search

DHI-GRAS / forward-et

Evapotranspiration model for FORWARD project :ear_of_rice:
0 stars 0 forks source link

Figure out constraint #9

Open buwuyou opened 6 years ago

buwuyou commented 6 years ago

Tricky one, need Zhang paper.

gmendiguren commented 6 years ago

The soil mositure constrain is derived from the paper from Morillas that I attach you here. In it is also explained the methods to estimate it, first using Zhang and later the fdrying. Section 2.2 Methods for f estimation

Morillas_et_al-2013-Water_Resources_Research.pdf

buwuyou commented 6 years ago

What should be the fPAR_max when calculating the plant moisture constraints? fPARmax = np.load(folder + '\\Data\\fPAR_max_Andalucia.npy')

How to get the daily soil equilibrium evaporation rate? Eq = np.load(folder + '\\Data\\EQ_All_Andalucia_new_.npy')

And is the rainyday consisit of the cumulative number of rainy days (Pi>Pmin=0.5 mm day-1)? RainyDay = np.load(folder + '\\Data\\Rainyday_Andalucia_1100m.npy')

gmendiguren commented 6 years ago

Hi Xiaoye, I get you back thursday with the response. We have a project meeting tomorrow and Wednesday and I am not with much time to prepare it ;-) Also in case there is any change in the meeting regarding the way we are doing the ET model we can save future changes. I hope is ok.

buwuyou commented 6 years ago

No pressure;) Just glad to tell you guys that the contraints part have been almost implemented. When info completes we can finalize it. The next challenge, which I've spent some time already, is to interpolate different datasets to daily frequency. And reconstruct the UI accordingly. The difficulty lies in that GEE has special image structure controlled by date. We need to go round with DOY and create a new image collection for those which is not in daily frequency.

I'm using CHIRPS and we mentioned last time to check a combination TRMM and GFS. I just note it down here as a task.