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Interested in MIKE 21C?

<p><strong><span class="lead-1">Conduct advanced studies of river dynamics, focusing on sediment transport and morphology</span></strong></p>
<p> </p>
<p>MIKE 21 Curvilinear Flow Model (MIKE 21C) is powerful river morphology modelling software designed to transform complex river dynamics into comprehensive, actionable insights for teams and organizations. By integrating modules for hydrodynamics and sediment transport, this software ensures a holistic approach to river studies, supporting your decisions with accurate data on scour, deposition, and bank erosion.</p>
<p> </p>
<p>Perfect for river engineers, environmental consultants, and flood risk managers, MIKE 21C includes features designed to predict changes over various time scales. By also accommodating complex sediment mixes, MIKE 21C helps you design safer, more efficient waterways.</p>

Technologies

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<p>Designed for river morphology studies, MIKE 21C supports both hydrodynamics and sediment transport simulations to effectively model flow dynamics, helical flow, sediment transport, alluvial resistance, scour, deposition, bank erosion, and planform changes. Modules can run concurrently, incorporating changes in alluvial resistance, bed topography, and bank line geometry into hydrodynamics. <a rel="noopener" href="https://youtu.be/QFvFPLPX-dA?si=78wnKgQbC0kHSaBF" target="_blank" title="Watch video" data-anchor="?si=78wnKgQbC0kHSaBF">Watch video</a></p>
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<p>Create detailed representation of rivers and channels with the user-friendly MIKE 21C Grid Generator. This built-in tool allows you to resolve areas of special interest using a higher density of grid lines. You can also create and modify grids that contain important model bathymetry, bed resistance data, and more with MIKE 21C’s map-based interface.</p>

<p>With MIKE 21C, you’re not limited to just non-cohesive sediment transport modelling. Apply graded sediment descriptions by defining multiple sediment fractions. The sediment transport module offers highly customisation options for both individual and graded sediment studies. Graded sediment models are essential when the sediment size spectrum exceeds a single size class due to varying properties like contamination or densities.</p>

How does MIKE 21C help?

<h2 class="header-2"><strong>No in-house modellers?</strong></h2>
<p> </p>
<p><span class="lead-1">Get our expert modellers on board for your consulting projects either as a partner, to provide extended user support or for model and project reviews.</span></p>

<p>Enhance restoration efforts by modelling river and coastal sediment dynamics alongside vegetation.</p>

<p>Design erosion control measures using complex sediment and hydraulic models to protect landscapes and manage shoaling.</p>

<p>Analyse morphological changes in rivers and coasts by predicting changes in dynamic environments like braided rivers.</p>

<p>With the MIKE 21C Hydrodynamic (HD) module, you can calculate flow fields in response to a variety of forcing functions, such as prescribed water levels or flows at open model boundaries.</p>
<ul>
<li>Compute water levels and flow velocities on a curvilinear or rectangular grid covering the study area by solving the St. Venant equations</li>
<li>Perform long-term simulations with the highly efficient model solver</li>
<li>Model hydraulic structures with your choice of dynamic or quasi-steady solutions</li>
</ul>

<p>With MIKE 21C’s specialised Helical Flow module, you can accurately describe the time and space lag in the development of the helical flow to analyse bend scour, confluence scour and char build-up and migration. Helical flow develops in channel bends due to curved streamlines. While it generally does not have a strong influence on general flow patterns in rivers with large width/depth ratios, it can have a significant influence on sediment transport direction and hence morphological changes (e.g. sand bars).</p>

