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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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Apr 2

PLEASE READ: New Template for reporting issues

Hi everyone, To ensure the development team and community members can provide the most efficient and

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PLEASE READ: New Template for reporting issues

Hi everyone, To ensure the development team and community members can provide the most efficient and

Apr 2

Thamiris Fontoura

Jul 1

QSWAT+ predefined watershed: fel.tif not created/used during Create Landscape

Hi everyone, I am working with QSWAT+ using a predefined watershed and channel network, not automatic

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QSWAT+ predefined watershed: fel.tif not created/used during Create Landscape

Hi everyone, I am working with QSWAT+ using a predefined watershed and channel network, not automatic

Jul 1

bharadwaj mandala

Jun 30

Help with SWAT+ Calibration: Simulated Flow Much Higher Than Observed

Hello All, I am doing calibration step in SWAT+ (RSWAT) using the weather data; however, the

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Help with SWAT+ Calibration: Simulated Flow Much Higher Than Observed

Hello All, I am doing calibration step in SWAT+ (RSWAT) using the weather data; however, the

Jun 30

Misbah Mehak, Nancy B. Sammons2

Jun 30

Unable to run SWAT+ due to this error

Misbah: I will start by looking at your 'soils.sol' file located in the txtinout folder,

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Unable to run SWAT+ due to this error

Misbah: I will start by looking at your 'soils.sol' file located in the txtinout folder,

Jun 30

bharadwaj mandala, Chris George2

Jun 29

Need Help Resolving 'Conversion from type DBNull to type Integer is not valid' Error During Weather Data Import

Try removing the blank lines in pcpINDEX.txt Chris On 6/29/2026 6:30 PM, bharadwaj mandala wrote:

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Need Help Resolving 'Conversion from type DBNull to type Integer is not valid' Error During Weather Data Import

Try removing the blank lines in pcpINDEX.txt Chris On 6/29/2026 6:30 PM, bharadwaj mandala wrote:

Jun 29

Rashila Sapkota, Rafael Navas2

Jun 25

SWAT+ Calibration Guidance

Hi Rashila, There are several open source packages. You can check for example: SWATrunR, R-SWAT,

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SWAT+ Calibration Guidance

Hi Rashila, There are several open source packages. You can check for example: SWATrunR, R-SWAT,

Jun 25

Girum Getachew, Chris George3

Jun 22

Thank you Chris Skip my question, the problem solved. On Monday, June 22, 2026, Chris George <

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Thank you Chris Skip my question, the problem solved. On Monday, June 22, 2026, Chris George <

Jun 22

Scott Nelson, Chris George2

Jun 20

Definitions for output tables

Hover over wateryld in the Choose variables panel. Click All so you can see all the variables in this

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Definitions for output tables

Hover over wateryld in the Choose variables panel. Click All so you can see all the variables in this

Jun 20

Scott Nelson, Chris George2

Jun 20

Is it normal to have gaps in HRU's across the landscape?

Simple answer: yes in appearance, no in actuality. When you eliminate HRUs, in the data the others

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Is it normal to have gaps in HRU's across the landscape?

Simple answer: yes in appearance, no in actuality. When you eliminate HRUs, in the data the others

Jun 20

Miguel Rodrigues

Jun 19

Implementing reservois post-watershed delineation step

Dear community, I would like to know what is the best approach to implement reservoirs in a

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Implementing reservois post-watershed delineation step

Dear community, I would like to know what is the best approach to implement reservoirs in a

Jun 19

andry rustanto, Scott Nelson2

Jun 19

Integrating remote sensing LAI to SWAT+

I am interested to learn this technique too! On Thursday, April 30, 2026 at 12:39:56 PM UTC-7 rusta..

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Integrating remote sensing LAI to SWAT+

I am interested to learn this technique too! On Thursday, April 30, 2026 at 12:39:56 PM UTC-7 rusta..

Jun 19

Simon DE OLIVEIRA

Jun 11

low simulated flow rates

1. Primary Issue Location Component: QSWAT+, SWAT+ Editor, SWAT+ Executable, or Model Functionality)

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low simulated flow rates

1. Primary Issue Location Component: QSWAT+, SWAT+ Editor, SWAT+ Executable, or Model Functionality)

Jun 11

Olumide Sunday OJO

Jun 11

Please i don't know how to resolve this issues of HRU

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

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Please i don't know how to resolve this issues of HRU

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

Jun 11

Fereshteh Kordrostami

Jun 11

Question about using STATSGO2 soil map with QSWAT+ built-in STATSGO db/lookup table

Hello all, I downloaded the STATSGO2 spatial and tabular data from USDA/NRCS Web Soil Survey for

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Question about using STATSGO2 soil map with QSWAT+ built-in STATSGO db/lookup table

Hello all, I downloaded the STATSGO2 spatial and tabular data from USDA/NRCS Web Soil Survey for

Jun 11

Yuxiang Ren, Chris George2

Jun 9

Multiple lake outlets ignored warning

Is there a reason for using a release of QSWAT from 2024? The NULL arises from the BasinNo field in

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Multiple lake outlets ignored warning

Is there a reason for using a release of QSWAT from 2024? The NULL arises from the BasinNo field in

Jun 9

Eskinder Zinabu Belachew, Nancy B. Sammons2

Jun 8

no or zero simulated flows at outlet channel

Eskinder: Send me your current txinout folder and I will take a look. Thanks, Nancy From: qswatplus@

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no or zero simulated flows at outlet channel

Eskinder: Send me your current txinout folder and I will take a look. Thanks, Nancy From: qswatplus@

