Hi I wanted to confirm, that upto the month of Apr the target variable is the Net Sum of (Apr - July/Jun) naturalized flow and then for next subsequent month predictions we subtract the the previous month value. Am I right?
That is not correct. For the 26 primary sites in the challenge, the target variable is always the total seasonal water supply. It is the same value for a given site in a given year, no matter the issue date. See this thread for additional discussion.
There is drainage area missing from the metadata, is it possible to update it?
The drainage area for the supplementary sites is not currently available, and we will likely not be able to provide it.