Issue with bedrock depth and GW level simulation

[Himmat Basnet]

Hi all and Dr Seonggyu,

I am trying to develop SWAT-MODFLOW model using QSWATMOD2 for my watershed in San Antonio. I created a SWAT model and used it to create SWAT-MODFLOW model. I also created MODFLOW model from QSWATMOD and I had hk, sy and bedrock raster file but after I ran the SWAT-MODFLOW model, the GW head output was looking weird, so I tried to see how bedrock affects the GW head outcome by trying relative 300 and 400m depth to bedrock option, keeping other parameters same.

When I add depth to water from surface and GW head elevation output, my understanding is it should be equal to depth to bedrock. However, in both cases, it does not add up, and I am not sure if it should be that way or there is some issue. Also, my GW elevation and depth to water output in some cases does not seem to be following the same pattern but I think they should be showing same time series pattern as they are relative to each other.

I have attached the SWAT model I used and also SWAT-MODFLOW folder for both case with MDOFLOW model in each for the review and debugging. I hope to get response about it soon as it is essential for my thesis. Thank you and please let me know if further detail is needed.

Sincerely,

Himmat Basnet

300M SWAT-MODFLOW

SWAT MODEL

400M SWAT-MODFLOW