<p>With MIKE 21C’s comprehensive Sediment Transport (ST) module designed for sediment transport and river morphology dynamics, you can model:</p>
<ul>
<li>Helical flow, bank erosion, bed scour</li>
<li>Sediment transport for sand and gravel</li>
<li>Bed load with secondary flow effects</li>
<li>Suspended load with non-uniform concentration profile variation</li>
<li>Multiple sediment fractions using cohesive and non-cohesive sediment models</li>
<li>Individual sediment fractions for highly customisable parameterisation</li>
</ul>
<p>Single fraction sediment models suffice in cases where the standard deviation of the particle size distribution is sufficiently low. The classic case being a low land river with well mixed sand, and it involves using e.g. the median grain size.<br /><br />Graded sediment models are required for situations where the sediment cannot be described with one single size class. For such models, a number of discrete sizes are defined, which represent the known grain sizes involved in the considered problem. MIKE 21C supports up to 32 sediment fractions and up to 16 bed layers. Graded sediment models are far more complex than single fraction models, requiring:</p>
<ul>
<li>Sediment budget for each size class, e.g. distribute total sediment inflows to the fractions</li>
<li>Local distribution of size classes in the bed, can include vertical distribution in the bed</li>
<li>Sediment transport models can be defined individually for each size class</li>
</ul>

<p>With MIKE 21C, you can accurately calculate scour and deposition including the effect of supply-limited sediment layers. Simulate the downstream migration of fine material on a coarse riverbed or represent non-erodible (protected) riverbed areas in the modelling domain.</p>

<p>The Planform module<span> of MIKE 21C allows you to accurately represent lateral processes in morphological models. Calculate bank erosion for inclusion in the riverbed sediment budget or update the curvilinear grid to account for movement in the bank line. You can also reproduce the chaotic behaviour of a multi-channel river such as a braided river.</span></p>

<p>The Mud, Debris or Oil feature enables an alternative hydrodynamic solution in which a fluid dependent flow resistance is added to the standard flow momentum equations. This module can be used to study tailings dam breaks, flows with very high sediment concentrations and depth-integrated laminar flows, e.g. oil.<br /><br />The rheological properties of non-Newtonian fluid, e.g. Bingham, are driven by the complex interaction of a fluid’s chemical and material composition. Key composition properties include the particle size distribution (e.g. percent fines), solids concentration, water content, chemical composition, and mineralogy such as the presence of clay minerals. The Bingham rheological model is well suited for homogenous fluid mixtures with high concentrations of fine particles (e.g. mudflows, hyper-concentrations of fine sand, silt, and clay-size sediment) and other material types such as oils.</p>

<p>With MIKE 21C, you can continuously update the curvilinear grid during model simulation in accordance with simulated bank erosion, an important feature for long-term simulations of river bends. When accumulated bank erosion at a certain location is exceeded, the model updates the curvilinear grid and associated maps (bathymetry, sediment distributions etc.). Grids are only updated when erosion exceeds a specified fraction of the local cell width at the bank.</p>

<p>With MIKE 21C, each sediment fraction can have its own sediment transport modes and specified formulas. Cohesive sediment fractions are handled as suspended load with traditional erosion and deposition functions, while non-cohesive sediment fractions can have bed-load and suspended load set individually. Several non-cohesive sediment transport formulas are also available including: Engelund-Hansen, van Rijn, Engelund-Fredsøe, Meyer-Peter &amp; Müller, Smart-Jaeggi, Yang, Wilcock &amp; Crowe, Garcia &amp; Parker, Parker, Ackers &amp; White and Lane-Kalinske.</p>
<p>Bed-load is always considered in equilibrium and includes the effect of helical flow and bed slope.</p>
<p> </p>
<p>All suspended sediment transport, including cohesive and non-cohesive sediment fractions, are also uniquely handled with Advection-Dispersion (AD) equations. These are specific for each fraction due to the individual convective fluxes associated with helical flow and non-uniform concentration profiles, as well as specific dispersion coefficients. The AD equations are solved using an implicit scheme.</p>

<p>With MIKE 21C’s Quasi-Steady approach, you can conduct morphological simulations with time-varying boundary conditions covering several years or even decades. Benefit from a significant increase in computational speed where the hydrodynamics are considered quasi-steady, for example where flow fields only change due to morphological changes and/or due to slow changes in boundary conditions.<br /><br />Defining a boundary conforming curvilinear grid allows highly efficient use of the grid points to describe the channel, because the grid lines follow the bank lines, a 2D river model can easily cover a 150 km stretch.</p>

