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Welcome to the SWAT+ model user discussion group.

Please note this group is for questions and discussion related to the model itself, not the editor or the GIS interfaces. 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

Camilla Negri, Natalja C.3

Sep 30

extreme sediment peaks following no precipitation events

Hi Natalja and all, swatplus-62-ifo-win_amd64-Rel.exe I don't think this was actually an issue,

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extreme sediment peaks following no precipitation events

Hi Natalja and all, swatplus-62-ifo-win_amd64-Rel.exe I don't think this was actually an issue,

Sep 30

Sep 28

Join us January 4-8 in India for the next SWAT Conference & Workshops

𝐒𝐖𝐀𝐓 𝐜𝐨𝐧𝐟𝐞𝐫𝐞𝐧𝐜𝐞 2027- 𝐈𝐧𝐝𝐢𝐚 (Call for Abstracts and Registration Open) 𝐉𝐚𝐧𝐮𝐚𝐫𝐲 4–5, 2027 – 𝐇𝐚𝐧𝐝𝐬-𝐨𝐧

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Join us January 4-8 in India for the next SWAT Conference & Workshops

𝐒𝐖𝐀𝐓 𝐜𝐨𝐧𝐟𝐞𝐫𝐞𝐧𝐜𝐞 2027- 𝐈𝐧𝐝𝐢𝐚 (Call for Abstracts and Registration Open) 𝐉𝐚𝐧𝐮𝐚𝐫𝐲 4–5, 2027 – 𝐇𝐚𝐧𝐝𝐬-𝐨𝐧

Sep 28

marianna leone, … Grace5

Sep 25

Perennial plant growth problem

Related to this: I'm seeing a separate perennial issue in rev 62 where forest and grass surface

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Perennial plant growth problem

Related to this: I'm seeing a separate perennial issue in rev 62 where forest and grass surface

Sep 25

bharadwaj mandala, Natalja C.2

Sep 23

Guidance Needed on SWAT Calibration Without Observed Streamflow Data

All of the points you raised are extensively discussed in the hydrological modeling and SWAT

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Guidance Needed on SWAT Calibration Without Observed Streamflow Data

All of the points you raised are extensively discussed in the hydrological modeling and SWAT

Sep 23

ABEBE HEGANO, Natalja C.2

Sep 23

swatplus@googlegroup

Hello, Please read the pinned post and repost with a full description of the issue. Natalja On

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swatplus@googlegroup

Hello, Please read the pinned post and repost with a full description of the issue. Natalja On

Sep 23

Liyas Mühendislik, … Natalja C.3

Sep 23

Request for a Tutorial on Modeling an Intermediate Watershed Between an Upstream Inlet and Downstream Outlet

Hello, Great suggestion and I will pass it over to the workshop organizers. Natalja On Wednesday, 19

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Request for a Tutorial on Modeling an Intermediate Watershed Between an Upstream Inlet and Downstream Outlet

Hello, Great suggestion and I will pass it over to the workshop organizers. Natalja On Wednesday, 19

Sep 23

Mahmudur Rahman, Natalja C.2

Sep 23

forrtl: error (65): floating invalid— what should I check?

Hello, Please read the pinned post and repost with a full description of the issue. Natalja On

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forrtl: error (65): floating invalid— what should I check?

Hello, Please read the pinned post and repost with a full description of the issue. Natalja On

Sep 23

Isaac Kraenbring, Natalja C.3

Sep 23

Winter Wheat Growth Issue

Reported to the Tools team, Thank you Natalja

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Winter Wheat Growth Issue

Reported to the Tools team, Thank you Natalja

Sep 23

Adrien Delaval, Natalja C.3

Sep 23

No erosion on subdaily SWAT + ?

Reported to the Editor team, Thank you! Natalja On Friday, 17 July 2026 at 10:52:09 UTC-5 Adrien

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No erosion on subdaily SWAT + ?

