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Comprehensive Case Study on the Ecologically Sustainable Design of Urban Parks Based on the Sponge City Concept in the Yangtze River Delta Region of China

Sustainability 2023, 15(5), 4184; https://doi.org/10.3390/su15054184

by Lifeng Ji^* and Fei Rao

Reviewer 1: Anonymous

Reviewer 2: Anonymous

Reviewer 3: Anonymous

Sustainability 2023, 15(5), 4184; https://doi.org/10.3390/su15054184

Submission received: 6 January 2023 / Revised: 19 February 2023 / Accepted: 23 February 2023 / Published: 25 February 2023

Round 1

Reviewer 1 Report (Previous Reviewer 3)

The paper should be published. It is interesting and well-written.

Just two minor remarks -

1) please consider proofreading the manuscript by the Authors themselves to eliminate minor issues

2) In table one - please consider revising the point 3 in hydrogeology

"3) Use fewer or no infiltration facilities"

Would it be possible to use a different name for infiltration facilites?

"Infiltration facilites" term is usually used to describe SUDS - sustainable urban drainage system and they should be used in sponge city

Author Response

Dear Professor,

We deeply appreciate the valuable suggestion about the manuscript (MS). Indeed, these comments are very useful for us to further improve the MS. Now we complete the revision of this work. We do hope you think this new version of the MS is satisfactory for publication.

Comments and Suggestions for Authors

The paper should be published. It is interesting and well-written.Just two minor remarks -

1) please consider proofreading the manuscript by the Authors themselves to eliminate minor issues

Response: Thanks for the comment. We invited a senior subject-area expert with relevant experience in our domain who will thoroughly re-edit the manuscript with extreme care after carefully considering your comment. Please check.

2) In table one - please consider revising the point 3 in hydrogeology

Response: Thanks for t the comments. Table 1 has been redone.

Table 1. Main Hydrological Features and Strategies in the Yangtze River Delta Region.

Influence type	Influencing factor	Key factor identification	Sponge city construction strategy and technical facility recommendations
Climatic Conditions	Climate type	Subtropical monsoon climate, four distinct seasons, mild and humid climate	1) The primary goal is stormwater management, with an emphasis on "storage and drainage" 2) Adapt measures to local conditions and consider other sponge city goals of "net and use" 3) Select suitable infiltration facilities according to the actual situation 4) Focus on the coupled “gray and green” infrastructure system 5) Adopt ecological sponge facilities, such as grass-planting ditches, wet ponds, rain gardens, and ecological floating islands.
Climatic Conditions	Rainfall	The annual precipitation is 1000–l500 mm, and the precipitation is primarily concentrated in May to August
Hydrogeology	Topography and drainage	Primarily plain, local hills, numerous lakes, the highest density of river networks in China, low-lying terrain, rich water resources
	Underground water level and soil	High water table, low soil permeability
	Water quality	The population density is high, the amount of pollution is large, and the urban water body is more black and smelly ·
Others	Natural disasters	High flood risks in summer; relatively few droughts and other geological disasters

"3) Use fewer or no infiltration facilities"

Would it be possible to use a different name for infiltration facilites? "Infiltration facilites" term is usually used to describe SUDS - sustainable urban drainage system and they should be used in sponge city

Response: Thanks for t the comments. We reviewed a lot of literature and decided that "construction" was appropriate. We have checked and revised in the full text

Again, the authors wish to thank the reviewers for their thoughtful comments and their work on our manuscript.

With best regards

Sincerely yours,

Lifeng Ji*, Fei Rao

School of Art and Design, Zhejiang Sci-Tech University, No. 2 Street 928, Hangzhou 310018, China

Reviewer 2 Report (New Reviewer)

Dear Authors,

your paper titled "Comprehensive case study on the ecologically sustainable design of urban parks in the Yangtze River Delta region of China based on the sponge city concept" deals with an interesting subject, which is within the Journal topics.

Nonetheless, there are some issues that need to be solved before granting its publication. Please check the list for details:

1- A careful English review must be done to improve the readability of the text.

2- Abstract must be clearer, stating the purpose and results clearly.

3- You need to explain the objectives of your research in a clear way.

4- Table 1 should be redone to be easier to understand.

5- I suggest to include a map of the Yangtze delta with the location of the cities included in your research. You must think about non-Chinese readers that could not know where the locations are.

