Inundation area – drainage and infiltration

[Thor]

I’m working on a canal embankment breach study (see http://hec-ras-help.1091112.n5.nabble.com/Modeling-a-canal-embankment-breach-tp8490.html for additional information).

I’m wondering about the possibilities to model the outflow/discharge of water of a 2D area via a drainage system in the urban areas or infiltration in natural areas . It doesn’t need to be really accurate, I’m thinking about building in an average outflow per square metre/kilometre which is defined in a separate layer like the land use layer.

The information in the manual didn’t really help me, or I didn’t find the right part. Pointing in the right direction or some experiences by your side would be really appreciated.

[cameron]

The current version of HEC-RAS 5.0.7 cannot handle infiltration. Drainage systems can sort of be modeled, but not in a straight forward method and includes a lot of assumptions.

[Thor]

Hello cameron,

thank you for the hint! Do you know of any tutorial/documentation/blog post where modeling of a drainage system is covered or which would be the right keywords to search for it in the Hec-RAS world?

Cheers

[Author]

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