EFDC in China

EFDC in China Blog Paul Craig, DSI Chief Consultant, made a presentation looking at the development history of EFDC at the inaugural iSymWater conference

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In the News: Spencer Dam Failure

Early in the morning on March 14, 2019, the 92-year-old Spencer Dam located on the Niobrara River in Nebraska failed due to a combination of ice accumulation and high flows. The failure resulted in destructive flooding downstream, resulting in loss of life and property in an area where such events are extremely rare. Buildings and…

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In the News: Lake Michigan Freezes

BACK In the News: Algae Bloom off the Coast of Florida Blog https://www.youtube.com/watch?v=41LWVnpWr7A In case you are lucky enough to be missing the recent cold snap that has passed the US by, here is some “cool” time-lapse footage of the impact of wind and cold weather on Lake Michigan. Time-lapse photography of ice flow evolution…

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Ask The Experts: Sediment Transport Modeling

BACK Ask The Experts: Sediment Transport Modeling Blog For sediment transport modeling, EFDC requires a modeler to define particle size classes and specify the median diameter for each class, which can represent the average behavior of the particles.  A general approach to specify the median grain size for a modeling class i is where the…

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In the News: Algae Bloom off the Coast of Florida

BACK In the News: Algae Bloom off the Coast of Florida Remember the Red Tide/Algae Bloom crisis that gain wide attention during 2018? It has been the second long-lasting bloom since 2006, although it is not affecting as wide of an area for now, it can still be seen on several shorelines. One of the…

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In the News: Taylor Oil Spill in the Gulf of Mexico

BACK In the News: Taylor Oil Spill in the Gulf of Mexico Blog The United States is quickly becoming the world’s largest oil producer, a significant component of this increased production capacity is related to an expansion of offshore oil drilling. Offshore oil drilling has always been an environmentally risky process. The potential for catastrophic…

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Industrialization’s Effect on the Yellow Sea

BACK Industrialization’s Effect on the Yellow Sea Blog Morning on the Yellow Sea The Asian continent is home to many unique bodies of water that draw intrigue from tourists and travelers around the world. From the waters of the Caspian (the world’s largest landlocked body of water and premier global source of Beluga caviar) to…

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Lake Ontario Water Level

BACK Lake Ontario Water Level Blog What is causing high water levels on Lake Ontario? What does a completely encased ice house have in common with rising lake levels? They are both phenomenon happening at Lake Ontario, one of the five Great Lakes along the border between the United States and Canada. Lake Ontario, 14th…

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Han River Development

BACK Han River Development Blog There’s no doubt the waterways of Europe are tourist attractions in themselves, drawing millions to stroll the banks of the River Thames in London and the River Seine in Paris every year. Similarly, South Korea’s Han River serves as a centerpiece for the city of Seoul and its citizens, with…

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The History of Hydrodynamic Studies

BACK The History of Hydrodynamic Studies Blog This is the first in a three-part blog series that provides an introduction to hydrodynamic modeling, an overview of how models work, and, finally, an exploration of their many applications. Let’s start with the history of hydrodynamic studies. As you know, hydrodynamics studies the motion of fluids, particularly…

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EFDC+ vs. Other EFDC Versions

BACK EFDC+ vs. Other EFDC Versions Blog The Dynamic Solutions International (DSI) version of EFDC is called EFDC+ (formerly EFDC_DSI).  EFDC+ is one of the most used versions of the EFDC model available to the scientific and engineering community. This article compares the capabilities of EFDC+ to other widely used EFDC models. EFDC Model Versions…

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West Lake Fish Die-Off

BACK West Lake Fish Die-Off Blog Unprecedented Fish Die-Off Draws Attention to Water Quality in Vietnam’s West Lake This past weekend, a major fish die-off occurred in West Lake, the largest freshwater lake located in Vietnam’s capital of Hanoi. Although smaller fish die-offs are common, this event is reportedly to be of unprecedented seriousness. The…

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EFDC_Explorer and the Future of Hydropower

BACK EFDC_Explorer and the Future of Hydropower Blog What does the future of hydropower look like? The U.S. Department of Energy has the answer with its recently released forecast and roadmap for hydropower from the present to the year 2050. Among the findings, researchers foresee a hydropower environment in which generating capacity will grow from…

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Sigma-Zed Model in EFDC+

DSI has developed an improved version of the EFDC code to help deal with pressure gradient errors that occur in simulations that have steep changes in bed elevation. This new version of the code is called the Sigma-Zed code (EFDC_SGZ) and has been integrated into the EFDC+. Sigma-Zed contrasts with the conventional EFDC approach which applies a sigma coordinate transformation in the vertical direction and uses the same number of layers for all cells in the domain.

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