Hydraulic and hydrodynamic modeling serves as a powerful tool for predicting the behavior of our most complex natural systems. These models harness cutting-edge computational technology to solve real-world problems related to our lakes, rivers, and coastlines, including contaminant transport, environmental restoration, and infrastructure design. Whether you’re designing stormwater solutions, tackling channel restoration, or forecasting the impact of extreme weather, modeling offers critical insights to guide decision-making and design. Let’s explore what modeling is, why it’s essential, and how it’s used to address today’s pressing environmental and engineering needs.
What Is Modeling?
At its core, hydraulic and hydrodynamic modeling harnesses computational tools to assess behavior of natural and manufactured aquatic systems under various conditions. By combining real-world data, proposed designs, and statistical projections, these models create a virtual representation of water flow and its interactions with the environment.
These inputs are knitted together to create hydraulic models that can be used to explain past events or anticipate future outcomes, such as flood events, channel migration and erosion, and sediment and contaminant transport.
Practical Uses for Modeling
Hydraulic and hydrodynamic modeling isn’t just theoretical—it plays a crucial role in solving real-world problems. Here are some ways it’s applied:
1. Predicting Flood Risks During Extreme Weather
When severe weather strikes, preparation is key. Hydraulic modeling helps predict the extent of flooding, empowering governments, businesses, and communities to plan, insure, and improve disaster readiness. For example, Federal Emergency Management Agency’s (FEMA’s) National Flood Insurance Program relies on these predictions to inform building codes, insurance rates, municipal zoning, and disaster preparedness. Understanding flood risks allows decision-makers to prevent damage and price insurance policies based on data, not guesswork.
2. Bridge Erosion and Scour Analysis
Did you know that one of the most common causes of bridge collapse is the scour (erosion) of piers and abutments during extreme events? Hydrodynamic modeling predicts the field of flow around in-channel structures during high-recurrence events. This allows engineers to estimate the depth of erosion that may occur, ensuring safe and resilient bridge designs.
3. Sediment and Contaminant Transport
Fate and transport modeling plays a pivotal role in environmental protection and remediation. The practice predicts how material, such as contaminated sediment or microplastic material, is transported and deposited across aquatic systems and helps identify where these materials may be deposited. These studies can help pinpoint future remedial actions or identify data gaps for further study.
4. Channel Design and River Restoration
As part of remediation and restoration activities, riverways impacted by site construction activities often must be restored to a naturalized and stable bank condition, to improve or restore habitat function while maintaining remedy or infrastructure protectiveness. Hydraulic modeling is one of the tools in the river restoration toolbox and can be used to support the design of channels that
- Mimic natural, pre-development conditions;
- Improve habitats for aquatic ecosystems; and
- Enhance flood protection for surrounding communities.
The goal? Sustainable waterways that serve both people and nature.
The EHS Support Advantage
At EHS Support, we specialize in assessing complicated aquatic environments to support actionable, real-world solutions. With decades of engineering expertise, our team tackles everything from remediation to stormwater management and aquatic system design. Looking for support with hydraulic modeling or water system projects? Reach out to Craig Drennan today to learn more about how we can help streamline your most complex water challenges into practical solutions.
Craig Drennan
Water Resources Engineer, PE
412-709-9051
Craig.Drennan@ehs-support.com
