Specifications and Accuracy of Rainfall Forecast Required for Pre-Release at Multi-Purpose Reservoirs in Japan
Round 1
Reviewer 1 Report
Please see attached report
Comments for author File: 
Comments.docx
Author Response
Please see the attachment.
Author Response File: Author Response.docx
Reviewer 2 Report
1. Authors should organize the Abstract section and justify the main novelty of this study.
2. In introduction section authors should add few more reference from under-developing countries.
3. Abbreviations must be explained at the first use.
4. In materials and method section line 104 to line 105 authors should replace "Chapter" with some other appropriate word.
5. What does the authors want to conclude from Figure 5?
6. The conclusion section is too lengthy and it can be revised.
Author Response
Please see the attachment.
Author Response File: Author Response.docx
Reviewer 3 Report
The manuscript of the authors from Japan is concerned with "Specifications and accuracy of rainfall forecast required for pre-release at multi-purpose reservoirs in Japan”.
Thank you for the opportunity to review this useful and actual research study.
The manuscript presents necessity of pre-release from reservoir before flood to enhance flood control capability on the base of rainfall forecast.
This submitted article could be with the aim and scope of the MDPI journal Water; Section: Water Resources Management, Policy and Governance,
https://www.mdpi.com/journal/water/sections/Water_Resources_Management_Policy_Governance
New Challenges in the Planning, Design, Construction and Operation of Reservoirs in the Context of Climate Change
https://www.mdpi.com/journal/water/special_issues/Design_Construction_Operation_Reservoirs
• Abstract & introduction: These two parts are focused on the paper's main aim and the new contributions of authors to the state of the art. The abstract with keywords very effectively summarizes the manuscript. The key objective for the authors is to show the specifications and accuracy of rainfall forecast required for pre-release by using observed rainfall data as tentative rainfall forecast with some processing including partial use, upscaling, multiplying and shifting. The study analyzed situations at many multi-purpose reservoirs nationwide in Japan under long periods of past rainfall.
• Materials & methods: Based on the existing research, the authors quantitatively showed rainfall forecast required for pre-release at 326 multi-purpose reservoirs in Japan. In the analysis, pre-release was simulated based on tentative rainfall forecasts made of observed rainfall data for 17 years with some processing. Then, outputs were evaluated from two risks: not avoiding emergency spillway gate operation and no recovery of water use capacity. It is clear how all of the data were obtained. This section gives readers enough information so that they can use the study for other areas. The authors thing also at risk analysis and possible errors.
• Results & discussion: The data are well-controlled and robust and results are well-presented with relevant and current tables, figures, and references. Results are concluded for five elements: characteristics of situation requiring pre-release, required forecast length and spatial resolution, required accuracy of rainfall amount and position of rainfall zone.
Results section were obtained and the methods used to analyze the data are progressive and scientific sound. With some adaptation, this described methodology of could be used more generally not only for the selected area of the world.
I have only one comment for improving of manuscript before publishing:
- It is not necessary to numbering key words.
Author Response
Thank you so much for your positive and detail comments and assessments. We came to have confident for this achievement by review from perspective of another researcher in another country. Thank you for your indication. We removed the numbering.
Round 2
Reviewer 1 Report
Your manuscript is worth publishing. However, there are lots of grammatical errors that have to be corrected. I would highly suggest getting an editorial check for your manuscript.
such as "few information" must be replaced by "little information" or inadequate information"
Therefore, the rainfall forecast required for pre-release at 326 multi-purpose reservoirs in Japan was showed quantitatively. "showed" must be replaced by "shown".
Author Response
Thank you for your additional comments.
We got MDPI English Editing service.
We checked all of the editions and revised some editions for retaining original meaning.Of course, we revised two grammar errors you picked up.
Thank you so much for your cooperation.
