Tag Archives: Three Gorges Dam

Megacities and the Scale of the Future

  by Mike Macartney

Demographic trends in society are pointing towardsmegacities, defined as populations of 10 million or more, as the future for how most people on the planet will live. There are 21 such cities today and they include Cairo, Mexico City, Lagos, Los Angeles, New York, Rio de Janeiro, Manila, Moscow, Tehran, London, Paris, and others, growing every day. Tokyo was at 34 million in 2011. These cities and what supports them are at the core issues of scale and sustainability.

  • How large will these cities grow?
  • How will people in the future supply them with energy, food, water, transportation, jobs, housing, education, health care, and not least of all, entertainment?
  • How will these cities fit into national models – will they become city-states like earlier times in human history?

Scientific groups like the Santa Fe Institute are studying that very sustainability. Other, informal web based groups of people like New Geography are also thinking about what cities and human society will become.

The issue of scale may be the defining issue of the 21st century. The solutions are not simple or even invented yet. For example, it is well known in investment circles that alternative energy does not scale like the Information Age cornerstones of semiconductors, telecommunications, and software. Because of the laws of physics in the universe we live in alternative energy requires large investments in land, labor, and raw materials. These are needed to provide grid energy systems like the current fossil fuel and nuclear powered electrical grids. Innovation in alternative energy is not information or knowledge based. It is execution and implementation based. Even if we think we know how to do it, we still have to get it done. Very large physical scale collection and distribution systems are required to implement alternative energy solutions. Presently, the profit for investment in large-scale energy systems ties to large-scale tax systems. These are linked to government subsidies and government funded infrastructure build-out to solve the scale problem. Will the same go for alternative energy?

The scale needed for alternative energy competes directly with the scale needed for agriculture, housing, environmental preservation, and transportation. One example is the Three Gorges Dam project in China that displaced over 1-million people. Hydroelectric power systems are solar energy systems. The water behind a dam is stored solar energy. Very large amounts of land are required for hydroelectric systems just like for proposed solar, wind, and biomass systems. All the systems require very large solar collectors to operate in a grid power model. Efficiency can never be greater than one. There is no Moore’s Law of exponential growth hidden in the current efficiencies of a few tens-of-a-percent and 100-percent in alternative energy collection components. Are grid power systems the future of alternative energy?

The solutions to the scale problems of megacities with high consumption rates of food, energy, and living space are complex and competing. Complexity is one of the areas of study by scientific think tanks like the Santa Fe Institute and government funded institutions like Harvard University and MIT. How do you think scale will be achieved to support megacities in the future?

About the Author

Mike Macartney

Mike holds a BS and MS in mechanical engineering with emphasis in heat transfer and computational fluid dynamics. As a staff system engineer he developed advanced cooling systems for more than 15 different spacecraft and missiles, ranging from cryogenically cooled sensors and pre-amplifiers to on-orbit problem resolution of failing spacecraft. Mike has managed over 200 proposals for advanced aerospace systems, and terrestrial IT systems and custom code development for corporate customers.

Mike has advised start-up companies and high-tech incubators wishing to “spin-in” technologies from NASA and the National Laboratories as well as helped Russian enterprises do business in Silicon Valley. Mike has been a founder in three start-up companies for enterprise SW and publishing as well as a trade show manager for NASA technology transfer activities, and an executive liaison manager to facilitate business cooperation between aggressive Fortune 500 competitors. Mike has developed reengineered business processes for quality control, proposal development, and lean manufacturing.

He currently operates a small publishing company, Shoot Your Eye Out Publishing


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