Rural urban divide in blue space effects on thermal milieu in floodplain region
摘要
The objective of this study is to examine the variations in the temperature-moderating effect of blue spaces in rural and urban environments. Perennial blue space exhibited a notable decrease in maximum temperatures of more than 5 °C when compared to those with seasonal hydro-duration. In addition, blue spaces that were hydrologically consistent contributed to reducing maximum temperatures by up to 3.7 °C in rural areas and 2.18 °C in urban areas. In terms of depth zones, rural water bodies experienced temperatures 0.64 °C lower during the pre-monsoon season and 0.75 °C lower during the post-monsoon season. In contrast, metropolitan areas showed temperature differences of 2.01 °C and 1.37 °C respectively. Moreover, the greatest temperature difference between the core and patch of blue space was 8.31 °C in rural areas and 5 °C in urban areas. The distinct variations in the cooling impact can be attributed to the contrasting land use patterns between urban and rural landscapes. Urban blue spaces are often surrounded by concrete surfaces, which retain heat for a longer duration. Sometimes tall buildings surrounding the blue space limit the spread of cooling effect in urban neighborhoods. In contrast, rural blue spaces are predominantly encompassed by spaces with lesser heat sensitivity such as agricultural land or vegetation. These findings will assist planners to utilize hydrological components of blue spaces in order to optimize the temperature moderating benefits. Furthermore, comparing the impact of this effect between rural and urban areas will contribute valuable insights to this field of study.