Application of green blue roof to mitigate heat island phenomena and resilient to climate change in urban areas: A case study from Seoul, Korea

Abstract

Green blue roof has the potential to reduce the surface temperature of the building in the urban areas. Green blue roof is a new innovative low impact development (LID) practice that has exhibited an option to mitigate the heat island phenomena in urban area. This is the modified form of green roof that has ability to store rainwater in vegetation, soil layer and increases the evapotranspiration rate which decreases the temperature of an area. For this purpose, green blue roof is installed at the Cheong-un middle school building roof, Seoul, Korea. During the different time scenarios the surface temperature from the green blue roof and control roof were analyzed and their results were compared with each other. The results revealed that the surface temperature of green blue roof was much less as compared to control roof under same climatic conditions. From the results it is also concluded that surface temperature value of green blue roof was less than 5°C to 9°C as compared to control roof.

Recent Progress in Low-Impact Development in South Korea: Water-Management Policies, Challenges and Opportunities

“…LID practice designs were modified by the authors and applied in the Seoul areas, and the results show that these practices enhance their performance for stormwater management. The research results of LID practices showed that these are useful for handling rainfall runoff in small storm events of 50 mm/h [35,36]. The above results showed the LID practices are helpful for stormwater management in urban areas.…”

“…The Seoul Metropolitan LID project is one of the biggest national LID project in South Korea, and the authors of this paper are also working on this project. Green roof, green blue roof (combination of the green and blue roof) [35][36][37][38], blue roof [36], bioretention, permeable pavements, storage tank, cistern etc. [39] technology is applied at the different sites and the results manifested for stormwater management.…”

“…The above results showed the LID practices are helpful for stormwater management in urban areas. Results from these facilities show tremendous success in controlling a large amount of water in big storm events [35,36]. The blue roof is a cost-effective LID practice and used to control stormwater in the case of small rain events [36].…”

“…Combination of green roof + blue roof [35][36][37] Can capture in a large rain event, Reducing runoff, controlling heat-island phenomena [35][36][37] Need expertise fin the design of green blue roof [36] Permeable pavements Songpa, Seoul Typical design of permeable pavement [20] To reduce flash flooding and water-related problems [20] Expensive and needs special design [20] Green roof…”

Tourists’ Thermal Experience and Health in a Commercial Pedestrianized Block: A Case Study in a Hot and Humid Region of Southern China

“…A higher H/W and lower SVF can contribute to improved outdoor thermal comfort. In addition, vegetation on both streets and rooftops can also ameliorate the thermal environment through evapotranspiration effects [18][19][20][21][22][23][24][25][26][27][28][29][30][31]. Reducing the percentage of hardened ground also can change inner microclimates [18,32,33].…”