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gusbacos / SuPy---Testing

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Conductance settings #5

Open gusbacos opened 3 years ago

gusbacos commented 3 years ago

I have some questions regarding assigning reasonable conductance values.

1. SUEWS_conductance.txt

I have created a code (700) in SUEWS_Conductance according to g1-6 in Omidvar et al. 2020

However, i do not know if i am understanding the other parameters correctly:

What does S1 and 2 mean?

10 S1 MD A parameter related to soil moisture dependence [-]
11 S2 MD A parameter related to soil moisture dependence [mm]

i read at SUEWS.readthedocks , but i cant seem to find any documentation on what it acutally is. My best guess so far is Canopy water storage capacity noted as Si in Omidvar et al (2020), but i am not sure that is the case. And if so, what is the difference between them?

Also, when using 13.8 as G1, I get following error messege from using sp.check_state()

g1 should be between [0, 10] but 13.8 is found at 0 at index 1

1 2 3 4 5 6 7 8 9 10 11 12 13    
Code G1 G2 G3 G4 G5 G6 TH TL S1 S2 Kmax gsModel    
100 16.4764 566.0923 0.2163 3.3649 11.0764 0.0176 40 0 0.45 15 1200 1    
101 23.53 104.4 0.0812 9.44 18.35 0.081 40 0 1.08 69.7 1000 1    
102 5.5387 36.3971 0.1568 4.0035 14.4269 0.0025 40 0 0.45 15 1200 1    
103 3.212 120.275 0.182 0.666 16.067 0.0348 55 -10 4.176 0 1200 1    
104 3.5 200 0.13 0.7 30 0.05 55 -10 5.56 0 1200 1    
200 3.5 200 0.13 0.7 30 0.05 55 -10 5.56 0 1200 1    
700 13.8 104.47 0.79 0.59 37.24 0.049 55 -10 5.56 0 1000 2 ! Grass Omidvar et al. 2020
-9                            
-9                            

2. Conductance in Siteselect.txt and SUEWS_veg.txt

As only one conductance code is present I assume that all surfaces are given the same conductance as specified in corresponding code in SUEWS_conductance.txt, is that correct?

Furthermore, in SUEWS_veg.txt, and also _non_veg MaxConductance is present.

22 MaxConductance MD The maximum conductance of each vegetation or surface type. [mm s-1]

Is MaxConductance in this case the Same as G1 in SUEWS_conductance? And should MaxConductance for let say, Evergreen Trees in _veg correspond to the value stated in G1, or should that be a value more reasonable to the surface type?

sunt05 commented 3 years ago

I have some questions regarding assigning reasonable conductance values.

This issue is in fact quite tricky and I guess a detailed answer might still confuse you. So, below I only give you some brief answers and I'll update you on this probably next Wednesday as I'm also working on getting proper values for all non-urban surfaces: hopefully I may give some values that you can just use.

1. SUEWS_conductance.txt

I have created a code (700) in SUEWS_Conductance according to g1-6 in Omidvar et al. 2020

However, i do not know if i am understanding the other parameters correctly:

What does S1 and 2 mean?

10 S1 MD A parameter related to soil moisture dependence [-] 11 S2 MD A parameter related to soil moisture dependence [mm] i read at SUEWS.readthedocks , but i cant seem to find any documentation on what it acutally is. My best guess so far is Canopy water storage capacity noted as Si in Omidvar et al (2020), but i am not sure that is the case. And if so, what is the difference between them?

No, they are NOT water storage capacity but a scaling factor used in conductance parameterisation with respect to soil moisture.

Also, when using 13.8 as G1, I get following error messege from using sp.check_state()

g1 should be between [0, 10] but 13.8 is found at 0 at index 1

Just skip the check_state part if no other issues are reported.

                     

2. Conductance in Siteselect.txt and SUEWS_veg.txt

As only one conductance code is present I assume that all surfaces are given the same conductance as specified in corresponding code in SUEWS_conductance.txt, is that correct?

yes, conductance are given in a lumped sense: one conductance for one whole grid.

Is MaxConductance in this case the Same as G1 in SUEWS_conductance? And should MaxConductance for let say, Evergreen Trees in _veg correspond to the value stated in G1, or should that be a value more reasonable to the surface type?

No, they are different and a product of both is used in the calculation. G1 is designed to be a scaling factor for LAI in the conductance calculation while Gmax, MaxConductance, is associated with vegetation types.