Reported to the Editor team, Thank you! Natalja On Friday, 17 July 2026 at 10:52:09 UTC-5 Adrien

Sep 23

Céline Kauer, Natalja C.3

Sep 23

Crash with 2+ water_allocation_wro objects — forrtl: severe (151): allocatable array is already allocated in water_allocation_read.f90

Hello, The issue is with incorrect file formats. You are in contact with the dev team to correct your

unread,

Crash with 2+ water_allocation_wro objects — forrtl: severe (151): allocatable array is already allocated in water_allocation_read.f90

Hello, The issue is with incorrect file formats. You are in contact with the dev team to correct your

Sep 23

Ilef Abid, Natalja C.3

Sep 23

BARL–OATS Mixed Crop Plant Community Initialization

Answering further: If BARL and OATS are both defined in the same plant.ini plant community and are

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BARL–OATS Mixed Crop Plant Community Initialization

Answering further: If BARL and OATS are both defined in the same plant.ini plant community and are

Sep 23

Sep 21

LAI and plant stress outputs permanently zero across entire 46-year run (SWAT+ rev 62, SWAT+ Editor 4.0.2)

I'm running a SWAT+ rev 62 model (built with SWAT+ Editor 4.0.2, QSWAT+) of a small alpine

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LAI and plant stress outputs permanently zero across entire 46-year run (SWAT+ rev 62, SWAT+ Editor 4.0.2)

I'm running a SWAT+ rev 62 model (built with SWAT+ Editor 4.0.2, QSWAT+) of a small alpine

Sep 21

Sep 21

problems with perennial plants

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

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problems with perennial plants

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

Sep 21

Sep 14

Nutrient modelling in SWAT+

Dear group, I have a question about nitrogen modelling in SWAT+. When calibrating NH₄ against in-situ

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Nutrient modelling in SWAT+

Dear group, I have a question about nitrogen modelling in SWAT+. When calibrating NH₄ against in-situ

Sep 14

Sep 14

Swat+ toolbox 4.0 dont walk

Hello everyone, I have successfully run the simulation in SWATPlus Editor v 4.0.1. However, SWATPlus

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Swat+ toolbox 4.0 dont walk

Hello everyone, I have successfully run the simulation in SWATPlus Editor v 4.0.1. However, SWATPlus

Sep 14

Sep 8

Measured precip stops after ~17 years (6210 daily records) — WGN fallback on 61.0.1 / 61.0.2 / 61.0.2.61 (Editor 3.2.4)

1. Primary Issue Location Component: SWAT+ Executable (cli_pmeas.f90 / cli_precip_control.f90) Area

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Measured precip stops after ~17 years (6210 daily records) — WGN fallback on 61.0.1 / 61.0.2 / 61.0.2.61 (Editor 3.2.4)

1. Primary Issue Location Component: SWAT+ Executable (cli_pmeas.f90 / cli_precip_control.f90) Area

Sep 8

Sep 8

data not uploaded

Traceback (most recent call last): File "peewee.py", line 3291, in execute_sql sqlite3.

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data not uploaded

Traceback (most recent call last): File "peewee.py", line 3291, in execute_sql sqlite3.

Sep 8

Sep 8

Forest C near bare-soil in rev 62 — per-plant vs basin residue decomp, and cfac=1 hardwire

Hi all, SWAT+ rev 2026.62, Editor v4.0.1, ~62% temperate deciduous forest watershed. Forest sediment

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Forest C near bare-soil in rev 62 — per-plant vs basin residue decomp, and cfac=1 hardwire

Hi all, SWAT+ rev 2026.62, Editor v4.0.1, ~62% temperate deciduous forest watershed. Forest sediment

Sep 8

Saeed Golian, ABEBE HEGANO2

Sep 8

Access Violation error-SWAT+ with gwflow module

Dear Saeed, I had similar issues to yours. I would like to share how mine was fixed. 1) Your SWAT+

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Access Violation error-SWAT+ with gwflow module

