Inline drippers problem

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sanjay9376
Posts: 11
Joined: Thu Aug 13, 2009 10:34 am
Location: India

Inline drippers problem

Post by sanjay9376 » Sun Apr 11, 2010 5:17 am

Dear Sir,
I am using Hydrus 2D for my Ph. D. study. First time i am working in Hydrus 2D. Can you send me some examples on water and solute distribution under drip irrigation?
Thank you in advance

With regards
Sanjay

Jirka
Posts: 4712
Joined: Sat Mar 16, 2002 3:47 pm
Location: USA
Location: Riverside, CA

Post by Jirka » Sun Apr 11, 2010 1:18 pm

Sanjay,

You can find any examples in "The Public Library of HYDRUS Projects" here on HYDRUS website. You should be able to easily find them.

Jirka

sanjay9376
Posts: 11
Joined: Thu Aug 13, 2009 10:34 am
Location: India

Post by sanjay9376 » Sun Nov 21, 2010 5:03 am

Dear Sir,
I am not getting the research papers of Wesseling [1991] and Taylor and Ashcroft [1972]. Please send me the soft copy of the papers.
My email ID is "sanjay4471@gmail.com"
Thank you
Regards
Sanjay

Jirka
Posts: 4712
Joined: Sat Mar 16, 2002 3:47 pm
Location: USA
Location: Riverside, CA

Post by Jirka » Sun Nov 21, 2010 5:46 am

I do not have it. J.

sanjay9376
Posts: 11
Joined: Thu Aug 13, 2009 10:34 am
Location: India

Post by sanjay9376 » Wed Mar 09, 2011 7:30 am

Solute reaction parameters for each soil material:
Dear Sir,
I want to run the model for P, K and S distribution in the soil but sir which value we should give for Kd, Nu, Beta and Henry and other parameters under solute reaction parameters. Also tell me cBand1, cBand2 and cBand3 values. Please guide me in this regard.
Thank you in advance
Sanjay

Jirka
Posts: 4712
Joined: Sat Mar 16, 2002 3:47 pm
Location: USA
Location: Riverside, CA

Post by Jirka » Wed Mar 09, 2011 2:38 pm

I recommend that you look at the following paper:

Hanson, B. R., J. Šim?nek, and J. W. Hopmans, Numerical modeling of urea-ammonium-nitrate fertigation under microirrigation, Agricultural Water Management, 86, 102-113, 2006.

You can download from my webpage. We discuss there parameters for the nitrogen species and phosphorus.

Jirka

sanjay9376
Posts: 11
Joined: Thu Aug 13, 2009 10:34 am
Location: India

Post by sanjay9376 » Wed Mar 23, 2011 9:32 am

Dear Sir,
Thanks for your last reply, but still i could not find Kd value for Sulphur. Also I read the manual but I am not getting the value of cBand1, cBand2, cBand3, and cBand4

sanjay9376
Posts: 11
Joined: Thu Aug 13, 2009 10:34 am
Location: India

Post by sanjay9376 » Wed Mar 23, 2011 10:01 am

Sir,
One more query
In solute transport parameter, what should be the value for SinkL1, SinkS1 for phosphorus, potassium and sulphur
Kindly help me in this regard
Thank you

Jirka
Posts: 4712
Joined: Sat Mar 16, 2002 3:47 pm
Location: USA
Location: Riverside, CA

Post by Jirka » Wed Mar 23, 2011 10:49 am

You need to check this paper:
Hanson, B. R., J. Šim?nek, and J. W. Hopmans, Numerical modeling of urea-ammonium-nitrate fertigation under microirrigation, Agricultural Water Management, 86, 102-113, 2006.

I do not really know more than what's written there.

J.

sanjay9376
Posts: 11
Joined: Thu Aug 13, 2009 10:34 am
Location: India

Post by sanjay9376 » Tue Apr 12, 2011 7:51 am

Dear Friends
I am simulating the Phosphorus (P), potassium (K) and sulphur (S) movement in the soil under drip fertigation. I could able to run the model for potassium and phosphorus but I could not run the model for Sulphur movement. I got the Kd values for P and K from the paper suggested by Jirka but Kd values for sulphur are not mentioned in the literature which i come across. If anybody having the literature or Kd value for Sulphur then please tell me
Thank you

Sanjay
My email ID is sanjay4471@gmail.com

sanjay9376
Posts: 11
Joined: Thu Aug 13, 2009 10:34 am
Location: India

Post by sanjay9376 » Sat Apr 16, 2011 4:51 am

Dear Friends
I am simulating the Phosphorus (P), potassium (K) and sulphur (S) movement in the soil under drip fertigation. I could able to run the model for potassium and phosphorus but I could not run the model for Sulphur movement. I got the Kd values for P and K from the paper suggested by Jirka but Kd values for sulphur are not mentioned in the literature which i come across. If anybody having the literature or Kd value for Sulphur then please tell me
Thank you

Sanjay
My email ID is sanjay4471@gmail.com

Jirka
Posts: 4712
Joined: Sat Mar 16, 2002 3:47 pm
Location: USA
Location: Riverside, CA

Post by Jirka » Sat Apr 16, 2011 2:52 pm

Check out these reports:

Strenge, D. L., and S. R. Peterson. 1989. Chemical Data Bases for the Multimedia Environmental Pollutant Assessment System (MEPAS): Version 1. PNL-7145, Pacific Northwest Laboratory, Richland, Washington.

EPA, UNDERSTANDING VARIATION IN PARTITION COEFFICIENT, Kd, VALUES
Volume I: The Kd Model, Methods of Measurement, and Application of Chemical Reaction Codes August, Office of Radiation and Indoor Air
Office of Solid Waste and Emergency Response, U.S. Environmental Protection Agency, Washington, DC 20460, 212pp, 1999.
http://www.orau.org/ptp/PTP%20Library/l ... l/kdsa.pdf

J.

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