6- Section 2.2.2 is not used and shown in the results section or its use is not clear enough from my point of view. Please explain it carefully.

7- There is not a discussion of results before the conclusions.

8- Please check that the conclusion section fits the abstract indications.

Best regards,

Author Response

To Reviewer 2

Dear Professor,

There are 8 items in the comment in total. With high respect to you, we would be delighted to answer your point to point as follows:

Comments and Suggestions for Authors

Nonetheless, there are some issues that need to be solved before granting its publication. Please check the list for details:

A careful English review must be done to improve the readability of the text.

Abstract must be clearer, stating the purpose and results clearly.

Response: Thanks for the comment. We carefully analyzed and re-combed the abstract and conclusion to make sure they clear. Please check the abstract and conclusions below.

Abstract: Owing to widespread urbanization, previously elastic and permeable ecological foundations are being continuously hardened, sealed, and channelized, leading to problems such as intensified urban convergence, water pollution, seasonal rain, and flood disasters. Urban parks and large green spaces, as rare large cavernous bodies in cities, can effectively address the abovementioned urbanization problems. This study holistically analyzed and discussed the current developments in the sponge city concept using several case studies of recent ecologically sustainable designs for urban parks in the Yangtze River Delta region of China. Under basic conditions of the same hydrological characteristics and considering the differences in other external conditions and the environment, sponge city construction aims to address the actual characteristics and needs of specific projects, develop applicable goal-oriented sponge city constructions, and ensure design practices around a goal-oriented method. Practical problems associated with identifying specific design features, priorities, and measures were then identified according to the project location, goals, and characteristics. Thus, this study details various goal-oriented sponge city designs and their application methods to inform future design efforts.

Conclusions

The sponge city concept represents a sustainable urban construction model that emphasizes stormwater management. Sponge cities should be constructed on an ecological and sustainable foundation. This study expounds on the sponge city concept, discusses the current state of related development, evaluates the "failures" of Chinese sponge cities at this stage, and emphasizes the iterative characteristics of the theories and practices underlying sponge city projects. In conjunction with analyzing the main hydrological characteristics of the Yangtze River Delta, this study discusses the sponge city design method based on similar hydrological characteristics. Finally, combined with the practical experience of six projects and sponge cities, the construction of sponge cities by considering locale-specific characteristics are discussed to ensure the most appropriate design by taking the design and practice of some park sponge cities in the Yangtze River Delta as examples. Overall, this study provides a reference for the construction of sponge cities in other regions with similar hydrological characteristics. However, owing to practical limitations, we primarily studied the objectives and practical measures of sponge city projects in specific areas, primarily large parks and green spaces. Subsequent relevant studies are expected to further expand the research directions in the context of city squares and roof building, among others.

You need to explain the objectives of your research in a clear way.

Response: Thanks for the comment. The main objective of this paper is to provide reference for the construction of sponge cities in other regions with similar hydrological characteristics through the theoretical methods in this paper, especially the analysis of practical projects. Both the abstract and the Section 4 have been modified. we have the results and discussion of six design cases in Section 3, and add a comprehensive analysis in line 400 to 422.

Table 1 should be redone to be easier to understand.

Response: Thanks for the comment. Table 1 have been redone below.

Table 1. Main Hydrological Features and Strategies in the Yangtze River Delta Region.

Influence type	Influencing factor	Key factor identification	Sponge city construction strategy and technical facility recommendations
Climatic Conditions	Climate type	Subtropical monsoon climate, four distinct seasons, mild and humid climate	1) The primary goal is stormwater management, with an emphasis on "storage and drainage" 2) Adapt measures to local conditions and consider other sponge city goals of "net and use" 3) Select suitable infiltration facilities according to the actual situation 4) Focus on the coupled “gray and green” infrastructure system 5) Adopt ecological sponge facilities, such as grass-planting ditches, wet ponds, rain gardens, and ecological floating islands.
Climatic Conditions	Rainfall	The annual precipitation is 1000–l500 mm, and the precipitation is primarily concentrated in May to August
Hydrogeology	Topography and drainage	Primarily plain, local hills, numerous lakes, the highest density of river networks in China, low-lying terrain, rich water resources
	Underground water level and soil	High water table, low soil permeability
	Water quality	The population density is high, the amount of pollution is large, and the urban water body is more black and smelly ·
Others	Natural disasters	High flood risks in summer; relatively few droughts and other geological disasters

5- I suggest to include a map of the Yangtze delta with the location of the cities included in your research. You must think about non-Chinese readers that could not know where the locations are.

