Spatial and Temporal Distribution Characteristics of Nutrient Elements and Heavy Metals in Surface Water of Tibet, China and Their Pollution Assessment
Round 1
Reviewer 1 Report
In this study, water samples were collected from the Tibet area to evaluate distribution and pollution levels of nutrients and heavy metals in surface water. Generally, the research topic is really interesting and comprehensively discussed. Hence, this work can be recommended for publication after a minor revision, considering the following comments:
Comment #1: Introduction section should be broadened and supported with more references (e.g., discussing reported studies on the effect of such pollution on human and animals in the area).
Comment #2: Fundamentals of the entropy value approach should be elucidated.
Comment #3: All equations in this study should be supported with the appropriate references.
Comment #4: In table 5, pH not PH.
Comment #5: Properly enriched discussion is strongly suggested on the correlation between water quality indicators and the physicochemical features of the collected water samples (i.e., the discussion should consider correlation dependency on the nature of each pollutant and the changes in pollutant’s occurring aqueous species w. r. t. the indicators).
Comment #6: Considering the topic of this research, the manuscript should be supported with author’s notions (remarks) regarding the challenges and recommendations for decision-makers concerning pollution situation in the Tibet area.
Author Response
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
This study presents interest due to the obtained results regarding the heavy metal pollution of surface waters of Tibet, China.
The paper is well structured, but it does not present all used methods. The results are well presented with representative graphic.
The aim and objectives of the study are presented in a clear and logical way.
Nonetheless, the paper lacks in novelty and originality, although it could be helpfully in the frame of the pollution issue.
Specific comments:
1. Abstract should have no more than 200 words; you have 316 words. Please check the Journal’s guideline.
2. In the Abstract please remove the abbreviations, in order to be more understandable for the readers.
3. You did not mention China in the Abstract; there is no correlation to the title. Please provide data or change the title (e.g. “….surface water of Tibet, China”).
4. Please add a comma between the two methods mentioned in the Keywords list.
5. Chapter 2.2. Data Collection – please replace the http address with the specific name and year of the article.
6. Related to the previous comment, please add the citation into the Reference list.
7. In the Data Collection section please add explanation for the abbreviations (chemical indicators).
8. Why did you choose 41 cross-sectional monitoring points to study and why the mentioned 7 cities?
9. In the Materials and Methods section please add a chapter regarding the applied analytical methods for the chemical indicators.
10. It is mandatory to have data regarding the quality assurance of the used methodology applied for determination if the chemical indicators. Please provide the specific data (e.g. recovery, accuracy, precision, repeatability…).
11. Please add the water standard GB3838-2002 in the Reference list.
12. You can add some data to compare your results with the results from other studies, giving more international flavor.
13. Please add a Conclusion section!!!!!!!!
Comments for author File: 
Comments.docx
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Round 2
Reviewer 2 Report
This work was visibly improved, and all suggestions were implemented.
Still, the originality and novelty are poor indicated/highlighted,
nonetheless work was put in the manuscript and the result are significant for the community.
Good luck!
Author Response
请参阅附件。
Author Response File: Author Response.pdf
