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Welcome to the QSWAT+ user discussion group.

Please note this group is for questions and discussion related to the QGIS interface, QSWAT+, not the model itself or the editor. For content related to those topics, please see:

For questions and discussions related to the 2012 version of SWAT and its interfaces, please see the SWAT website.

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Website: swat.tamu.edu/plus

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Matthew Lombardo, Nancy B. Sammons2

Oct 7

Error when running SWAT+ for the first time

Matthew: The HYDGRP column should a,b,c or d not b/d, etc. Nancy From: qswa...@googlegroups.com

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Error when running SWAT+ for the first time

Matthew: The HYDGRP column should a,b,c or d not b/d, etc. Nancy From: qswa...@googlegroups.com

Oct 7

Matthew Lombardo, Chris George3

Oct 7

Error with pH and CaCO3 Columns in Usersoil

Thank you this worked, and thank you for all your help so far Chris! On Friday, 3 October 2025 at 09:

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Error with pH and CaCO3 Columns in Usersoil

Thank you this worked, and thank you for all your help so far Chris! On Friday, 3 October 2025 at 09:

Oct 7

Matthew Lombardo, Chris George2

Sep 30

Error Inputting Manual Usersoil

Usersoil tables are different from SSURGO ones and you should only follow SSURGO examples if using

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Error Inputting Manual Usersoil

Usersoil tables are different from SSURGO ones and you should only follow SSURGO examples if using

Sep 30

Matthew Lombardo, Chris George3

Sep 30

Error from Pond/Reservoir Shapefile

Hi Chris, Thank you for the advice! I thought I properly reprojected it, but I'll check and make

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Error from Pond/Reservoir Shapefile

Hi Chris, Thank you for the advice! I thought I properly reprojected it, but I'll check and make

Sep 30

Sep 30

Subdaily calibration in SWAT+ Toolbox

Hi everyone, Does anyone know how to calibrate using subdaily simulations and observation? While I am

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Subdaily calibration in SWAT+ Toolbox

Hi everyone, Does anyone know how to calibrate using subdaily simulations and observation? While I am

Sep 30

bharadwaj mandala

Sep 30

Facing issues with step-2 create HRUs

Hello All, Can anyone Help me with Step-2 Create HRUs with LULC data and Soil data.

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Facing issues with step-2 create HRUs

Hello All, Can anyone Help me with Step-2 Create HRUs with LULC data and Soil data.

Sep 30

Matthew Lombardo, Nancy B. Sammons3

Sep 27

Missing Moist Soil Albedo Parameter

Hi Nancy, This definitely helps, thank you! Do you know if SWAT+ accepts ranges for the parameters?

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Missing Moist Soil Albedo Parameter

Hi Nancy, This definitely helps, thank you! Do you know if SWAT+ accepts ranges for the parameters?

Sep 27

Matthew Lombardo

Sep 23

Help with Soil Lookup Tables

Hi all, I forgot to add one question to my last post. Can I input a range instead of a single value

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Help with Soil Lookup Tables

Hi all, I forgot to add one question to my last post. Can I input a range instead of a single value

Sep 23

Matthew Lombardo

Sep 23

Building Soil Lookup and Usersoil Tables

Does anyone have experience with building a soil lookup table and usersoil table? Also, does anyone

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Building Soil Lookup and Usersoil Tables

Does anyone have experience with building a soil lookup table and usersoil table? Also, does anyone

Sep 23

phoebe murage, Nancy B. Sammons3

Sep 22

RUNNING SWAT+ REV 61.0.1_Unable to create Basin_wb_aa

Hi Nancy, I am not sure it successfully runs because I keep getting the error message for the

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RUNNING SWAT+ REV 61.0.1_Unable to create Basin_wb_aa

Hi Nancy, I am not sure it successfully runs because I keep getting the error message for the

Sep 22

Veronica Koess, Chris George2

Sep 19

QSWAT+ not responding due to large data processing

It is not clear to me what you mean. I suspect it is QSWAT+ that is running slowly: delineation and

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QSWAT+ not responding due to large data processing

It is not clear to me what you mean. I suspect it is QSWAT+ that is running slowly: delineation and

Sep 19

Matthew Lombardo

Sep 18

Missing Soil ID's from SSURGO swat_soils.sqlite

Hi everyone, Thank you for your responses so far. I am trying to use SSURGO data, but none of my soil

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Missing Soil ID's from SSURGO swat_soils.sqlite

Hi everyone, Thank you for your responses so far. I am trying to use SSURGO data, but none of my soil

Sep 18

Sep 17

Help...1st time user...

Traceback (most recent call last): File "actions\import_gis.py", line 140, in

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Help...1st time user...

