Dear Dharam,
Following words are Upendra's answer I got before:
IIRV indicates whether different irrigation for flooded/bunded rice
field
6 = single irrigation amount based IR006 value in mm (equivalent of
field schedule)
7 = model will irrigate at least on a daily basis to a specified depth
(indicated by IR006 amount) - automatic irrig
8 = model may irrigate more than once per day (e.g. in a highly
percolating soil)
It is more practical to use IR006 (floodwater depth) - let the model
then
determine the actual amount applied.
Hope this helps.
Upendra
------------------------------
J. L. Kang
----- Original Message -----
From: "Dharam Dabas" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, December 19, 2002 3:02 PM
Subject: Re: Irrigation management code in irrigation layer data in DSSAT.
> Dear friends,
>
> My thank to Saseendaran for his response. I restate my question
> on "irrigation Management, Code" once again for the shake of clarity
> and for correct response.
>
> In the X_Create in the menu "Management|Irrigation|Irrigation
> Information|Irrigation Dates|Irrigation Layer Data" there are following
> four fields:
>
> ----Field------- -Code-
> Appl. Date(DD/MM/YY) ---- IDATE
> Irr.Operation, Code ---- IROP
> Amount ---- IRVAL
> Irr. Management, Code ---- IIRV
>
> My query is
> (1) what does the " Irrigation Management, Code (IIRV)" means,
> (2) what are its codes and
> (3) how these affects the irrigation or water balance in the simulation?
>
> I could not get its values by the use of F2 key, or in the Codes Menu
> (Data|Background|Codes|experiment) or in the DSSAT manual. I hope
> people at ICASA are listening.
>
> The codes at p85, Vol.2 of DSSAT v3, manuals as given by Saseendaran
> are for the field "Irr. Operation, Code" and not for the field "Irr.
> Management, Code". My query was regarding the later field.
>
> With thanks and regards,
>
> Dharam Singh Dabas
> CCS Haryana Agricultural University,
> Hisar 125004 India
>
> ----- Original Message -----
> From: saseendran swaroopathil anapalli <[log in to unmask]>
> Date: Thursday, December 19, 2002 4:46 am
> Subject: Re: Irrigation management code in irrigation layer data in
> DSSAT.
>
> > Dear Dharam,
> > You should be getting the information you are looking for at
> > Vol.2 page 85 of DSSAT v3, manuals. I have copied the section below:
> >
> >
> > *Methods - Irrigation and Water Management (Units for associated data)
> > @CDE DESCRIPTION SO
> > IR001 Furrow, mm IB
> > IR002 Alternating furrows, mm IB
> > IR003 Flood, mm IB
> > IR004 Sprinkler, mm IB
> > IR005 Drip or trickle, mm IB
> > IR006 Flood depth, mm IB
> > IR007 Water table depth, mm IB
> > IR008 Percolation rate, mm day-1 IB
> > IR009 Bund height, mm IB
> >
> > Saseendran
> > Fort Collins, USA
> >
> >
> > >From: Dharam Dabas <[log in to unmask]>
> > >Reply-To: DSSAT - Crop Models and Applications
> > <[log in to unmask]>>To: [log in to unmask]
> > >Subject: Irrigation management code in irrigation layer data in
> > DSSAT.>Date: Wed, 18 Dec 2002 16:02:22 +0500
> > >
> > >Dear friends,
> > >
> > >I am creating file-x for simulation of rice growth in DSSAT.
> > >
> > >In <Management> <Irrigation> <Irrigation Information> <Irrigation
> > >Dates> <Irrigation Layer Data> there is a field for <Irr.(igation)
> > >Management Code>. The F2 key gives no code list for this field. There
> > >is no information on this field in the manual too. Can somebody
> > tell me
> > >what does it mean/ its codes and how these values affect the
> > simulation.>
> > >Thanks for kind cooperation.
> > >
> > >Dr Dharam Singh Dabas
> > >CCS Haryana Agricultural University,
> > >Hisar 125004 India
> >
> >
> > _________________________________________________________________
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