Response: Thanks for the comment. We added Figure 1 and marked the location on the map

Figure 1. (a) Project location in the Yangtze River Delta region. (b) Geographical location of the Yangtze River Delta region in China.

6- Section 2.2.2 is not used and shown in the results section or its use is not clear enough from my point of view. Please explain it carefully.。

Response: Thanks for the comment. Indeed, we have deleted the sentences in Section 2.2.2 that are not relevant enough to this work.

7- There is not a discussion of results before the conclusions.

Response: Thanks for the comment. In fact, we have the results and discussion of six design cases in Section 3, and add a comprehensive analysis in line 400 to 422.

8- Please check that the conclusion section fits the abstract indications.

Response: Thanks for the comment. We carefully analyzed and re-combed the abstract and conclusion to make sure they fit. Please check the abstract and conclusions below.

Conclusions

Again, the authors wish to thank the reviewers for their thoughtful comments and their work on our manuscript.

With best regards

Sincerely yours,

Lifeng Ji*, Fei Rao

School of Art and Design, Zhejiang Sci-Tech University, No. 2 Street 928, Hangzhou 310018, China

Author Response File: Author Response.pdf

Reviewer 3 Report (New Reviewer)

General comment: The article tackles the sponge city concept (and related methodologies) from several case studies across the Yangtze River Delta in China, towards a sustainable planning, as a complement to the classic drainage conception (gray measures). In turn, undoubtedly, this approach can be used in other cities with similar characteristics. However, there are other some observations:

Methods:

· Line 141: “…stormwater problem lies on the…”.

· Line 231: “For example, priority can be given to grass planting ditches, wet ponds, and ecological floating islands.”. This depends on space restrictions.

· Line 234: “Doing so will providing…”, instead “Doing thus will provide an environmental foundation…”

Results:

· Section 3.2, Siyang case study. From line 271 to 278 there is abuse of “should be” making it hard to follow. Consider rephrasing to clarify.

· Section 3.3, Yongkang three revers case study. It is recommended to show a cross sections including the hidden and receding levees for flood control. Also, in figures 2 and 3 please indicate with arrows the different elements described earlier.

· Section 3.4, Yongkang Tower Hill Park case study. Line 345. Is there any measure for sediment management between the reservoir and the river? Please explain.

· Section 3.5, Taicang Qiputang Ecological Park case study. Line 380: it would be better to justify why a subsurface flow wetland is more expensive than horizontal flow wetlands. Same in section 3.6, line 380.

Conclusions:

Line 409: In general, it is not clear the connection between what was analyzed about hydrology and the nature-based solutions described in each case study. Please clarify in section Results.

One of the main drawbacks or missing points that could lead to recommendation is that the present paper focused only on case studies where parks or large green areas were used. The performance of other blue-green solutions such as green trenches, permeable pavements, green walls or roofs should be explored for further research.

Author Response

Dear Professor,

There are 9 items in the comment in total. With high respect to you, we would be delighted to answer your point to point as follows:

Comments and Suggestions for Authors

Comments and Suggestions for Authors

Methods:

Line 141: “…stormwater problem lies on the…”.

Line 231: “For example, priority can be given to grass planting ditches, wet ponds, and ecological floating islands.”. This depends on space restrictions.

Response: Thanks for the comment. We have corrected this careless expression. “For example, if space conditions permit, grass-planting ditches, wet ponds, and ecological floating islands should be prioritized.”

Line 234: “Doing so will providing…”, instead “Doing thus will provide an environmental foundation…”

Response: Thanks for the comment. We have modified it.

Results:

Section 3.2, Siyang case study. From line 271 to 278 there is abuse of “should be” making it hard to follow. Consider rephrasing to clarify.

Response: Thanks for the comment. We have modified it. Please check in Section 3.2.

Section 3.3, Yongkang three revers case study. It is recommended to show a cross sections including the hidden and receding levees for flood control. Also, in figures 2 and 3 please indicate with arrows the different elements described earlier.

Response: Thanks for the comment. We added the cross sections of the concealed and receding levees. In Figures 2 and 3, arrows represent the different elements described earlier.

Section 3.4, Yongkang Tower Hill Park case study. Line 345. Is there any measure for sediment management between the reservoir and the river? Please explain.

