Analysis of the rainfall runoff and heat flux characteristics of a green roof
Abstract
The alternation of land cover due to urban expansion increases the impervious area and inhibits the processes in the natural water cycle such as evapotranspiration and infiltration. It causes the changes in the surface runoff and the land-atmosphere interaction. The policies of green roof subsidy that are actively promoted in recent years raise the related industries, increasing the needs of investigating the actual function of green roof in the urban area. Many studies have proofed the functions of green roof in retaining rainwater and adjusting energy budget. However, the functions of green roof vary with the environment and conditions. The findings of the previous research may not be applicable to the cases in Taiwan, and the number of the long-term studies in green roof measurement and model validation are still limited. This study builds green roof module and measurement system and investigates the function of green roof in retaining rainwater and affecting the heat flux entering the building. The continuous observation is conducted, and the characteristics of rainfall runoff is analyzed, to clarify the feature of water balance. Moreover, the heat flux characteristics of a green roof are investigated, to understand its thermal effect on the building below.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.H13I1779C
- Keywords:
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- 0412 Biogeochemical kinetics and reaction modeling;
- BIOGEOSCIENCES;
- 0414 Biogeochemical cycles;
- processes;
- and modeling;
- BIOGEOSCIENCES;
- 1871 Surface water quality;
- HYDROLOGY;
- 1880 Water management;
- HYDROLOGY