[GRASS-user] Help with r.landscape.evol

hi
am trying to model gully erosion changes using the r.landscape.evol i get an erros as the output to excel is blank. i kindly as if there is any tutorial using this tool that can guide me.

Thanks

Nick

On Sun, Sep 9, 2018 at 11:55 PM Nicholas Uwadia
<uwadianicholas@gmail.com> wrote:

hi
am trying to model gully erosion changes using the r.landscape.evol i get an erros as the output to excel is blank. i kindly as if there is any tutorial using this tool that can guide me.

Please post more details - which operating system, which GRASS GIS
version and which error message appears.

Markus

Thanks makus for your reply, i have added more details as required and also the error experienced.
operating system :windows 10
GRASS GIS: 7.4

this is the output command and error

Iteration 1 – step 4: calculating divergence/difference of sediment transport for each process and the actual amount of erosion or deposition in vertical meters/cell/year


Running soft-knee smoothing filter…

Enacting additional “low” smoothing: one pass of a 3x3 modal smoothing window.

ERROR: Unable to load rules file <c:\users\samy\appdata\local\temp\grass7-samy-7592\tmpgyoapy>

Traceback (most recent call last):

File “C:\Users\Samy\AppData\Roaming\GRASS7\addons/scripts/r.landscape.evol.py”, line 681, in

main(x, (x + 1), prefx, statsout, region1[‘nsres’], masterlist);

File “C:\Users\Samy\AppData\Roaming\GRASS7\addons/scripts/r.landscape.evol.py”, line 509, in main

grass.run_command(‘r.colors’, quiet = “True”, map =netchange, rules = nccolors.name)

File “C:\Program Files\GRASS GIS 7.4.0\etc\python\grass\script\core.py”, line 421, in

run_command return handle_errors(returncode, returncode, args, kwargs)

File “C:\Program Files\GRASS GIS 7.4.0\etc\python\grass\script\core.py”, line 332, in

handle_errors returncode=returncode)

grass.exceptions.CalledModuleError: Module run None

[‘r.colors’, ‘–q’, 'rules=c:\users\samy\appdata\local\

temp\grass7-samy-7592\tmpgyoapy’, ‘map=levol_ED_rate’]

ended with error

Process ended with non-zero return code 1. See errors in the

(error) output.

Thanks

On Tue, Sep 11, 2018 at 10:32 PM Markus Neteler <neteler@osgeo.org> wrote:

On Sun, Sep 9, 2018 at 11:55 PM Nicholas Uwadia
<uwadianicholas@gmail.com> wrote:

hi
am trying to model gully erosion changes using the r.landscape.evol i get an erros as the output to excel is blank. i kindly as if there is any tutorial using this tool that can guide me.

Please post more details - which operating system, which GRASS GIS
version and which error message appears.

Markus

Nicholas Uwadia wrote

Thanks makus for your reply, i have added more details as required and
also
the error experienced.
operating system :windows 10
GRASS GIS: 7.4

tested here with OSGeo4W-winGRASS 7.4.1

-----------------------------
r.landscape.evol --verbose elev=elevation@PERMANENT initbdrk=bedrock@user1
smoothing=no prefx=levol_ outdem=elevation outsoil=soildepth number=1
statsout=D:\temp\testadd\test.txt

##################################################
##################################################

STARTING SIMULATION

Beginning iteration sequence. This may take some time.
Process is not finished until you see the message: 'Done with everything'
_____________________________________________________________
_____________________________________________________________
Total number of iterations to be run is 1
Iteration = 1

##################################################

*************************
Iteration 1 -- step 1: calculating slope
*************************

*************************
Iteration 1 -- step 2: calculating accumulated flow depths
*************************
Calculating runoff excess rates (uplsope accumulated cells scaled to
"flowcontrib" map

*************************
Iteration 1 -- step 3: calculating sediment transport rates (units variable
depending upon process)
*************************

*************************
Iteration 1 -- step 4: calculating divergence/difference of sediment
transport for each process and the actual amount of erosion or deposition in
vertical meters/cell/year
*************************