Response: Thanks for the comment. We have modified it. The plan is to divert water from Yongkang River to the front pool of the reservoir, and after multiple stages of precipitation, enter the main water body of the reservoir.

Section 3.5, Taicang Qiputang Ecological Park case study. Line 380: it would be better to justify why a subsurface flow wetland is more expensive than horizontal flow wetlands. Same in section 3.6, line 380.

Response: Thanks. We have modified it. Please check in Line 373-377. “Notably, because of the hydraulic load of subsurface flow wetland, the difficulty of bed filling, and later maintenance, the cost is relatively high, and considering the large area of the project, the scheme discussed here abandons the expensive and intensively maintained subsurface flow wetland design and focuses on more natural, ecological, and horizontal flow wetlands.”

Conclusions:

Line 409: In general, it is not clear the connection between what was analyzed about hydrology and the nature-based solutions described in each case study. Please clarify in section Results.

Response: Thanks for the comment. Through the elaboration and analysis of several typical design cases with the same hydrological characteristics and different external conditions and environmental differences, this paper presents the goal orientation and practical results of each project which are more suitable for its own characteristics according to the actual characteristics of specific projects. At the same time, we have the results and discussion of six design cases in Section 3, and add a comprehensive analysis in line 400 to 422. We carefully analyzed and re-combed the abstract and conclusion to make sure they fit. Please check the abstract and conclusions below.

Conclusions

Response: Thanks for the comment. I couldn't agree with you more. This paper does focus only on case studies using parks or large green Spaces. Two sponge facilities, "green ditch and permeable road surface", are added in appropriate places in the article, as shown in Table 1 and Part 3.5. "Green walls or roofs" is considered to be relatively small in parks or large green Spaces, so we consider discussing it in another article, and hope that subsequent relevant studies can further expand the research direction, such as city squares, building roofs and other directions.

Again, the authors wish to thank the reviewers for their thoughtful comments and their work on our manuscript.

With best regards

Sincerely yours,

Lifeng Ji*, Fei Rao

School of Art and Design, Zhejiang Sci-Tech University, No. 2 Street 928, Hangzhou 310018, China

Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report (New Reviewer)

Dear Authors,

I'd like to congratulate you for the improvement of your paper. Nevertheless, one minor detail needs improvement. Figure 1 citation within the text was not found so you need to include it somewhere. Furthermore, the quality of figure 1 is not sufficiently high so I suggest to change it for a figure with higher resolution and where the locations discussed in the text could be better seen.

Best regards,

Author Response

Dear Professor,

Here we must express our deep gratitude firstly to you for spending time to evaluate the publication of this manuscript and the constructive advice for revision, which potentially play an important role in enhancing the manuscript quality. After carefully reading up on the comments from you, we revised the manuscript over the past few days. In the following, we are willing to list the details you are concerned with our high respect.

Dear Authors,

Best regards,

Authors’ answer: Thank you for your comments. We rechecked the quality of the figures in the manuscript and improved the resolution of Figure 1. We also added the Figure 1 citation in line 226. Please check it.

Again, the authors wish to thank you for their thoughtful comments and their work on our manuscript.

With best regards

Sincerely yours,

Lifeng Ji, Fei Rao

This manuscript is a resubmission of an earlier submission. The following is a list of the peer review reports and author responses from that submission.

Round 1

Reviewer 1 Report

The review is organized in two parts: 1) structure, methods and conceptual discussion, 2) specific formal issues

1) structure, methods and conceptual discussion

An overall discussion of the sponge city concept should be presented, eventually with an emphasis on the differences regarding the other listed concept (LID, SCM, SUDS, WSUD).

The reference frame is lacking a geographically diversified approach, limiting itself to authors engaged in the sponge city concept. The argument would benefit from consistent knowledge on the topic, even if it comes under different conceptual umbrellas and locations.

Point “1.3. Interdisciplinarity and Complexity of Sponge City Engineering Systems” is rather generic and redundant, as it only acknowledges a general requirement of all urban planning approaches, without clarifying the distinctive features and mechanisms through which interdisciplinarity and complexity are dealt.

The problem definition is inadequately placed in the text. For example, a general problem statement is presented as an introduction to the Huzhou case studies (lines 154-169). Eventually, it would fit better in a introductory section. Other general references of the hydrological management of urban development (194-202) would better fit in the conceptual discussion.

