I suggest you Rawls and Brakensiek's formulae

F López Unzu
----- Original Message -----
From: nata raaj
To: hydforum@yahoogroups.com ; hydrologymodel@... ;
rhydrology@yahoogroups.com
Sent: Monday, October 25, 2004 10:22 AM
Subject: [hydrologymodel] Regarding HYDRUS 2D model


Dear Members

I am working with HYDRUS 2D modelling software to understand the movement of
agrochemicals in the unsaturated zone and into groundwater. I have carried out a
detailed field study in a paddy field. Soil core samples were collected and
analysed for major ions and nutrients. Additionally, I have soil moisture and
organic carbon data for soil samples.

My quiry is

1) How to calculate the "qr = residual water content, qs = saturated water
content and soil water potential (Ys) or pressure head from soil moisture value?

Can anyone help me?

Thanks in advance.

Yours sincerely
N.Rajmohan



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