Simulation of Sudden Water Pollution Accidents in Hunhe River Basin Upstream of Dahuofang Reservoir
Round 1
Reviewer 1 Report
Combine Fig 5 and Fig 6 as Fig 5a and b. Add a separate mixing stream for better clarity. The authors studied both inorganic and organic pollution loads separately. Is it possible to study both organic and inorganic load in one go? Like many real-life situations, organic matter and inorganic solids are part of a pollution stream like the failure of dykes or sugar plants.
Table 2. just 2x2=4 combinations were applied. What is the logic of taking 50 ppm and 100 ppm COD load? In my opinion, it should be 50 ppm and 500 ppm or the ratio of maximum to a minimum should be ~4. Any comments.
Fig. 1 is not clear. Mention the direction of river flow and sampling points/fluxes are added as merging stream.
Figure 5. Check whether iron is a heavy metal as mentioned
Can a Dissolved Oxygen sag curve can be added for organic pollution. This will give a better idea about the minimum Do concentration to survive the fish.
Do a discussion first and then conclude with future work or limitations of the study.
Repetition of references.
- Ref 16 and 18 are the same.
- Refs 11 and 12 are the same.
- Ref 23 and 24 are the same.
The discussion section is poor. Improve it.
Author Response
Dear reviewer
Thank you very much for your valuable comments on our manuscript, which has been corrected according to your guidance.
Best wishes.
Miss Liu.
Author Response File: 
Author Response.docx
Reviewer 2 Report
Journal: Water
Title: Simulation of Sudden Water Pollution Accidents in Hunhe River Basin Upstream of Dahuofang Reservoir
The authors based on the known hydrodynamic conditions in the study area of the three rivers that flow into the reservoir used as a source of water for human consumption, as well as the assumed values of the concentration of Fe suspen. and COD using a mathematical model simulate the time required for contamination (suspended Fe or COD) to reach the reservoir as well as the value of the pollution concentration. A realistic possible scenario is being investigated with the aim of timely warning about the cessation of drinking water use.
The simulation results are logical and obvious with respect to water flow since advection is the main mechanism of substance transfer. Of course, the exact values of time and concentration had to be calculated.
It should be stated in the manuscript that it is surface water and that the reservoir is surface, I understood that because it would obviously be mentioned that it is reservoir underground.
My main question is how to detect that pollution has occurred. If an accident such as an explosion and the like occurs, the public is aware, but pollution can also occur if the industry does not inform the public about the act.
There are too many typographical errors in the manuscript, for example:
- a multitude of connected words
- figure and table change to Figure and Table
- line79: „reservoir is more“, not clear
- line 164: be careful in way to write measurement unit
- line 238 and 264: flow rate and concentration for 4th situation is not written correctly, 100 and 100, not 50 and 50
- line 283: cod to COD
- line 316: conclusion to Conclusion
Pay attention to the resolution of the Figs., especially 3 and 4.
The title of Chapter 4 is really strange to me, it is logical to me that it is first a discussion and then a conclusion. In my opinion, the discussion was in Chapter 3.3.4 and can be continued with the text listed in lines 337-366.
Author Response
Dear reviewer
Thank you very much for your valuable comments on our manuscript, which has been corrected according to your guidance.
Best wishes.
Miss Liu.
Author Response File: Author Response.docx
Round 2
Reviewer 1 Report
Nil