Dear Saeed, I had similar issues to yours. I would like to share how mine was fixed. 1) Your SWAT+

Sep 8

sharafat hussain

Sep 1

Gwflow observation wells not generating output (rev. 62) — missing gwflow.input, no observation-cell mechanism in Editor

Hi All, I am having the following issue SWAT+ Issue Report Template 1. Primary Issue Location

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Gwflow observation wells not generating output (rev. 62) — missing gwflow.input, no observation-cell mechanism in Editor

Hi All, I am having the following issue SWAT+ Issue Report Template 1. Primary Issue Location

Sep 1

sharafat hussain

Sep 1

gwflow observation wells not generating output (rev. 62) — missing gwflow.input, no observation-cell mechanism in Editor

Hi All I have the following issue SWAT+ Issue Report Template 1. Primary Issue Location Component:

unread,

gwflow observation wells not generating output (rev. 62) — missing gwflow.input, no observation-cell mechanism in Editor

Hi All I have the following issue SWAT+ Issue Report Template 1. Primary Issue Location Component:

Sep 1

Aug 28

Access Violation error-gwflow

Hi all, I have the following error while trying to run model with gwflow as the groundwater module:

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Access Violation error-gwflow

Hi all, I have the following error while trying to run model with gwflow as the groundwater module:

Aug 28

Aug 28

wetland and runoff from HRU

In hydrology.wet, hru_frac is documented as "fraction of HRU that drains into wetland".

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wetland and runoff from HRU

In hydrology.wet, hru_frac is documented as "fraction of HRU that drains into wetland".

Aug 28

hanibal genet, Nancy B. Sammons2

Aug 21

error correction

Please send me your current txinout folder and I will take a look. Thank you, Nancy From: swatplus@

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error correction

Please send me your current txinout folder and I will take a look. Thank you, Nancy From: swatplus@

Aug 21

Aug 20

Transmission loss is not added to the aquifer recharge

SWAT+ Issue Report Template 1. Primary Issue Location Component: QSWAT+, SWAT+ Editor, Area of impact

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Transmission loss is not added to the aquifer recharge

SWAT+ Issue Report Template 1. Primary Issue Location Component: QSWAT+, SWAT+ Editor, Area of impact

Aug 20

Ilef Abid, Natalja C.3

Aug 18

Modelling intercropping in SWAT+

thank you Le mercredi 8 juillet 2026 à 16:00:45 UTC+3, Natalja C. a écrit : Hi, Setting up

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Modelling intercropping in SWAT+

thank you Le mercredi 8 juillet 2026 à 16:00:45 UTC+3, Natalja C. a écrit : Hi, Setting up

Aug 18

Panji Mahendra, Nancy B. Sammons2

Aug 12

pls halp me for debug

Please send me your current txtinout folder and I will take a look at this for you. From: swatplus@

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pls halp me for debug

Please send me your current txtinout folder and I will take a look at this for you. From: swatplus@

Aug 12

Aug 4

Difference between QSWAT+ Visualization and SWAT+toolbox

Dear members, I got problem in flow (m3/s) value in QSWAT+ visualization and in SWAT+toolbox

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Difference between QSWAT+ Visualization and SWAT+toolbox

Dear members, I got problem in flow (m3/s) value in QSWAT+ visualization and in SWAT+toolbox

Aug 4

Grace, Jaclyn Tech3

Jul 31

SWAT+ Editor Model Output

Hello, thank you for the response. I am specifically trying to look for sediment by landuse. Would

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SWAT+ Editor Model Output

Hello, thank you for the response. I am specifically trying to look for sediment by landuse. Would

Jul 31

Liton Chandra Mazumder

Jul 21

Request for helping for Water Balance Check

Hi Everyone, I run the SWAT+ model. After simulation of the model, I have checked water balance.

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Request for helping for Water Balance Check

Hi Everyone, I run the SWAT+ model. After simulation of the model, I have checked water balance.

Jul 21

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