Analysing bunch of data

#1
Hello!

I have a question about statistical testing on hydrological statistics - I am trying to find a correlation on the link between a multitude of values and arguments (like precipitation and number of cases, etc). My question is what kind of test should be used to find a connection between different arguments. For example, I need to find a connection between number of flash flood cases and the size of the basin (file attached). What kind of test should be used, assuming there is no normal distribution and can I use the same on other such comparisons?
 

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#4
Plot the relationships. If they look linear, use Pearson correlation and the corresponding t-test. Otherwise use Kendall's tau and Spearman's rho as well as the associated tests.