Online lecture 05 | explore the "sponge +" new mode of urban old residential area transformation

Under the epidemic situation in 2020, in order to resolutely implement the decision and deployment of the Party Central Committee and the State Council, help win the battle of epidemic prevention and control, fight the battle of ecological environment prevention and control, practice the responsibility and mission of improving ecological environment and building a livable home, Zhongguancun green wisdom sponge city ecological home industry alliance jointly launched a series of public welfare live lectures on water ecology with relevant organizations,

Under the epidemic situation in 2020, in order to resolutely implement the decision and deployment of the Party Central Committee and the State Council, help win the battle of epidemic prevention and control, fight the battle of ecological environment prevention and control, practice the responsibility and mission of improving ecological environment and building a livable home, Zhongguancun green wisdom sponge city ecological home industry alliance jointly launched a series of public welfare live lectures on water ecology with relevant organizations.

Since the launch of the lecture, the number of online viewers has reached more than 20000, which has aroused great concern and repercussions in the industry, as well as people's thinking on ecological design! We will invite experts from the cross-border community to share the strength of cross-border ecological management in succession!

We welcome the active participation of government departments, project owners, scientific research institutes, planning, design and construction units to contribute to promoting ecological environment construction and guarding our homeland!


Mr. Gao Junbin, vice president of research and development of Beijing Taining Kechuang Rainwater Utilization Technology Co., Ltd. and Mr. Wang Hongwei, deputy chief engineer of Zhongguancun sponge City Engineering Research Institute Co., Ltd., were invited to share with each other in detail the actual cases from the policy interpretation of the old residential area to the technical points of sponge community construction, and to describe how to infiltrate into the process of the old community reconstruction Through sponge thinking. Let's listen to the senior corporate guests in the field of sponge city construction to share with us!

Gao Junbin first introduces the relevant policies, development background and the key points that need to be paid attention to in the context of the transformation of old residential areas, including the comparison of the requirements of various places on the transformation, Taking Jiangxi Province as an example For example, Beijing, Xiamen and other places; specific relevant standards, focusing on the urgent need for the specification and guidance of technical management standards; comprehensive renovation work plan of old residential areas and construction content from 2018 to 2020, and detailed interpretation of comprehensive transformation technology of urban old residential areas.

Facing the current situation and problems of the old community reconstruction, the sponge city construction concept has been highly concerned in the transformation of the old community. Through specific case analysis, Gao Junbin introduced in detail how to use sponge city technology to solve the problems of vertical transformation and intelligent water system, as well as how to combine with the greening of community. Through the case analysis of sponge facilities application, the suitability and necessity of its construction were fully illustrated.

Finally, based on the transformation experience of Guangzhou, Gao Junbin analyzed the development direction and ideas of the old community in the future. We should take residents as the main body, community led, government led, and all parties support. Finally, build a safe, healthy, energy-saving and environmental friendly green ecological wisdom community. At the same time, some research and development achievements of Taining sponge city construction in recent years are shared, and the specific suitable technologies and products for drainage, water storage, ground pavement, rainwater collection and other aspects are introduced in detail.

In the early stage of the project, Mr. Wang jiarou and Mr. Wang jiarou's plan for the renovation of the city were analyzed.

The community is located in Huairou District, Beijing, with the overall goal of building a green sponge demonstration project. The purpose is to improve the landscape, improve the function, and form a stormwater management system integrating water collection, water storage and water use. Mr. Wang analyzed the underlying surface, vertical, drainage and owner feedback. After confirming the type of underlying surface of the site, the underlying surface of Garden Road, paved ground, parking space and greening part of the community were investigated and analyzed. The vertical part focuses on the slope value within the site. According to the feedback from the owner, there are big problems in the drainage system. To sum up, it can be summarized as four key problems to be solved: greening, pavement, water landscape and rainwater system.

According to the current situation of the community and the overall goal, the principle of sponge scheme design is to reasonably arrange lid facilities and give full play to the functions of "infiltration, stagnation, storage, purification, utilization and discharge". Mr. Wang explained the method of rainwater organization and sorting, and explained the design of lid from the overall to the node. The solution measures were corresponding to the current problems one by one, and targeted transformation was carried out, so that the functional, ornamental and even later management and maintenance of the community were improved comprehensively.

Finally, Mr. Wang analyzed the index accounting data and investment estimation of the project construction, emphasized the cost control in the reconstruction of old residential quarters, and fully utilized the existing facilities to achieve the best cost control.

Selected interaction

Q: As far as North China is concerned, a large amount of precipitation in a year is concentrated in summer, and the other three seasons are relatively dry. Is there any difference between the construction of sponge cities in North China and that in the south?