<p>Ease the task of data input, analysis and presentation of simulation results via an integrated work environment available through the standard MIKE 21 Pre- and Postprocessor tools embedded in MIKE 21C.</p>
<p>With the Curvilinear Discharge Calculation Tool, you can calculate the discharge of water or sediment through the model area at selected cross-sections.</p>
<p>With the built-in Result Viewer, you can display a number of result files of different format and from different modelling systems in the same plot provided all result files are geo-referenced according to the same coordinate system.</p>

<p>For morphological simulations, the use of animations to visualise results is highly important. MIKE 21C allows you to animate results on the screen using online control buttons for play, pause, play 1 step, rewind, go to end and more. In addition, video files can also be created.</p>

<p>MIKE 21C inputs and outputs are readily accessible by your own code in e.g. Matlab, Python, and C# using <a rel="noopener" href="/technologies/mikepoweredbydhi/mike-for-developers/" target="_blank" title="MIKE for Developers">MIKE SDK</a>. This capability allows for custom tool development to support the unique needs of your projects.</p>
<p> </p>
<p>MIKE SDK offers methods for reading and writing the binary result files from MIKE 21C, especially the dfs2 files which are often used when post-processing results. Code that reads the result dfs2 files and grids are easily written based on the examples under the SDK installation. Post-processing typically involves integration over areas or time, and calculation of derived results.</p>

<p>You can now access MIKE 21C on Azure Marketplace, where you can start modelling in the cloud with no hardware limitation in four simple steps.<span> </span><a rel="noopener" href="https://www.dhigroup.com/technologies/mikepoweredbydhi/pricing/mike-on-azure/" target="_blank" title="MIKE on Azure">Learn more</a></p>

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<p>Save time and improve your modelling workflows using MIKE Zero’s upgraded editors and viewers. Take advantage of new keyboard shortcuts and themes, improved tabbing, tear off and cascade functionality plus easier access to User Guides and Scientific Documentation.</p>
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Learn how your project can benefit from this long-term sediment transport and river morphology modelling software.

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ABM Lab

Simulate complex subsurface flow, mass, and heat transport processes.

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MIKE Cloud

Instantly access high-performance virtual computers to run complex simulations.


MIKE Cloud Execution

Investigate water quality concerns and their potential ecological impacts.

MIKE ECO Lab

Optimise river basin management with map-based modelling for integrated water resources management.

MIKE HYDRO Basin

Create high-quality 2D meshes in record time with this cloud application.


MIKE Mesh Builder

Build custom real-time systems for forecasting and operational control.

MIKE OPERATIONS

Analyse groundwater, surface water, recharge, and evapotranspiration processes.

MIKE SHE

Manage water systems with an integrated urban, river, and flood modelling platform.

MIKE+

Manage, configure, and present the results of your MIKE+ models.

MIKE+ Model Manager

Analyse river flows, assess hydrological changes, and estimate pollution transport.

MIKE 21 Curvilinear Flow Model

Interested in MIKE 21C?

Resources

How does MIKE 21C help?

No in-house modellers?

Areas of application

Ecological restoration projects

Erosion control measures

Sediment transport and morphology

Additional capabilities & unique features

Let's get started

Related technologies

ABM Lab

FEFLOW

Global Hydrological Model

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How can we help?

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If you prefer not to - no problem!
You can always reach us at info@dhigroup.com or +45 4516 9200.

MIKE 21 Curvilinear Flow Model

Interested in MIKE 21C?

Resources

How does MIKE 21C help?

No in-house modellers?

Areas of application

Ecological restoration projects

Erosion control measures

Sediment transport and morphology

Additional capabilities & unique features

Let's get started

Related technologies

ABM Lab

FEFLOW

Global Hydrological Model

You may also like

How can we help?

You need to accept Marketing cookies to submit this form.If you prefer not to - no problem!You can always reach us at info@dhigroup.com or +45 4516 9200.

You need to accept Marketing cookies to submit this form.
If you prefer not to - no problem!
You can always reach us at info@dhigroup.com or +45 4516 9200.