I'm no rice model expert (it's been about 10 years since I ran the rice
model regularly) but I'm guessing that you have to set a bund height (code
IR009) on or before the date of irrigation.  In your case I'd guess the
model doesn't know how much water to hold on the surface so that everything
either runs off or goes into the soil.

Looking at one of the examples that comes with DSSAT I see that they also
adjust the percolation rate (code IR008) which I assume reduces the amount
of water that "leaks" into the soil.

Brian

At 12:10 AM 10/30/2001 +0700, you wrote:
>Dear sir
>
>This is the .RIX file
>
>Bipin Pathak
>
>
>
>*IRRIGATION AND WATER MANAGEMENT
>@I  EFIR  IDEP  ITHR  IEPT  IOFF  IAME  IAMT
>  1  0.70    15   -99   -99 GS006 IR003   -99
>@I IDATE  IROP IRVAL  IIRV
>  1 01225 IR003    50     0
>  1 01267 IR003    40     6
>  1 01279 IR003    50     7
>  1 01310 IR003    30     0