This webinar will provide practical guidance on the selection of soil shear strength parameters for static slope stability analysis. Topics covered include: stress-strain behaviors of cohesionless and cohesive soils and their relationships to strength selection; drained and undrained strengths and their application in stability analysis; the differences between effective stress and total stress analysis methods; loading cases for stability ana...

This webinar will present the results of 2D and 3D numerical evaluations of seepage conditions around a developing piping defect. An updated model similar to the first 3D numerical model performed at the University of Florida beginning in about 1980 (Townsend, 1981) will be presented to illustrate the importance of 3D influences on estimated seepage gradients, seepage flows and the evaluation of potential internal erosion potential failure mod...

As dams deteriorate, or as their purpose and benefits diminish, there may come a time when the appropriate action is to decommission the dam. For some dams, this can be a very simple, rapid and inexpensive undertaking. For other dams, it can be a very complex and costly process, requiring years to accomplish. The purpose of this webinar is to provide an overview of recent trends in dam decommissioning in the United States with an emphasis on t...

Hydrologic hazard curves are critical flood loading inputs for dam and levee safety risk assessments. Over the past decade, some Federal agencies have developed and applied new tools and data sets to estimate hydrologic hazard curves, which are graphs of peak flows, volume, or reservoir stages versus Annual Exceedance Probability (AEP). Hydrologic hazard curves provide a full probability distribution for the flood hazard, covering the range of...

The webinar consist of two sessions. Session 1 will be an overview of Geophysical methods applicable to dams and levees, how theory behind the methodologies, and the strengths and limitations of each method. This session will also cover what additional investigations, such as drilling, are necessary to calibrate the geophysical data in order to provide a holistic evaluation of the subsurface conditions and how these conditions can affect dam a...

Cracks are likely to develop in most embankment dams and levees, and not just in those that are poorly constructed. This course will present some of the common conditions that can lead to adverse geostatic stress conditions, cracking, and hydraulic fracturing in embankments. Case histories are used to illustrate various crack-forming mechanisms and potential failure modes associated with embankment cracking. The need for caution when consideri...

Low-level conduits (pipes) through the base of a dam are the most common spillway for small earthen embankment structures. However, the discontinuity caused by the presence of the conduit creates numerous issues that must be addressed during the design and construction of the low-level pipe. This short course will present general design and construction related issues that dam engineers and owners should be aware of when considering a low-leve...

Join DLT and CADLearning for a educational webinar and find out how you can build a better learning experience! As Autodesk software gets more sophisticated and purchasing models change, users are getting access to new features as they become available and experiencing more seamless interoperability between products. Keeping pace with these changes isn’t always easy, especially when you are striving for continuity and getting projects co...

With networking one of the biggest bottlenecks to cloud adoption, this month’s DC Microsoft Azure Government Meetup will focus on Hybrid Cloud With ExpressRoute which provides a high-performance, private, and secure connection between your IT environment and Microsoft Azure. We are fortunate to have James Walters, director of Azure EcoSystem Networking for Microsoft Azure Government in town from Redmond, WA, along with Greg Adgate, VP Gl...

VMware NSX is the network virtualization platform for the Software Defined Data Center (SDDC). VMware NSX enables organizations to divide the data center into distinct security segments logically, down to the level of the individual workload - irrespective of the workload’s network subnet or VLAN. IT teams can then define security policies and controls for each workload based on dynamic security groups, which ensures immediate responses...