Lake Washington Real-Time Model
DSI recently developed a real-time model for Lake Washington, along with a public-access model portal…
JSON Formatted Files in EEMS
JSON (JavaScript Object Notation) is an increasingly common standard data format to store and transmit data objects that us…
Enhancements to the EEMS GUI
As we added new features to EFDC+, our Graphical User Interface (GUI), EFDC_Explorer (EE) has also changed to…
Modeling Interaction Between Phytoplankton and Zooplankton in EEMS
Zooplankton population modeling is a significant new feature in the recently released version of …
Transforming Node Time Series Model Result to EE Field File
There can be multiple reasons when a modeler needs to incorporate results from another model. It can be the lack of direct measurement of specific properties or…
Testing EFDC+ Propeller Wash Module with Sediment Transport Process
This post introduces a simple testing process to demonstrate how the propeller wash module works with EFDC+’s sediment transport process modeling features.
NetCDF-CF and UGRID Formats
The Network Common Data Form (NetCDF) data format was originally intended to create, access, and share array-oriented data in a form that is self-describing and portable…
Creating Great Animations in EEMS
Communicating your modeling results to a wide variety of audience is as important as developing a good model. Animating the processes is one of the most powerful ways in which a modeler…
Simulating Wind-Induced Waves in EEMS
Wind-induced waves affect the propagation of gravity waves. Wave modeling hindcast is a critical step for wave energy development and…
Propeller Wash
Cleanup of contaminated sediment sites may include dredging, capping, or in-situ treatment, or a combination of these three techniques. Long-term stability of sediments is key to the success of these remedial actions…
Propeller Wash
Cleanup of contaminated sediment sites may include dredging, capping, or in-situ treatment, or a combination of these three techniques. Long-term stability of sediments is key to the success of these remedial actions…
Simulating Biota in EFDC+
Water quality simulation in waterbodies involves the biochemical transformation of the nutrients, their movement through several water layers….
Velocity Profile of a Propeller moving through a Channel
In this post, we would like to demonstrate how the propeller transfers the energy to the water column causing sediment resuspension.
Propeller Wash Simulation Using Historical Ship Track Data
Simulation of the impacts of propeller wash in hydrodynamic and sediment transport models requires detailed information on ship travel routes and the physical characteristics of each ship.
The Importance of Propeller Wash Modeling
Many urban waterfronts are contaminated with metals, petroleum hydrocarbons, and other organic chemicals. The contamination could be as much as 20 feet…
Modeling Climate Change Impacts Using EE
Climate change is an accepted reality, so most infrastructure development and maintenance will require the evaluation of possible impacts of climate change.
Modeling Sediment Resuspension in a Coastal Environment Due to Ship Traffic
Sediment resuspension occurs in harbors across the world as a function of propeller-induced water velocities, and resulting shear stress, at the sediment-water interface. While such events occur with….
Simulation of Manatee Habitat with EEMS
The warm waters and shallow, vegetated waterways of the Gulf of Mexico provide valuable habitat to a diverse range of plants and animals….
Eutrophication Studies
The US EPA describes nutrient pollution as “one of America’s most widespread, costly and challenging environmental problems.” This issue is of significant concern world-wide, with considerable resources now being committed in Asia and Europe to study eutrophication in streams, rivers, lakes, bays and coastal waters and related economic, environmental and human health issues.
Total Maximum Daily Load Studies (TMDL)
The need for detailed plans describing the restoration of impaired waters is widely recognized in developed countries. TMDL studies outline the maximum amount of a pollutant a body of water can receive without violating water quality standards, and an allocation of that amount to the pollutant’s sources. Determining the Wasteload Allocation, the portion of a receiving water’s assimilative capacity that is allocated to one of its existing or future point sources of pollution, is often required in a TMDL study. Numerical modeling is an indispensable component of these studies.