Conditions determining type flux across the soil surface

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hydrogal
Posts: 2
Joined: Fri Nov 02, 2018 4:54 pm
Location: Canada

Conditions determining type flux across the soil surface

Post by hydrogal » Fri Nov 02, 2018 7:10 pm

Hi,

I saw in the manual that infiltration occurs as either a prescribed head or prescribed flux condition, depending on these two equations (2.72 ans 2.73 in the manual)

|-K (dh/dx) -K | <= E
ha <= h <= hs

Where ha and hs are the min and max head at the soil profile, respectively and E is the max potential rate of infiltration. However, I am still confused about when each condition would be implemented according to these conditions.

I am looking for further explanation of this than what I have seen in the manual, or if there is a section about this I may have missed?

Thanks.

Jirka
Posts: 4801
Joined: Sat Mar 16, 2002 3:47 pm
Location: USA
Location: Riverside, CA

Re: Conditions determining type flux across the soil surface

Post by Jirka » Fri Nov 02, 2018 7:32 pm

The lower limit, ha, is applied during evaporation and the upper limit, hs, during infiltration.

Check out our newest posting at: https://www.pc-progress.com/en/Default. ... filtration. Here we post examples demonstrating the use of HYDRUS-1D to simulate infiltration from ponding and rainfall and issues associated with this process.

J.

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