The population aggregation and increasing construction land due to urban expansion will affect the supply and distribution of critical ecosystem services in cities. Environmental change is highly correlated with urbanization, and continued socio-economic development will ensure that this process continues. In the future, more and more people will choose to live in cities. This data of urban population will continue to grow in the next decades. Living in the city improves the material conditions of living but is constantly limited by the availability of natural resources in the surrounding area. Overall, urbanization will have a significant impact on the sustainability of natural resources in the surrounding rural areas.
As a huge urban agglomeration that has been experiencing a remarkable urbanization process, the co-availability of natural ecological resources in the Guangdong-Hong Kong-Macau Greater Bay Area (GBA) is also limiting its process. As a major part of the ecosystem, water subsystems have been closed related to urbanization, water subsystems have been closed related to urbanization. Along with the increasing of water consumption, the growth in wastewater discharge can constrain the urbanization process. Maintaining and sustaining a sustainable water system is fundamental to the formation and development of cities. It is not only for the daily use of the city's inhabitants but also to ensure the sustainable operation of industry and agriculture.
In order to ensure the sustainable operation of the ecosystem services, a new circular water management network is necessary to exist. Different cities with different urbanization processes should set their own goals and directions according to their current physical conditions to form a more circular water resource system within the city and the surrounding area to achieve the vision of self-sufficient cities.
In addition, not only improve the capacity of water supply. Through the reconstructing and organizing of green space, the ecological and economic value of the land is improved, the risk resistance of the environment is increased, and a better living environment and activity space is provided for the residents of the city and the surrounding rural areas. Therefore. That can ensure the sustainable development of urbanization.
ZHANG Jinxu is a Chinese student who obtained bachelor in Landscape Architecture at Huazhong Agricultural University. Currently she is studying Urban Environments Design (Mdes). She is interested in small-scale urban design.
LIU Jiayuan is a Chinese student who obtained his B.Eng. in Urban Planning at Qingdao University of Technology. Currently he is studying Urban Environments Design (Mdes). His interest are mainly urban planning policy and strategy. With this course he hopes to get a deeper understanding of strategic planning in GBA content.
Water resources are more scarce in the eastern part of GBA and abundant in the western part. The new West-East Water Transfer Project is attempting to meet the water needs of the expanding cities in the east.