Building a Climate-Resilient Water Circulation City in a New Normal Era (Ⅰ)
- Author Kim, Hojeong
- Researchers Ahn, Jongho; Yang, Iljoo; Han, Daeho; Kim, Suebean
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Date
2022-12-31
Ⅰ. Background and Research Objectives
1. Background
o Current urban water management challenges such as floods, droughts, and water pollution could escalate into a bigger crisis due to climate change, aging infrastructure, and the spread of infectious diseases.
ㅇ The urban water management system should be changed to a more sustainable and resilient one in order to flexibly respond to such challenges.
2. Research objectives
o The purpose of this study was to propose the concept of a ‘water circulation city’ where the urban water system has higher resilience to various risk factors including climate change and its implementation steps.
ㅇ Specifically, authors studied the closed-loop system of water use & reuse, and the production of renewable energy from domestic wastewater.
Ⅱ. The Concept of ‘Water Circulation City’
1. Urban water management issues
o Rapid urbanization has increased impervious surfaces, which resulted in a higher risk of urban flooding during the rainy season and a decrease in stream flow during the dry season.
o The COVID-19 pandemic has a significant impact on various aspects of the urban water system including water abstraction, water supply and demand, water use, wastewater treatment, and others.
ㅇ During the COVID-19 period, the demand for commercial and industrial water decreased, while the demand for household water increased significantly due to stay-at-home orders in many cities.
o Given that 60% to 80% of global energy consumption occurs in urban areas, the decarbonization of cities is critical to achieving carbon neutrality.
2. Discussion o
1. Background
o Current urban water management challenges such as floods, droughts, and water pollution could escalate into a bigger crisis due to climate change, aging infrastructure, and the spread of infectious diseases.
ㅇ The urban water management system should be changed to a more sustainable and resilient one in order to flexibly respond to such challenges.
2. Research objectives
o The purpose of this study was to propose the concept of a ‘water circulation city’ where the urban water system has higher resilience to various risk factors including climate change and its implementation steps.
ㅇ Specifically, authors studied the closed-loop system of water use & reuse, and the production of renewable energy from domestic wastewater.
Ⅱ. The Concept of ‘Water Circulation City’
1. Urban water management issues
o Rapid urbanization has increased impervious surfaces, which resulted in a higher risk of urban flooding during the rainy season and a decrease in stream flow during the dry season.
o The COVID-19 pandemic has a significant impact on various aspects of the urban water system including water abstraction, water supply and demand, water use, wastewater treatment, and others.
ㅇ During the COVID-19 period, the demand for commercial and industrial water decreased, while the demand for household water increased significantly due to stay-at-home orders in many cities.
o Given that 60% to 80% of global energy consumption occurs in urban areas, the decarbonization of cities is critical to achieving carbon neutrality.
2. Discussion o