Getting high glacier melt than snowmelt in a western Himalayan catchment?

[Vishal Singh]

Hi All, 

I am getting high glacier melt than snowmelt in a western Himalayan catchment. 

In my catchment, the glacier area is around 22%, still I am getting high glacier melt (around 70% melt from glacier and 30% from Snow).

How can I control these parameters. At the outlet, I am slightly underestimating sim Q than  observed Q.

How can I improve these things in SPHY.

I am playing with lot of parameters but not succeeding. 

Kindly help me.

Thank you very much.

Regards,

Vishu

[WilcoTerink]

Are you saying you are underestimating or overestimating the observed flow?

To reduce melt from glaciers you can make DDFDG and DDFG smaller.

[Vishal Singh]

Hello Terink,

Thank you for your reply.

I have solved that problem as followed by your suggestions. 

However, I want to know the difference among SNOWFAL, SNOWFALL- CORRECTED FOR FRACTION and similarly for Glacier melt.

If I want to highlight sub-catchment wise contributions (in mm) so which variable I need to select?

I am also confused about sub-catchments and stations. I have 41 sub-catchments and 25 stations. While running the simulation, I am getting results only for the stations (e.g. for 25 numbers only)?

How can I read/get results at all 41 sub-catchments.

Please clarify me about it.

Thank you very much.

Regards,

Vishal

[WilcoTerink]

Hi,

What model version are you using? Looking at your question it seems like you are using an older model version. Tell me which version you use: https://sphy.readthedocs.io/en/latest/releases.html

The fraction was used in older versions to report the snow for the non-glacier fraction of each grid cell. This is done correctly automatically in the newer versions. Also, the subcatchment map is not used anymore in newer versions. So reporting of time-series is only done for the station locations.

[Vishal Singh]

Hi,

Thanks for the reply. Right now I am using 2.0 (first version).
Which version I should use?
Plz also tell the configuration for that versions?

So if I am using 2.0 so all outcomes are wrong or still I can use these results?

Thank you very much.
Regards
Vishal

[WilcoTerink]

If you are ok with not having to use the GUI, then it’s best to use https://sphy.readthedocs.io/en/latest/releases.html#release-2-1-1 (version 2.1.1). This has the same glacier and snow concepts as version 2.0.0. Outcomes of version 2.0.0 would still be ok, but code in 2.1.1 has some improvements.

Even better would be to use the newest release, which is 2.2.1, but that would involve more complex data preparation for initial glacier depths etc. So if you are uncomfortable with more complex data predation, then I would use version 2.1.1 instead.

[Vishal Singh]

Hi Terink,

I am getting this error.

However, the same time series data is working fine with 2.0.3 and 2.0.0.

Please help me.

Thanks

Regards,

Vishal

[Vishal Singh]

I am using now SPHY 2.1.1, Anaconda 2.7, PCRaster - 4.1.0

All things installed correctly.

Thanks

[WilcoTerink]

It looks like your config file is saved under the folder: c:\my_model\sphy_config.cfg. However, I see that all your model input files are saved under c:\Anaconda2\lib\site-packages\SPHY\ts11_sub\.

The inputdir you specify in the sphy_config.cfg should contain the path relative to where your sphy_config.cfg file is saved; i.e. if your config is saved under c:\my_model\sphy_config.cfg, and the inputdir variable is ts11_sub, then all your input files should be put under the folder:

c:\my_model\ts11_sub\

[Vishal Singh]

Dear Wilco,

Many thanks for your prompt reply. I did the same but I am not getting why it is not reading forcing data.

Please see the screenshot below:

Same forcing datasets are working fine with SPHY2.0.3.

Please help me in this regard.

Thank you very much.

Regards,

Vishal

[Vishal Singh]

Dear Wilco,

Thanks for your kind help.

I have solved all problems.

Once again thank you so much.

Regards,

Vishal