All of the case studies are parks, which brings a need to specifically address the green structure as a systemic component of urban spaces. The general discussion on sponge cities emphasizes issues that are clearly less relevant for park design, such as the grey ‘piped’ urban networks. On the other hand, issues of biodiversity, vegetation and water management would be relevant.

The methods section (2) is very confusing, mixing general characteristics of the site (2.1) and comments from literature review (2.2). The methods used in the study are only broadly described in lines 142-145.

Each case is presented using different criteria and even text styles, mixing general principles with specific description. Globally, there is a need of further systematization for the description, analytical and resulting discussion of each case study.

2) specific formal issues

Line 65-67 is enigmatic when it refers to “trillions”: “Some researchers have opined that simply integrating various technologies and processes 65 for the management of wastewater, water supply, and rainwater into a single decision 66 system can result in a vast pool of options numbering in the trillions.”

Line 94. Clarify ‘modern urban development’. The claim that “grey system is more efficient, requires less land, entails lower costs, requires 96 only basic technology, and is easily maintainable” is highly debatable. Such claim seems contradictory with the general argument.

The source of the quotation in lines 108-109 should be referenced.

The source of the images is unclear, despite the information of ‘acknowledgments’ section.

Clarify “traditional design” and “traditional urban construction” (line 173). The time frame for this statement would help the international audience.

Images are an important part of a research paper. Their graphical consistency (i.e. legends, readability, layout of presented elements) and their analytical organization are important for a well-structured discussion not only for on each case’s contribution, but also for the global argument of the study. A framework of graphical analysis would help, for example, by consistently using plan, layered systems and site photos for every case. The analytical layers (when used) should be referenced and discussed in the text.

Author Response

To Reviewer #1,

Dear Professor,

There are 7 items in the comment in total. With high respect to you, we would be delighted to answer your point to point as follows:

Comments and Suggestions for Authors

The review is organized in two parts: 1) structure, methods and conceptual discussion, 2) specific formal issues

1) structure, methods and conceptual discussion

An overall discussion of the sponge city concept should be presented, eventually with an emphasis on the differences regarding the other listed concept (LID, SCM, SUDS, WSUD).

Response: Thanks for the comments. In Section 1.1, we add the concept, origin and characteristics of sponge city, as well as the relationship with LID, SCM, SUDS, WSUD and other relevant theories. Please check it.

Response: Thanks for the comments. We have improved the methodology section and added section 2.2 to provide a comprehensive introduction to design principles and goal orientation. Our work is to provide reference for the design of urban parks in areas with similar hydrological environment to the middle and lower reaches of the Yangtze River, such as the Pearl River Delta region of China with rainy, river network and low groundwater level, as well as similar coastal areas in other countries. Please check it.

Response: Special thanks to you for your good comments. We have removed section 1.3 from the revised manuscript. Please check it.

Response: Special thanks to you for your good comments. We reconstructed the structure in the revised manuscript according to your comments. Specifically state the two issues you mentioned in sections 2.2.1 and 2.2.2 for a clearer description. Please check it.

Response: Thanks for the comments. We have added in section 3.3 the relevance of sponge city to the general discussion of park design, reducing the description of grey city pipe network systems. In addition, section 2.2.3 (2.2.3 Habitat and Biodiversity) has been added. Please check it.

Response: Thanks for the comments. We have reconstructed section 2, specifically reorganized the analysis methodology and moved some literature reviews to section 1.

Response: Special thanks to you for your good comments. General principles were stripped from the case introduction, and we classified the cases according to the core goal orientation. The number of representative cases was reduced from 6 to 4, and each case was systematically analyzed and discussed. For details, please see section 3.

Again, the authors wish to thank the reviewers for their thoughtful comments and their work on our manuscript.

With best regards

Sincerely yours,

Fei Rao

School of Art and Design

Zhejiang Sci-Tech University

Hangzhou 310018, China

Email: [email protected]

Reviewer 2 Report

1. Limitation of your study
2. Have you given weights to any of the parameters?
3. Which model is used?
4. What is the length of data?
5. Any missing data in your study?
6. Give citation wherever required in the MS
7. Innovativeness and novelty is missing in the paper
8. How the sustainability impact in your study?
9. Conclusion is vague - Rewrite it as per work carried out
10. Grammar should be checked before submitting revised version of paper.

