intro story Lake


Lakes and reservoirs are important resources for communities around the globe. They provide food, drinking and irrigation water and can also offer spots for recreation. Under certain conditions lakes can also represent a threat for local communities, such as flooding or limnic eruptions. The ecological state of shallow lakes may be hampered by suspended sediments due to wind driven currents and waves. In deep lakes, stratification can cause undesirable anoxic conditions in the deeper areas. Understanding these systems is crucial to enable a sound management of these water bodies.

Delft3D is the state-of-the-art modelling framework for hydrodynamics, water quality, ecology, waves and morphology.
Here, in this space, we share knowledge & experiences, and discuss issues related to modelling of lakes.






Sub groups
D-Flow Flexible Mesh
Cohesive sediments & muddy systems


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Confusion about particle tracking

Jia Zeyu, modified 1 Year ago.

Confusion about particle tracking

Youngling Posts: 1 Join Date: 8/25/19 Recent Posts
I want to model the retention time of particles released in the inlet of a lake, i set up a simple example as shown below, but the particles seems to get together in the outlet, instead of leaving the lake. The flow in the inlet and outlet is flow rate. I test the difference between Operation and Open Boundaries outlet in D-FLOW, if I choose Operation and set a negative value to extract water, the particles will stay in the calculation. But when using Open Boundaries, the particles will be taken out of the calculation. If I can only use Open Boundaries in D-FLOW?