Running soft-knee smoothing filter...
No additional modal smoothing was requested...
ERROR: Unable to load rules file
<c:\users\hkmyr\appdata\local\temp\grass7-hkmyr-8260\tmp3ykzyr>
Traceback (most recent call last):
  File "C:\Users\hkmyr\AppData\Roaming\GRASS7\addons/scripts
/r.landscape.evol.py", line 681, in <module>
    main(x, (x + 1), prefx, statsout, region1['nsres'],
masterlist);
  File "C:\Users\hkmyr\AppData\Roaming\GRASS7\addons/scripts
/r.landscape.evol.py", line 509, in main
    grass.run_command('r.colors', quiet = "True", map =
netchange, rules = nccolors.name)
  File "C:\OSGEO4~1\apps\grass\grass-7.4.1\etc\python\grass\
script\core.py", line 421, in run_command
    return handle_errors(returncode, returncode, args,
kwargs)
  File "C:\OSGEO4~1\apps\grass\grass-7.4.1\etc\python\grass\
script\core.py", line 332, in handle_errors
    returncode=returncode)
grass.exceptions.CalledModuleError: Module run None
['r.colors', '--q', 'rules=c:\\users\\hkmyr\\appdata\\local\
\temp\\grass7-hkmyr-8260\\tmp3ykzyr', 'map=levol_ED_rate']
ended with error
Process ended with non-zero return code 1. See errors in the
(error) output.
----------------------------

confirmed

it seems there is an issue with r.colors reading a temporary color rules
file.

-----
best regards
Helmut
--
Sent from: http://osgeo-org.1560.x6.nabble.com/Grass-Users-f3884509.html

Helmut Kudrnovsky wrote

  File "C:\Users\hkmyr\AppData\Roaming\GRASS7\addons/scripts
/r.landscape.evol.py", line 509, in main
    grass.run_command('r.colors', quiet = "True", map =
netchange, rules = nccolors.name)
  File "C:\OSGEO4~1\apps\grass\grass-7.4.1\etc\python\grass\
script\core.py", line 421, in run_command
    return handle_errors(returncode, returncode, args,
kwargs)
  File "C:\OSGEO4~1\apps\grass\grass-7.4.1\etc\python\grass\
script\core.py", line 332, in handle_errors
    returncode=returncode)
grass.exceptions.CalledModuleError: Module run None
['r.colors', '--q', 'rules=c:\\users\\hkmyr\\appdata\\local\
\temp\\grass7-hkmyr-8260\\tmp3ykzyr', 'map=levol_ED_rate']
ended with error
Process ended with non-zero return code 1. See errors in the
(error) output.

it seems

https://trac.osgeo.org/grass/browser/grass-addons/grass7/raster/r.landscape.evol/r.landscape.evol.py#L509

509 grass.run_command('r.colors', quiet = "True", map = netchange, rules
= nccolors.name)

https://trac.osgeo.org/grass/browser/grass-addons/grass7/raster/r.landscape.evol/r.landscape.evol.py#L522

522 grass.run_command('r.colors', quiet = "True", map = new_soil, rules
= sdcolors.name)

that the rules fille for these 2 r.colors command aren't correctly defined
in the script.

locally changing these 2 lines e.g. to

    grass.run_command('r.colors', quiet = "True", map = netchange, color =
'viridis')
    grass.run_command('r.colors', quiet = "True", map = new_soil, color =
'viridis')

then the addons script finishes:

r.landscape.evol elev=elevation@PERMANENT initbdrk=bedrock@user1
smoothing=no prefx=levol_ outdem=elevation outsoil=soildepth number=1
statsout=D:\wd\test\log.txt

##################################################
##################################################

STARTING SIMULATION

Beginning iteration sequence. This may take some time.
Process is not finished until you see the message: 'Done with everything'
_____________________________________________________________
_____________________________________________________________
Total number of iterations to be run is 1
Iteration = 1

##################################################

*************************
Iteration 1 -- step 1: calculating slope
*************************

*************************
Iteration 1 -- step 2: calculating accumulated flow depths
*************************
Calculating runoff excess rates (uplsope accumulated cells scaled to
"flowcontrib" map

*************************
Iteration 1 -- step 3: calculating sediment transport rates (units variable
depending upon process)
*************************

*************************
Iteration 1 -- step 4: calculating divergence/difference of sediment
transport for each process and the actual amount of erosion or deposition in
vertical meters/cell/year
*************************

Running soft-knee smoothing filter...
No additional modal smoothing was requested...

*************************
Iteration 1 -- step 5: calculating terrain evolution and new soil depths
*************************

*************************
Iteration 1 -- step 6: writing stats to output file
*************************

Outputing stats to textfile: D:\wd\test\log.txt

Cleaning up temporary maps...

*************************
Done with Iteration 1
*************************

Iterations complete!

Done with everything
(Wed Sep 12 20:16:14 2018) Command finished (43 sec)

-----
best regards
Helmut
--
Sent from: http://osgeo-org.1560.x6.nabble.com/Grass-Users-f3884509.html