ChengHe Guan is an Assistant Professor of Urban Design at New York University Shanghai. He also served as an Associate Research Fellow at the John A. Paulson School of Engineering and Applied Sciences at Harvard University. He taught an urban design studio, a research seminar on spatial analysis, and a lecture course on urban design and spatial formation at Harvard Graduate School of Design and Harvard College from 2015-2018. Dr. Guan is a consultant for the PEAK Urban program at COMPAS, University of Oxford and the World Bank urban development sector.
He received his doctoral degree from the Department of Urban Planning and Design, Graduate School of Design at Harvard University. His recent publications including using cellular automata models to investigate network of cities and towns:
WELCOME TO CHENGHE GUAN
Lab of Urban Computation and Analytics (LUCA)
Lab of Urban Science, Spatial Computation and Data Analytics (LUCA) in Shanghai is a research based design consulting lab in collaboration with City Builder Design.
Faculty Advisory Board
Micheal Keith, Oxford
Michael Keith is Director of the Centre on Migration, Policy and Society at the (COMPAS) at the University of Oxford, co-ordinator of Urban Transformations (The ESRC portfolio of investments and research on cities), co-Director of the Oxford Programme for the Future of Cities and the Director of the PEAK Urban Research programme.
Rahul Mehrotra, Harvard
Rahul Mehrotra is Professor of Urban Design and Planning at the Harvard Graduate School of Design. He is a practicing architect, urban designer, and educator. His Mumbai-based firm, RMA Architects,(www.http://rmaarchitects.com) was founded in 1990 and has designed and executed projects including government and private institutions, corporate workplaces, private homes, and unsolicited projects driven by the firm’s commitment to advocacy in the city of Mumbai.
Maria Montoya, NYU Shanghai
Maria Montoya is the Dean of Arts and Sciences at NYU Shanghai. As Dean, she is responsible for academic affairs, curriculum coordination, and intellectual development of the humanities, social sciences, and natural sciences.
Chris Nielsen, Harvard
Nielsen is the executive director of the Harvard-China Project on Energy, Economy and Environment. Working with faculty at collaborating Chinese universities and across the schools of Harvard, he has managed and developed the interdisciplinary China Project from its inception. See the main Harvard-China Project website for a summary of this work, starting with research and editing of the book that launched the Project, Energizing China: Reconciling Environmental Protection and Economic Growth (1998, HUCE and Harvard U. Press, with McElroy and Peter Lydon).
Richard Peiser, Harvard
Richard Peiser has been the Michael D. Spear Professor of Real Estate Development at the Graduate School of Design since 1998. He is also Director of the university-wide Real Estate Academic Initiative created in 2003. He was previously on the faculty at the University of Southern California (1986-1998) as associate professor of urban planning and development, director of the Lusk Center for Real Estate Development, and Academic Director of the Master of Real Estate Development Program that he founded in 1986.
Peter Rowe, Harvard
Rowe served as Dean of the Graduate School of Design at Harvard from 1992 to 2004, and was Chairman of the Urban Planning and Design Department from 1988 until 1992, and Director of the Urban Design Programs from 1985 until 1990. Prior to Harvard, Rowe served as the Director of the School of Architecture at Rice University from 1981 to 1985 and also directed many multi-disciplinary research projects through the Rice Center, where he was Vice President from 1978 onwards, and at the Southwest Center for Urban Research.
Quang The Minh Luong
Recent works including Shaolin Zen Buddhism Meditation Center in New York, Marathon course master planning in Guilin, etc.
November 21, 2018
From Megalopolis to Gigalopolis
Megalopolis is defined as a chain of roughly adjacent metropolitan areas, which may be somewhat separated or may merge into a continuous urban region. First used by Patrick Geddes, a Scottish geographer and town planner, in his 1915 book Cities in Evolution (Geddes, 1915), and then by Lewis Mumford, an American urbanist, in his 1938 book The Culture of Cities, Megalopolis was used to describe the first stage in urban overdevelopment of social decline. In 1961, a French Geographer Jean Gottmann in his Megalopolis: The Urbanized Northeastern Seaboard of the United States, populated the word among urban planners, urban geographers, and urban designers. Gottmann described a continued cluster of cities extending from Boston through New York City, Philadelphia, and Baltimore and ending in Washington DC after his visit of the northeastern seashore of the US (Gottmann, 1961). Gottmann defined that a megalopolis to be around 25 million people. While most of North American’s megalopolis is in the range of no more than 10 million, some East Asian cases has far exceeded Gottmann’s number, for example, the Yangtze River Delta Megalopolis is estimated to have over 80 million in population. Recent scholars started to use megacities, megaregions, or network of cities and towns interchangeably. For example, American 2050, a Regional Plan Association’s national infrastructure planning and policy program claimed to identify 11 megaregions in the US and Canada (http://www.america2050.org/about.html).
At the turn of the Century, a term Gigalopolis emerged in response to the growing urban structure containing billions of people worldwide (Project Gigalopolis). The argument made by the project is that “Urban settlements and their connectivity will be the dominant driver of global change during the twenty-first century. Intensely impacting land, atmospheric, and hydrologic resources, urban dynamics has now surpassed the regional scale of megalopolis and must now be considered as a continental and global scale
1) Proportion of prefabricated residential buildings: According to the previous data, commercial residential
Housing accounts for 40.7% and affordable housing accounts for 13.4%, while newly-started prefabricated housing accounts for 13.4%
We believe that the growth rate of new real estate starts will slow down after 20 years, and 20
After 2000, people’s livelihood resettlement work will shift the focus from shantytown reconstruction to old community reconstruction.
We expect that the proportion of prefabricated houses will show a certain downward trend by 2025, and the proportion is expected to reach
2) Residential sector: We have published the "Prefabricated Construction Industry Chain System" on June 3
One of the first studies: Steel structure is booming, and the penetration of subdivisions is accelerating."
The penetration rate of steel structure housing in the residential sector is expected to rise from 1% to 10%. Refer to Jiangxi Housing
The Ministry of Construction will start construction of steel structure prefabricated housing in the province in 2022, accounting for 10% of newly built housing
Target above), so the penetration rate of steel structure residential
The penetration rate of the PC structure in the field is still expected to maintain a high level;
3) Non-residential areas: commercial real estate, venues and other public buildings due to space span, project
For reasons such as economic efficiency, steel structures are currently the mainstream of use, while civil infrastructure such as schools and hospitals
We believe that the proportion of steel structures used also has more room for improvement, so we expect
Non-residential steel structures are still expected to maintain an annual increase of about 1% in 20-25 years;
According to calculations, we estimate that between 2020 and 2025, the PC structure in new prefabricated buildings
Although the proportion has declined to a certain extent, it is still the mainstream of development in the field of prefabricated construction in 20-25 years
Structure, the proportion is expected to reach 55% in 2025