Jun 8

Jun 8

SWAT Weather Inputs

Can you use WXGEN (the weather generator within SWAT) to calibrate a graph of hydrograph monthly

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SWAT Weather Inputs

Can you use WXGEN (the weather generator within SWAT) to calibrate a graph of hydrograph monthly

Jun 8

Rashila Sapkota, Nancy B. Sammons2

Jun 5

Request for SWAT-Compatible Soil Map File for HRU Creatio

Rashila: Dr. Bawa and his team have updated the SSURGO and STATGO databases. You can find these at

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Request for SWAT-Compatible Soil Map File for HRU Creatio

Rashila: Dr. Bawa and his team have updated the SSURGO and STATGO databases. You can find these at

Jun 5

RAJESH RANJAN, Chris George2

Jun 4

OUTLET POINTS ARE NOT VISIBLE ON LAYER

The problem was fixed in QSWAT+ 3.2.1. What version are you using? You don't see the symbol for a

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OUTLET POINTS ARE NOT VISIBLE ON LAYER

The problem was fixed in QSWAT+ 3.2.1. What version are you using? You don't see the symbol for a

Jun 4

Chris George, … RAJESH RANJAN3

Jun 4

QSWAT and QSWAT+ available for QGIS 3.44

same issue here also. On Friday, March 27, 2026 at 4:24:02 AM UTC+5:30 egla...@gmail.com wrote: Chris

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QSWAT and QSWAT+ available for QGIS 3.44

same issue here also. On Friday, March 27, 2026 at 4:24:02 AM UTC+5:30 egla...@gmail.com wrote: Chris

Jun 4

Jun 3

Question About Biomass Outputs for Multiple Crops in a Single HRU SWAT+

1. Primary Issue Location Component: SWAT+ Executable / Model Functionality Area of Impact: Model

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Question About Biomass Outputs for Multiple Crops in a Single HRU SWAT+

1. Primary Issue Location Component: SWAT+ Executable / Model Functionality Area of Impact: Model

Jun 3

Saba Shaghaghi, … Chris George5

May 29

SWAT+ Delineation and HPC running error

If watershed delineation comes up with a different boundary than the one you think is correct, you

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SWAT+ Delineation and HPC running error

If watershed delineation comes up with a different boundary than the one you think is correct, you

May 29

May 29

Persistent QSWAT Error in delineate watersheds

New to QSWAT. Thanks for any help! Failed to remove old inlet/outlet file C:\Users\scott\OneDrive\

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Persistent QSWAT Error in delineate watersheds

New to QSWAT. Thanks for any help! Failed to remove old inlet/outlet file C:\Users\scott\OneDrive\

May 29

Rashiid Abdi Dugsiiye, Abdurrahman Aweis Ali4

May 29

Problem with weather data import

Sure, here it is. On Mon, May 25, 2026 at 3:05 AM Abdurrahman Aweis Ali <aw...@siu.edu.so>

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Problem with weather data import

Sure, here it is. On Mon, May 25, 2026 at 3:05 AM Abdurrahman Aweis Ali <aw...@siu.edu.so>

May 29

Rashiid Abdi Dugsiiye

May 18

Problems importing weather data files

'm using an updated version of Swat Plus 3.2.3 & Qswat 3.0.3, but i'm still having

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Problems importing weather data files

'm using an updated version of Swat Plus 3.2.3 & Qswat 3.0.3, but i'm still having

May 18

Simon DE OLIVEIRA, Nancy B. Sammons2

May 12

weather station issues

In the table, use commas. Check that your computer is set for English units; ID;NAME;LAT;LONG;

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weather station issues

In the table, use commas. Check that your computer is set for English units; ID;NAME;LAT;LONG;

May 12

May 11

SWAT+ Toolbox v3.2.0: DDS Calibration Runs Successfully but NSE/KGE/RMSE/PBIAS Display as NaN

The Problem DDS calibration in SWAT+ Toolbox appears to run successfully: hydrographs are generated

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SWAT+ Toolbox v3.2.0: DDS Calibration Runs Successfully but NSE/KGE/RMSE/PBIAS Display as NaN

The Problem DDS calibration in SWAT+ Toolbox appears to run successfully: hydrographs are generated

May 11

May 11

SWAT+ Toolbox DDS Calibration Produces Valid Hydrograph and KGE but Statistics Table Shows NaN Values

Hello everyone, I am working on calibrating a snowmelt-dominated watershed using SWAT+ Toolbox and

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SWAT+ Toolbox DDS Calibration Produces Valid Hydrograph and KGE but Statistics Table Shows NaN Values

Hello everyone, I am working on calibrating a snowmelt-dominated watershed using SWAT+ Toolbox and

May 11

Katlego Mateta, Chris George4

May 8

QSWAT + Plugin assistance

In my experience this issue does not cause any problems with QSWAT+ (or QSWAT) projects. You can

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QSWAT + Plugin assistance

In my experience this issue does not cause any problems with QSWAT+ (or QSWAT) projects. You can

May 8

Dolores Sanchez, Chris George2

May 8

Problem to active the QSWAT PLUGIN

You need to install QSWAT version 2.1.0 or 2.1.1. Chris On 5/8/2026 5:44 AM, Dolores Sanchez wrote:

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Problem to active the QSWAT PLUGIN

You need to install QSWAT version 2.1.0 or 2.1.1. Chris On 5/8/2026 5:44 AM, Dolores Sanchez wrote:

May 8

Simon DE OLIVEIRA

May 6

Hello everyone, I am trying to extract landscape and soil data using World Grid for a specific

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Hello everyone, I am trying to extract landscape and soil data using World Grid for a specific

May 6

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