August 31, 2018
Dear Dr. Wang,

Thanks for providing responses to the two reviewers of your ms “Impacts of anthropogenic inputs on the hypoxia and oxygen 
dynamics in the Pearl River Estuary”. I consider that most responses are satisfactory, for which I invite you to submit a revised version that considers your responses. Of those, the one that I consider that need further explanation and clarification in the next version is:

R2. “As shown in Figure r2, the year 2006 is a wet year with the total river discharge over 10,000 m3 s-1 and the monthly river discharges during July-August over 20,000 m3 s-1. More justifications on why choosing July and August 2006 please see our response to the comment 1. ”
In addition of what you expressed in your answer, your approximation will have to consider a comparison all data from July with those of August between 1999 and 2010.

Sincerely yours
Silvio Pantoja
Associate Editor