Traceback (most recent call last): File "actions\import_gis.py", line 140, in

Sep 17

Sep 17

Reservoir Point problem

Hello, may I ask why an reservoir point always appears when I create a new HRU in the second step? I

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Reservoir Point problem

Hello, may I ask why an reservoir point always appears when I create a new HRU in the second step? I

Sep 17

楊毓婷, … Chris George4

Sep 17

Would i necessary to provide additional TIF file information? Thank you very much! Chris George 在

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Would i necessary to provide additional TIF file information? Thank you very much! Chris George 在

Sep 17

Matthew Lombardo, Chris George2

Sep 10

Need Help Changing Soil Database

When you select SSURGO in QSWAT+ the use of swatplus_soils.sqlite is automatic. You can only change

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Need Help Changing Soil Database

When you select SSURGO in QSWAT+ the use of swatplus_soils.sqlite is automatic. You can only change

Sep 10

Sep 10

Reservoir channel problem

Hello, I would like to ask about an issue regarding reservoir settings. When my was setting up the

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Reservoir channel problem

Hello, I would like to ask about an issue regarding reservoir settings. When my was setting up the

Sep 10

Matthew Lombardo, Chris George2

Sep 8

SSURGO Soils Database Error

The first error I cannot comment on, but the second is a typo in DBUtils.py. The simplest way to

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SSURGO Soils Database Error

The first error I cannot comment on, but the second is a typo in DBUtils.py. The simplest way to

Sep 8

Matthew Lombardo

Sep 3

No QSWAT Plugin Appearing in QGIS

Hi everyone, My name is Matt Lombardo, a master's student at UConn. I'm trying to use SWAT+

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No QSWAT Plugin Appearing in QGIS

Hi everyone, My name is Matt Lombardo, a master's student at UConn. I'm trying to use SWAT+

Sep 3

Matthew Lombardo

Sep 3

Error When Inputting Landuse and Soil Rasters

Hi everyone, My name is Matt Lombardo and I am a new QGIS and SWAT+ user. I'm a master's

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Error When Inputting Landuse and Soil Rasters

Hi everyone, My name is Matt Lombardo and I am a new QGIS and SWAT+ user. I'm a master's

Sep 3

Dipesh Shrestha

Sep 3

Hello everyone , I came across the error message in QSWAT+. If you have a solution to the issue,

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Hello everyone , I came across the error message in QSWAT+. If you have a solution to the issue,

Sep 3

邓钧, Paulo Amaral2

Aug 29

an error occurred simulate pesticide with swat+

Hello everyone, I am writing to this thread because I am also currently working with the SWAT+ Editor

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an error occurred simulate pesticide with swat+

Hello everyone, I am writing to this thread because I am also currently working with the SWAT+ Editor

Aug 29

Benthe, Nancy B. Sammons2

Aug 27

SWAT+gwflow error basin.carbon.tes not found / hydrograph module floating overflow forrtl error 72

Benthe: Please send your current txtinout and I will take a look at this for you. If the problem is

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SWAT+gwflow error basin.carbon.tes not found / hydrograph module floating overflow forrtl error 72

Benthe: Please send your current txtinout and I will take a look at this for you. If the problem is

Aug 27

Yashas Kumar H K, Nancy B. Sammons2

Aug 27

GWFlow crash: GW_FPLN_INFO subscript error after adding ISRIC/GLHYMPS and reservoirs

Yashas: I will take a look at this for you. Please send your current txtinout. Thank you, Nancy From:

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GWFlow crash: GW_FPLN_INFO subscript error after adding ISRIC/GLHYMPS and reservoirs

Yashas: I will take a look at this for you. Please send your current txtinout. Thank you, Nancy From:

Aug 27

shreya sajeevan, Nancy B. Sammons2

Aug 22

forrtl: error (65): floating invalid

Please check your daily temperature file(s) that is correct units and that Max is always greater than

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forrtl: error (65): floating invalid

Please check your daily temperature file(s) that is correct units and that Max is always greater than

Aug 22

Liaqat Ali Shah, Chris George2

Aug 20

Study area overlapping issue

It is easy in QGIS to assign a projection to a map instead of reprojecting it. I suspect this may

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Study area overlapping issue

It is easy in QGIS to assign a projection to a map instead of reprojecting it. I suspect this may

Aug 20

Aug 14

Thesis on soil organic carbon modelling using SWAT approach

Has anyone done something similar. Can you hep me with methodologies or any other additional

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Thesis on soil organic carbon modelling using SWAT approach

Has anyone done something similar. Can you hep me with methodologies or any other additional

Aug 14

Judith Eeckman, Chris George3

Aug 12

Python error when visualating Results

Yes, It seems like the results files are not written in /TxtInOut. But I don't get any error when

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Python error when visualating Results

Yes, It seems like the results files are not written in /TxtInOut. But I don't get any error when

Aug 12

zahra zeraatkar, … Engr CH M Subhan5

Aug 11

Question about BARR

Some portion of mine landuse being red slice also On Mon, Aug 4, 2025, 6:59 PM Engr CH M Subhan <

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Question about BARR

Some portion of mine landuse being red slice also On Mon, Aug 4, 2025, 6:59 PM Engr CH M Subhan <

Aug 11

Lukhmon Dadojonov

Aug 9

Irrigation canal feeding a reservoir delineated and outflow channel

Dear QSWAT+ community. I need your assitance in clarification of few point, which I encountered

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Irrigation canal feeding a reservoir delineated and outflow channel

Dear QSWAT+ community. I need your assitance in clarification of few point, which I encountered

Aug 9

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