5:15 PM - 6:45 PM
[HCG22-P04] Research on the water retention and cooling effects of urban greening for climate change adaptation
Keywords:Climate change, Urban greening, Green infrastructure
Recent global climate change and rapid urbanization have increased the risk of various urban environmental problems. Urban greening, one type of green infrastructure, is attracting attention as a climate change adaptation measure because it is known to have water retention effects that contribute to the control of urban flooding and cooling effects that reduce the urban heat island. Although many studies have independently evaluated these two effects of urban greening, few studies discuss their effects relatively. Since the retention and cooling effects of urban greening are similar in that they both involve the water balance of the land surface, it is thought that evaluating these two effects not only independently but also relatively will lead to introducing more flexible and feasible climate change adaptation measures. Based on the results and discussions obtained, we will proceed to evaluate the effects of urban greening within the target area to achieve the objectives of this study.
We will discuss the sensitivity and correlation of the water retention and cooling effects of urban greening in different climates and greening conditions. This study aims to provide essential scientific knowledge to those considering the introduction of urban greening as a climate change adaptation measure. Influences at the city block scale, such as anthropogenic thermal contribution, wind environment, land slope, and drainage systems, are outside the scope of this study.
We evaluated whether the land surface model SMBM, used in a previous study (M. O. Cuthbert et al., 2022) to quantify these effects, could accurately reproduce real-world soil moisture variability. The method used was to reproduce the experimental conditions in a model based on a study (Andrew W. Sims et al., 2016) conducted in three different Canadian climates regions to demonstrate rainwater runoff from green roofs, compare the obtained runoff with the experimental results in each region during the study period, and quantify the acceptable range of error. In addition, we evaluated and discussed the differences in rainwater runoff when model parameters were changed according to urban greening cases such as green roofs and green parks. We examined the model characteristics of SMBM and the sensitivity of each parameter to the retention and cooling effects, respectively.
We will discuss the sensitivity and correlation of the water retention and cooling effects of urban greening in different climates and greening conditions. This study aims to provide essential scientific knowledge to those considering the introduction of urban greening as a climate change adaptation measure. Influences at the city block scale, such as anthropogenic thermal contribution, wind environment, land slope, and drainage systems, are outside the scope of this study.
We evaluated whether the land surface model SMBM, used in a previous study (M. O. Cuthbert et al., 2022) to quantify these effects, could accurately reproduce real-world soil moisture variability. The method used was to reproduce the experimental conditions in a model based on a study (Andrew W. Sims et al., 2016) conducted in three different Canadian climates regions to demonstrate rainwater runoff from green roofs, compare the obtained runoff with the experimental results in each region during the study period, and quantify the acceptable range of error. In addition, we evaluated and discussed the differences in rainwater runoff when model parameters were changed according to urban greening cases such as green roofs and green parks. We examined the model characteristics of SMBM and the sensitivity of each parameter to the retention and cooling effects, respectively.