Author Response

To Reviewer #2,

Dear Professor,

There are 8 items in the comment in total. With high respect to you, we would be delighted to answer your point to point as follows:

Comments and Suggestions for Authors

Limitation of your study

Response: Thanks for the comments. The scope of this study is relatively limited to the urban park landscape and sponge city, and the specific projects are mostly concentrated in the Yangtze River Delta region. The purpose of this study is to provide reference for cities with similar regional characteristics in coastal areas.

Have you given weights to any of the parameters?

Response: Thanks for the comments. Our current study did not give weights to any of the parameters. Your comments will provide very helpful guidance for our subsequent research.

Which model is used?

Response: Thanks for the comments. Our work mainly referred to the technical guidelines for sponge city construction in China and some local design guidelines.

What is the length of data?

Response: Thanks for the comments. The data was collected by our design team on the spot and obtained from China hydrological information network: http://swgl.mwr.gov.cn/ Please check it.

Any missing data in your study?

Response: Thanks for the comments. We have improved the missing data and data sources in the revised manuscript in section 2 and 3.

Give citation wherever required in the MS

Response: Thanks for the comments. We have re-examined the missing references in the revised manuscript. Please check it.

Innovativeness and novelty is missing in the paper

Response: Special thanks to you for your good comments. We have added analysis methodology in section 2.2 and combined with practical cases to explain that different projects formulate different target orientations according to the current conditions, and elaborate specific applicability methods and implementation measures, so as to provide new ideas for the design of urban parks under similar hydrological conditions in the world.

How the sustainability impact in your study?

Response: Thanks for the comments. We have strengthened the concept of sustainable development in the revised manuscript. Specifically, sponge city theory is a branch of relevant theories of sustainable development, mainly focusing on the sustainable development and recycling of urban rain and flood.

Conclusion is vague - Rewrite it as per work carried out

Response: Thanks for the comments. Based on your comments, we have rewritten the conclusions to ensure that we can clearly summarize our work. Please check it.

Grammar should be checked before submitting revised version of paper.

Response: We commissioned senior academic experts to edit our manuscript again to avoid grammatical errors. The editing certificate is attached with the revised manuscript. Please check it.

Again, the authors wish to thank the reviewers for their thoughtful comments and their work on our manuscript.

With best regards

Sincerely yours,

Fei Rao

School of Art and Design

Zhejiang Sci-Tech University

Hangzhou 310018, China

Email: [email protected]

Reviewer 3 Report

The subject is relevant and very interesting. The paper is well-written. I think it would be beneficial to develop the paper.

I would recommend, if possible to provide more details about the projects wich are presented or to choose one of them and discuss it more in-depth.

What I would recommend is to choose one of the options:
1) Compare the examples of parks using a common frame - e.g. methods of stormwater retention, natural solutions used, etc.
Present the results in a legible manner, maybe using a table, graphics, etc.
2) Choose one of the parks and present it in depth in the second part of the paper.
Focus on the methods of stormwater retention, natural solutions used, etc.
Provide historic background, etc.

I hope this helps the Authors to better present the results of their research.

What would be beneficial to scholars is to present more details, so that the examples of good practice could be used in other parts of the world, i.e. to apply natural based solutions more widely.

Author Response

To Reviewer #3,

Dear Professor,

With high respect to you, we would be delighted to answer your point to point as follows:

Comments and Suggestions for Authors

The subject is relevant and very interesting. The paper is well-written. I think it would be beneficial to develop the paper.

I would recommend, if possible to provide more details about the projects wich are presented or to choose one of them and discuss it more in-depth.

Response: Special thanks to you for your good comments. The article has been greatly adjusted, such as improve the framework of analysis methodology in Section 2.2, and simplify the number of cases from 6 to 4, and conduct systematic analysis and discussion on each case, especially on the discussion and details of natural solutions in Section 3.

Again, the authors wish to thank the reviewers for their thoughtful comments and their work on our manuscript.

With best regards

Sincerely yours,

Fei Rao

School of Art and Design

Zhejiang Sci-Tech University

Hangzhou 310018, China

Email: [email protected]

Round 2

Reviewer 1 Report

The revised version meets the fundamental issues raised in the first review.

I would like to thank the authors for their commitment and improvement.

Reviewer 2 Report

revision is appropriate

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Comprehensive Case Study on the Ecologically Sustainable Design of Urban Parks Based on the Sponge City Concept in the Yangtze River Delta Region of China

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