose Evaluations.

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And I’m going to choose the dam structure geologic model

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that we have created,

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and I’m going to go ahead and press okay.

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Now the model has evaluated onto the cross-section

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and using the display tools in the dropdown options,

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we can actually apply the model structure to that.

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So in a matter of seconds,

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we have now created a cross-section

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from the existing geologic model.

[00:20:12.960]
This section can, of course, be exported,

[00:20:17.780]
and if we right-click on the cross-section

[00:20:20.640]
down at the bottom here,

[00:20:21.550]
we can choose to export this

[00:20:24.090]
in a variety of very common export formats,

[00:20:27.250]
such as a DXF, a DWG or a DGM.

[00:20:32.520]
Now if you were going to be running slope stability,

[00:20:35.790]
or seep analysis on the section,

[00:20:39.250]
you can choose to do 2D analysis

[00:20:41.940]
and flatten the section to 2D.

[00:20:46.690]
Now these can then be brought into

[00:20:48.950]
a multitude of different programs,

[00:20:51.020]
specifically, in this case,

[00:20:52.170]
we brought this section into geo studio, in Slope/W,

[00:20:56.370]
to run a slope stability analysis.

[00:21:00.260]
You can also choose to evaluate surfaces onto the section,

[00:21:06.140]
for example,

[00:21:06.973]
you might want to evaluate a water level surface

[00:21:09.580]
onto this section as well.

[00:21:13.430]
Now after that had been exported to Slope/W

[00:21:17.300]
and the geo-technical analysis was conducted,

[00:21:20.520]
that can also then be re-imported

[00:21:22.640]
back into the cross-sections and contours folder

[00:21:25.810]
by right-clicking

[00:21:27.290]
and importing a new cross-section from image.

[00:21:32.040]
Here we have imported that section back in

[00:21:34.740]
after running the analysis, which you can see here,

[00:21:38.270]
and we have combined this in the Leapfrog 3D scene

[00:21:41.230]
with the geologic model.

[00:21:45.510]
And this is essential to show

[00:21:47.200]
that you can then bring everything back into the same space

[00:21:50.880]
to not only analyze your geologic model,

[00:21:53.920]
but also the slope stability analysis

[00:21:55.970]
that you have run in the 3D environment.

[00:22:00.830]
By bringing in the slope stability analysis,

[00:22:04.770]
we have completed the workflow.

[00:22:08.370]
We can now see everything

[00:22:09.870]
in the Leapfrog modeling environment

[00:22:12.950]
from geophysical data and a numeric model

[00:22:16.440]
to a geologic model, cross-sections,

[00:22:20.120]
and then our geo-technical analysis

[00:22:22.190]
that has then been applied to those cross-sections.

[00:22:26.800]
Now, how do you communicate the challenges or the risks

[00:22:31.610]
involved with monitoring and modeling a dam?

[00:22:35.550]
For that, of course, you can export cross-sections

[00:22:38.340]
from Leapfrog in common format, such as a PDF,

[00:22:41.110]
which can be included on a report,

[00:22:43.520]
but we have also created Sequent Central,

[00:22:47.420]
which is our cloud-based model management

[00:22:49.860]
and collaboration solution,

[00:22:51.840]
which allows me to share work in 3D

[00:22:54.780]
with colleagues, clients, and stakeholders,

[00:22:58.510]
as well as it allows you to create conversations

[00:23:03.030]
and to communicate risks involved in 3D.

[00:23:07.260]
So I will now jump into our Central browser.

[00:23:16.240]
The Central browser allows you to see the objects in 3D,

[00:23:21.400]
it allows you to interact with them as well,

[00:23:25.160]
but you don’t actually have the ability

[00:23:27.140]
to go in and edit anything.

[00:23:28.460]
So this is a great way to share your work with stakeholders

[00:23:32.166]
and/or project managers,

[00:23:34.420]
and to keep others involved in the project,

[00:23:36.820]
though they might not actually be involved

[00:23:38.920]
in the 3D modeling process.

[00:23:42.750]
Now on the right here,

[00:23:43.750]
you can see that I’ve created annotations,

[00:23:46.840]
anyone who is also on the Central server,

[00:23:50.310]
who you have added to it

[00:23:51.920]
and given them permission to this project

[00:23:54.150]
can also add or reply directly to comments

[00:23:58.100]
that you have created.

[00:23:59.940]
Now, something cool that I’ve done here

[00:24:01.460]
is that I’ve also created geotags

[00:24:04.430]
so that you can tell a story

[00:24:06.650]
and focus the conversation on a single location.

[00:24:10.480]
So these geotags

[00:24:11.880]
will actually bring you directly to that perspective.

[00:24:14.120]
If I click on one of the comments,

[00:24:20.120]
it’ll take me directly to the location

[00:24:21.970]
where I first saved that comment and made some annotations.

[00:24:26.280]
This is a great way to communicate challenges

[00:24:29.330]
and/or identify potential areas of interest

[00:24:32.210]
within your project,

[00:24:34.360]
while also maintaining a clear auditable history

[00:24:38.150]
of that project.

[00:24:39.970]
Now, this is essential for dam monitoring

[00:24:43.770]
because we all know the risks involved

[00:24:46.070]
in creating a dam of any type,

[00:24:48.680]
whether this is a tailings dam

[00:24:50.360]
for the mining and mineral industry,

[00:24:52.200]
and/or a dam for water resources,

[00:24:54.660]
which is supplying water to individuals, such as myself.

[00:25:00.950]
Dam failure can be catastrophic

[00:25:03.580]
and ensuring dam safety is one of the most important things,

[00:25:08.430]
if not by far the most important

[00:25:11.040]
in a dam projects life cycle,

[00:25:13.070]
everything from design phase to the actual monitoring phase

[00:25:17.540]
after the dam has been constructed.

[00:25:22.551]
<v Mikayla>Thank you Gary,</v>

[00:25:23.384]
and thank you everyone for attending today’s webinar.

[00:25:26.900]
If you have any other questions,

[00:25:28.610]
please contact our technical support team

[00:25:30.640]
at [email protected]

[00:25:34.690]
On behalf of Sequent,

[00:25:36.010]
thank you for joining us and have a great rest of your day.