How to view and change land use of HRU in textinout folder?
203 views
Skip to first unread message
Liem Nguyen Duy
Jan 4, 2013, 10:56:16 AM1/4/13
to SWAT-user, ArcSWAT, Cole Green Rossi, Georgie Mitchell, Jeff Arnold, Mauro Di Luzio, Mike White, Nancy Sammons, Raghavan Srinivasan
Dear all,
--
Nguyễn Duy Liêm.
Trung tâm Nghiên cứu Biến đổi Khí hậu,
Trường Đại học Nông Lâm TP. HCM.
Địa chỉ: phường Linh Trung, quận Thủ Đức, Tp. HCM, Việt Nam
I am interested in assessing the impacts of land use change on water disharge and sediment in a watershed at HRU level.
But I do not know how to view and change land use of HRU in textinout folder.
Anyone can give me some ideas?
I am looking forward to hearing from you,
Thanks a lot,
Liem
Trung tâm Nghiên cứu Biến đổi Khí hậu,
Trường Đại học Nông Lâm TP. HCM.
Địa chỉ: phường Linh Trung, quận Thủ Đức, Tp. HCM, Việt Nam
Website:
http://rccc.hcmuaf.edu.vn/
Email: nguyen...@gmail.com
Email: nguyen...@gmail.com
nguyen...@yahoo.com
Nong Lam University- Ho Chi Minh City.
Address: Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam.
Address: Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam.
Mobile: (+84) 0983-613-551
EmilyS
Jan 4, 2013, 5:57:48 PM1/4/13
to arc...@googlegroups.com, SWAT-user, Cole Green Rossi, Georgie Mitchell, Jeff Arnold, Mauro Di Luzio, Mike White, Nancy Sammons, Raghavan Srinivasan
Liem,
If you know which HRU's you are concerned with changing landuse types for, you can find the *.hru file for that particular HRU in TxtInOut. The top line has an entry for "Luse:" after which the four-lettered landuse for that HRU follows and could be changed.
What I have done in the past is open up the output.sub file in TxtInOut and pull out the water and sediment yield columns on a subbasin level. I then set up a second model with all the same inputs and only a different landuse raster and run SWAT again. And then I pull the same two columns out and compute a percent change. Additionally, I map the computed difference to a subbasin shapefile and look at the change visually. I do not know if SWAT writes out the results on an HRU basis or not but I cannot find it.
- EmilyS
If you know which HRU's you are concerned with changing landuse types for, you can find the *.hru file for that particular HRU in TxtInOut. The top line has an entry for "Luse:" after which the four-lettered landuse for that HRU follows and could be changed.
What I have done in the past is open up the output.sub file in TxtInOut and pull out the water and sediment yield columns on a subbasin level. I then set up a second model with all the same inputs and only a different landuse raster and run SWAT again. And then I pull the same two columns out and compute a percent change. Additionally, I map the computed difference to a subbasin shapefile and look at the change visually. I do not know if SWAT writes out the results on an HRU basis or not but I cannot find it.
- EmilyS
Jim Almendinger
Jan 4, 2013, 6:53:06 PM1/4/13
to EmilyS, SWAT-user, arc...@googlegroups.com
To get HRU output, uncheck the "limit HRU output" box before running the model. After running the model, select "Read SWAT Output" to read selected output files into an Access database (scenarios/default/tablesout). Using queries in Access is MUCH easier than manipulating the text files, generally speaking.
As for changing CN2 values, I tend to do it in the mgt1 table for selected HRUs (or for all of them if I'm doing initial calibration to get things in the right range). I would generally not change the database values, though I do see that ArcSWAT seems to give you that option. I don't know why that doesn't work -- but in any case I'd make copies of the original databases for use with future models before altering any values.
-- Jim
As for changing CN2 values, I tend to do it in the mgt1 table for selected HRUs (or for all of them if I'm doing initial calibration to get things in the right range). I would generally not change the database values, though I do see that ArcSWAT seems to give you that option. I don't know why that doesn't work -- but in any case I'd make copies of the original databases for use with future models before altering any values.
