Source of ground infiltration values

Wouter

Hi all,

For a project I am looking into the ground infiltration values (in m/d) of different types of soils.

I was wondering where the default values in Tygron come from. I believe the source of subsurface data is the BRO, but I was not able to find the exact source of the values for ground infiltration. Does someone know this?

Thanks in advance!

Kind regards,

Wouter

vincent.rd

Hi @Wouter ,

From one of our devs:

These values are based on BOFEK Table and Staringreeks, see column KV-Soil.

We have updated the values once so far, but not the calculations.

Each value can be adjusted if the user wants to use other values.

See also:

https://www.wur.nl/nl/show/BOFEK2020WENR-rapport3056.htm

I hope this helps,

Regards,

Vincent

Wouter

Hi @vincent.rd,

Thank you for your reply.

I indeed noticed that the values were based on the BOFEK and Staringreeks, but I still have trouble with understanding some of the infiltration values that were given.

For instance, a "haarpodzolgrond, grof zand" has a different value than a "laarpodzolgrond, grof zand" in Tygron, while both are categorised with the same BOFEK-code and in my understanding should thus have the same Staringreeks infiltration value.

Would you be able to indicate where these discrepancies originate from?

Thanks in advance,

Regards,

Wouter

vincent.rd

https://community.tygron.com/forum/uploads/936/8NRVDW0HTQ4W.xlsx

Hi @Wouter ,

I attached an excel that we use internally. I forgot to attach it in the previous post. I understand it was created by a former colleague, who is a water specialist.

I hope this answers your question.

Regards,

Vincent

Wouter

Hi @vincent.rd,

Thank you, I believe this should be very helpful!

Regards,

Wouter

Wouter

Hi @vincent.rd,

Unfortunately, I still do not understand the default values for infiltration in Tygron. I checked the Excel-file you sent me and discovered that the values in that file are different from the ones in Tygron (LTS version).

For example, take the "Veldpodzolgrond, grof zand", which has a ground infiltration value of 0.205 m/d in Tygron:

In the Excel-file however, this soil type has an infiltration value of 1.84 m/d:

I noticed that a difference occurs for all soil types in my study area.

Do you or does someone else know why this difference exists?

Thanks in advance,

Wouter

vincent.tygron2

Hi @Wouter ,

It seems the file I sent you was outdated. please find here the most recent one.

https://community.tygron.com/forum/uploads/310/KND65H1E0WHW.xlsx

Hope this helps,

Vincent