Management operations rewriting error

[Rana Ammar]

Dear SWAT Users 

I am using SWAT for recharge estimation in an area with agriculture as dominant land use. My study area has a mixed cropping rotation pattern. In my LULC map rotational crops are represented by the code AGI1 (Irrigated mixed cotton, wheat rotation) and similar other codes for other crops. However, based on my understanding,  I assigned AGRR (Agricultural land row crops) properties to AGI and did the same for other crops based on their relevance to SWAT recognizable codes. 

Now in setting up management operations, I used general code (AGI1) to represent 'plant/begin or growing season', while using individual crop specific data for both cotton and winter wheat and other operations such as tillage and irrigation (attachment 1). 

I have attempted following options to input crop related operations data in SWAT management operations module, 

1. Schedule by Heat Units with manual operations e.g. manual irrigation and manual fertilizer application etc.

2. Schedule by Heat Units with auto operations e.g. auto irrigation and auto fertilization etc.

3. Schedule by Date with manual operations e.g. manual irrigation and manual fertilizer application etc.

4. Schedule by Date with auto operations e.g. auto irrigation and auto fertilization etc.

For options 1 and 2 'rewrite SWAT input files' works good, however SWAT does not trigger irrigation application in required months (e.g., winter wheat requires first irrigation in December and last in March, while SWAT triggers irrigation events between Apr to July).

For options 3 and 4 'rewrite SWAT input files' gives error. For example for a subbasin (say subbasin 8) with HRUs (28 to 32) having AGI1 land use type, 'rewrite SWAT input files' doesn't work and software shows "“ Argument ‘Expression’ is not a valid value.:MGT file print error on Subbasin:8, HRU:28" error (attachment 2). Management files in 'input/output' folder also do not show operations detail (attachment 3). 

I have been struggling for last three weeks but can't find any solution. Please suggest the way out.

regards

Rana 

[Sonam Sandeep Dash]

Dear Rana,

Have you got the solution to your problem? i am also facing the same issue. Please tell me how to proceed further,

Thanks,