-- Jim
From: "EmilyS" <ylim...@gmail.com>
To: arc...@googlegroups.com
Cc: "SWAT-user" <swat...@googlegroups.com>, "Cole Green Rossi" <cole....@ars.usda.gov>, "Georgie Mitchell" <georgie....@ars.usda.gov>, "Jeff Arnold" <jeff....@ars.usda.gov>, "Mauro Di Luzio" <mdil...@brc.tamus.edu>, "Mike White" <mike....@ars.usda.gov>, "Nancy Sammons" <nancy....@ars.usda.gov>, "Raghavan Srinivasan" <r-srin...@tamu.edu>
Sent: Friday, January 4, 2013 4:57:48 PM
Subject: [ArcSWAT:4840] Re: How to view and change land use of HRU in textinout folder?
To: arc...@googlegroups.com
Cc: "SWAT-user" <swat...@googlegroups.com>, "Cole Green Rossi" <cole....@ars.usda.gov>, "Georgie Mitchell" <georgie....@ars.usda.gov>, "Jeff Arnold" <jeff....@ars.usda.gov>, "Mauro Di Luzio" <mdil...@brc.tamus.edu>, "Mike White" <mike....@ars.usda.gov>, "Nancy Sammons" <nancy....@ars.usda.gov>, "Raghavan Srinivasan" <r-srin...@tamu.edu>
Sent: Friday, January 4, 2013 4:57:48 PM
Subject: [ArcSWAT:4840] Re: How to view and change land use of HRU in textinout folder?
--
You received this message because you are subscribed to the Google Groups "ArcSWAT" group.
To view this discussion on the web visit https://groups.google.com/d/msg/arcswat/-/y8mFnzMnW8gJ.
To post to this group, send email to arc...@googlegroups.com.
To unsubscribe from this group, send email to arcswat+u...@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/arcswat?hl=en.
NOTE: This message was trained as non-spam. If this is wrong, please correct the training as soon as possible.
Spam
Not spam
Forget previous vote
You received this message because you are subscribed to the Google Groups "ArcSWAT" group.
To view this discussion on the web visit https://groups.google.com/d/msg/arcswat/-/y8mFnzMnW8gJ.
To post to this group, send email to arc...@googlegroups.com.
To unsubscribe from this group, send email to arcswat+u...@googlegroups.com.
For more options, visit this group at http://groups.google.com/group/arcswat?hl=en.
NOTE: This message was trained as non-spam. If this is wrong, please correct the training as soon as possible.
Spam
Not spam
Forget previous vote
--
Dr. James E. Almendinger
St. Croix Watershed Research Station
Science Museum of Minnesota
16910 152nd St N
Marine on St. Croix, MN 55047
tel: 651-433-5953 ext 19
St. Croix Watershed Research Station
Science Museum of Minnesota
16910 152nd St N
Marine on St. Croix, MN 55047
tel: 651-433-5953 ext 19
Mikhail Titov
Jan 4, 2013, 11:37:02 AM1/4/13
to swat...@googlegroups.com, ArcSWAT, Cole Green Rossi, Georgie Mitchell, Jeff Arnold, Mauro Di Luzio, Mike White, Nancy Sammons, Raghavan Srinivasan
On Friday, January 4, 2013 9:56:16 AM UTC-6, nguyenduy wrote:
I am interested in assessing the impacts of land use change on water disharge and sediment in a watershed at HRU level.But I do not know how to view and change land use of HRU in textinout folder.
http://www.catb.org/~esr/faqs/smart-questions.html#before
There was a question just before you asked about it.
https://groups.google.com/d/msg/swatuser/ljPMNZyGlSM/uWzQq_F7ArIJ
Anyone can give me some ideas?
Reply all
Reply to author
Forward
0 new messages