Wang Hongwei: as far as North China is concerned, the rainfall in July, August and September each year accounts for more than 70% of the whole year. Now the better thing is that the relevant design of sponge city is more perfect, no matter from the national standard atlas or the local standard. Therefore, from the design, we can determine which of the five regions the project belongs to, and strictly follow the index value and range of the annual total runoff control rate of different regions. Because these data are based on 30 to 50 years of decline

The first phase of water × landscape online public welfare live broadcast ushered in more than 5000 people watching, which caused great concern and repercussions in the industry, and also caused people to think about ecological design! This period of online activities of river basin × landscape has been successfully completed. In the future, we will invite experts from the industry to share their insights, strive to break the cross-border integration of cross disciplines, and jointly promote the comprehensive management of China's ecological environment and build a harmonious and livable home.

We welcome the active participation of government departments, project owners, scientific research institutes, planning, design and construction units to contribute to promoting ecological environment construction and guarding our homeland!

Review of the second lecture

Mr. Wei Jun, vice president of the Ecological Environment Engineering Institute of East China survey, design and Research Institute of China Power Construction Corporation, and Mr. Zhang Li, deputy chief engineer of China design group and President of Shenzhen Branch, were invited to explain the key points of river and lake water system management with high ecological sensitivity from the perspective of basin environment and landscape evolution, including rainwater, sewage and water supply The problem of the water system also involves the connection of ecology, landscape, culture and other fields. The participants are deeply inspired to think and discuss the problems from different perspectives.

Wei Jun

Interpretation of the largest domestic EPC project of water environment treatment -- Maozhou river treatment practice in Shenzhen

Wei Jun first introduced the water regime of Shenzhen in general. He pointed out that due to the strong human intervention in the water cycle system in the process of urbanization, the water cycle has been transformed into a "natural society" dual water cycle. In addition, Shenzhen is also faced with various problems, including the occupation of the space within the blue line of the river, the interweaving of flood, tide and waterlogging in extreme weather, and the difficulty in controlling point and non-point source pollution.

In order to explore the methods to solve the problems, we need to trace the source one by one. Wei Jun made a detailed analysis on the problems existing in the treatment of Maozhou River, and put forward the feasible treatment measures from various angles, such as sewage stripping and transfer, box culvert silting, etc. the plant, network, river and source should be corresponding to water and bank treatment, so as to completely eliminate the black odor. And make full use of the principle of sponge City, combined with its own characteristics to complete the organic integration treatment of non-point source pollution.

Schematic diagram of sewage outlet treatment

From specific measures to institutional concepts, Wei Jun further combed the innovative governance model of watershed planning. From the perspectives of attitude, planning direction, leadership mechanism, combat mode and work focus, Wei Jun introduced the governance basis of various planning systems of water governance, and shared the planning key points and top-level design principles in an easy to understand way.

General idea chart of watershed management

Finally, Wei Jun showed the achievements of water regime management in Shenzhen, and introduced the changes and requirements of water management in the future. It emphasizes the important role of human to water environment, and thanks the builders.

Zhang Li

River system planning and ecological planning

Zhang Li first put forward the problems of river system and the collaborative needs of ecological planning of river basins. She believed that many ecological land functions overlapped and could be used intensively. Therefore, she proposed a multi-disciplinary collaborative ecological planning model, and proposed that watershed water system planning was the basis of ecological planning. Combining with the practical steps of ecological river planning and design, she compared the river sections before and after planning to explain the key points, and showed the importance of water system planning step by step.

Schematic diagram of river flood control planning: a widens river channel, B builds flood storage lake.

In addition to the urban river system planning, the protection of natural rivers and wetlands is the most important. Zhang Li emphasized the concept of riverside zone. She believed that designers should pay attention to the complex function of land water interface and its ecological benefits. She suggested that on the basis of meeting the function of flood control, the meandering river channel should be kept as far as possible, and the ecological revetment should be constructed. Zhang Li pointed out that there is no need for additional drainage and purification in clear water biological system with stable biological chain, and stressed that although constructed wetland can be purified, the water discharged into the lake must be clean and cannot be expected to purify itself.

Conceptual sketch map of riverside zone

At present, the restoration of river and wetland ecological base flow mostly depends on groundwater, and some short-term solutions such as tail water purification and recharge are adopted. Zhang Li pointed out that in the long run, groundwater resources are very precious, and she hopes to supplement them from the perspective of planning. She thinks that the whole system process of rainwater should be regulated as much as possible in the planning. The connection with groundwater should be considered from the upstream, and the river base flow and water resources should be fully considered for planning. At the same time, the multi-functional mixing should be achieved as much as possible.

In terms of reducing non-point source pollution, Zhang Li analyzed the source of pollution, and introduced the water purification system of farmland non-point source pollution control. She proposed that river corridors can effectively remove pollutants and retain sediments, and gave an example of the application of constructed wetland technology in agricultural non-point source pollution control.

Schematic diagram of river base flow and water resources

Finally, in terms of biodiversity conservation, she believes that indicator species and ecology should be identified under the "patch corridor matrix" model