Publications
SWAT Viewer Blog
Map Legend is here!
May 2, 2020
Map legend is finally here! It’s located just below the variable list. It also allows to configure the colors. Simply double-click the legend and the
Integrate Modified SWAT Version in Action
April 7, 2018
The basic processes to make the modified SWAT version work with SWAT Output Viewer has been covered in previous video. Many users wants to have
Tutorial #3: Load Observed Data
February 27, 2018
Observed data could be loaded to SWAT Output Viewer to be compared with the simulation results evaluate the model performance. This video talked about how
Tutorial #2: Run Simulation
February 16, 2018
The SWAT model is ready to run after opened in SWAT Viewer. There are two options for the simulation run: simulation engine and output time
QSWAT vs. MWSWAT
February 16, 2018
QSWAT and MWSWAT is very similar in terms of interface design although they are programmed with different programming languages and in different GIS platform. In
Tutorial #1: Open SWAT Project
February 8, 2018
Most of the SWAT users use ArcSWAT, QSWAT or MWSWAT to create their models. The SWAT projects created with these tools could be opened directly
SWAT Output Spatial Visualizaiton
January 21, 2018
There are many ways to see SWAT outputs. Spatial visualization shows the model results on a map. It will clearly show how the selected results
Add Modified SWAT Version to SWAT Viewer
January 16, 2018
The SWAT Viewer supports any modified SWAT versions so you can analyze the results and compare with other versions. This video shows you the steps
Compare SWAT Versions in SWAT Viewer
January 14, 2018
A great thing about SWAT is that it’s open source. The algorithms could be modified to best fit the study areas. For a modified version,
Manually Create SWAT Project to use SWAT Viewer
January 11, 2018
In some research, the SWAT models are created differently. Only the model input files and some of the shapefiles are available. In this case, you
Model Structure of SWAT Project
January 10, 2018
SWAT projects created by ArcSWAT and QSWAT shares the same structure. In this video, I talked about the structure and how the SWAT Viewer use
Input Conversion Error
January 10, 2018
Some SWAT users have experienced the input conversion error when running the SWAT model. The video below will show you what causes this error and
Exporting Map to PNG File
July 8, 2017
It has been requested to export the map to a file. Here it is:) Simply choose the Export Map menu from the map context menu
Test your customized SWAT model with SWAT Output Viewer
May 16, 2017
In research, the SWAT source codes are usually modified to add new features or integrate new algorithms. To demonstrate the improvement, it’s often required to
Quickly Check SWAT Model Performance with SWAT Output Viewer
May 3, 2017
During SWAT model calibration, the simulated flow, sediment, nitrogen and phosphorus results are frequently compared with observed values to evaluate the model performance. SWAT Output
Switch Time for Thematic Map
May 3, 2017
The thematic map in SWAT Output Viewer is able to show data of three summary types: single time step, annual and average annual. For single
Export Annual Result to CSV File
May 3, 2017
Some research focus on the nutrient load at the outlet. An annual load table would be helpful. With SWAT Output Viewer, the table could be exported
ArcSWAT Error – Try inserting or pasting less data: IN, mWriteInputFiles.sol
January 20, 2016
If you get error messages like below, you come to the right place. It means you are trying to write more data than the data
SWAT Bug in Reading CHM file
July 6, 2015
SWAT Bug in Reading CHM fileIf you are dealing with more than 6 soil layers, be cautious on the water quality outputs. A bug in
Compile and Debug SWAT with gfortran and Eclipse
October 1, 2014
As a SWAT modeller and programmer, it’s very natural that I want to go deep into the SWAT source codes whenever questions come out. And
Work Flow of Point Source and Reservoir Monthly/Daily Discharge File Generation
September 25, 2014
When reservoir outflow is simulated with measured daily/monthly outflow, a discharge file (.day/.mon) would be generated. The file would be overwritten when the simulation is
Default CN2 in MGT
September 25, 2014
A default CN2 is defined in mgt file as shown in following examples. 49.00 | CN2: Initial SCS CN II value Question 1: Where does
SWAT Changes from Rev 622 to Rev 627
July 16, 2014
Updates July 17,2014: The SWAT Team had confirmed that prf_bsn should be real rather than integer. It would probably be fixed in next release. SWAT is updated
ArcSWAT Bug – Index was outside the bounds of the array.: IN, mWriteInputFiles.sol
July 11, 2014
Description ArcSWAT 2012.10.15 SSURGO Soil Database is used Following error message is given when running Create Tables Reason When generation sol table, ArcSWAT would do
Single Document about Compiling and Debugging SWAT with GFortran and Eclipse
February 28, 2014
After several posts about compiling and debugging SWAT with GFortran and Eclipse, I think it would be good to compile all the posts into an
Analysis of ArcSWAT Output Export – Why doesn’t SWAT Change Result Format a little bit?
