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


Message Boards

flow direction

farshad heidarnezhad, modified 1 Year ago.

flow direction

Youngling Posts: 13 Join Date: 5/20/18 Recent Posts
Hi everyone
I'm using delft3D for my thesis, lately I've had a problem about not knowing how to put the topographic elevation in the software. That's why it's reversed in the flow direction model. In my model, the direction of flow must be from the river to the lagoon, because the river elevation is higher than the lagoon elevation. However, I do not know how can I input the elevation of the river or lagoon in the software. I was wondering if anyone can explain a little bit about the setting of the software, especially about the entering inputs such as the elevation of lagoon and river.
In reality, the flow direction is from river to lagoon based on the available data, because the bed level (the elevation from free surface) of river is higher than the bed level of the lagoon. However, in my model, this direction is from lagoon to river which is not correct.
The files are attached below.
Thank you for your help.
Cournoyer Patrick, modified 1 Year ago.

RE: flow direction

Youngling Posts: 1 Join Date: 3/3/20 Recent Posts
check all the attachment, thanks for the flow. mykfcexperience
Yongjun Fang, modified 9 Months ago.

RE: flow direction

Youngling Posts: 1 Join Date: 1/14/20 Recent Posts
I have the same question with you. Have you solved yet and share with me. I don't know the flow direction of my grid. I want to know if I can set the the flow direction in grid.