Dear authors,

the review has been overall positive and encouraging. Both reviewers found the manuscript to be of big interest, but they have several comments that can help to improve the manuscript, mainly on the structure and writing. Please consider all of these comments and provide a reply on how you addressed these one by one. Please take in mind that your work should be reproducible, hence that you need to provide a description of all model-steps, including all inputs, model-set up (with user choices on methods) and calibration.

Dear authors,

Your paper presents a very interesting mix of field data and modeling, and the topic is a critical environmental issue in southeast Asia.

The reviewers are pleased with your revised version, which improved the paper significantly which allow us to accept the manuscript. However, please upload a final version taking into account some more improvements as provided by reviewer 1.


Additional feedback from reviewer 1:
I commend the authors regarding their efforts to revise and improve the manuscript in response to the first round of reviewer’s comments. I think you have succeeded in addressing many of the weaknesses that were present in the original draft. The revised manuscript also incorporates very insightful field study data in combination with the modeling results in a way that is very unusual within the existing SWAT-related literature. I did insert sever edits and other relatively minor suggestions in the text, with the goal of further improving some aspects of the manuscript.