February 12, 2014
What happened when the “Import Files to Database” button is clicked? Copy SWATOutput.mdb from C:\swat\ArcSWAT\Databases\SWATOutput.mdb to [ArcSWAT Project]\Scenarios\Default\TablesOut. The previous database will be overwritten. Copy
Makefile Updated – 1) No Need to Modify main.f any more; 2) A Single Makefile; 3) 64-bit Build
February 10, 2014
Download Link Makefile Generator, Makefile The Makefile is updated again. Main changes are: Don’t compile modparm.f any more to keep SWAT codes unchange. Don’t generate
SWAT Makefile Updated – Ignore Underflow
February 2, 2014
The SWAT Makefile is updated again. Underflow flag is removed to get same results as official SWAT. Download Link Makefile Generator, Debug Makefile, Release Makefile
MinGW Installation Guide for SWAT Debugging
January 28, 2014
Please note that the administrative privilege is not needed in the whole processes. MinGW would not add entries into register system or change the environment
Debug SWAT in Eclipse – Utilize Makefile
January 28, 2014
Don’t Want to Go through all these Processes? No problem. The Eclipse project created in this post is uploaded to Google Code: https://swat-eclipse.googlecode.com/svn/trunk/SWAT_Makefile. Just check
SWAT Makefile Updated – Stop running when overflow happens
January 24, 2014
Note: This version is updated in next post SWAT Makefile Updated – Ignore Underflow, where underflow flag is removed. The Makefile published in previous blog Makefile
Makefile – Compile SWAT using gfortran without modification
January 23, 2014
Note: The makefile here is an older version. For the latest version, please visit another post SWAT Makefile Updated – Stop running when overflow happens. Quick Download
Interesting Test – Install ArcSWAT for ArcGIS 10.0/10.1 on ArcGIS 9.3
January 20, 2014
Interesting Test – Install ArcSWAT for ArcGIS 10.0/10.1 on ArcGIS 9.3 Method in post “Manually Install ArcSWAT” was used to install ArcSWAT for ArcGIS 10.0/10.1
Manually Install ArcSWAT
January 20, 2014
Quick Download Link Extract Installation File ArcGIS 9.3: Register, Unregister ArcGIS 10.0 and higher: Register, Unregister Note: The bat file needs to be saved in
Eclipse Compatible SWAT Updated to Rev 614 – Fix ET > PET bug
January 15, 2014
SWAT model was update to rev 614 on Jan 7, 2014. Based on the difference between rev 613 and rev 614, the Eclipse compatible version
ArcSWAT Structure – Developer View
January 13, 2014
ArcSWAT is the standard SWAT interface which is used by most of the modelers. Knowing its structure would help understand what’s going on under each
Find Possible Solution for ArcSWAT Errors with ildasm.exe
January 13, 2014
For more details about ArcSWAT structure, please check out my another post: ArcSWAT Structure – Developer View. Please Note: SWATEditor and SWAT Check are also
Compile and Run SWAT with Photran + MinGW – the easiest way to remove mathematical errors from SWAT
January 5, 2014
Eclipse-friendly SWAT rev 613 codes: https://code.google.com/p/swat-eclipse/. TortoiseSVN is recommended to check out the codes. Quick Download Link Photran/PTP/Eclipse, MinGW Or you could send me (hawklorry@gmail.com)
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