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<p>The urban heat island effect (<i>UHI</i>), where urban areas retain more heat than rural areas, disrupts ecological processes and affects living organisms. The mitigation of <i>UHI</i> can be achieved through the implementation of green and blue infrastructure. Although green spaces have been extensively studied regarding their cooling effects, the role of water bodies, particularly narrow ones such as urban rivers, has received comparatively less attention in the literature. This study employed Pearson correlation analyses to examine the strength and direction of the linear relationship between land surface temperature (<i>LST</i>) and distance from the Porsuk River in Eskişehir, utilising <i>LST</i> data obtained from Landsat images. Fisher’s least significant difference tests were employed to ascertain the effective cooling distances, while <i>UHI</i> and hot spot analyses were conducted for the purpose of spatial verification. The results demonstrated a statistically significant positive correlation between <i>LST</i> and distance from the river. The findings indicated that water bodies can reduce temperatures by up to 3.41&#xa0;°C within 90&#xa0;m in summer and by 2.03&#xa0;°C and 1.92&#xa0;°C at distances of up to 120&#xa0;m in spring and autumn, respectively. This research emphasises the significance of narrow rivers in urban planning, highlighting their potential to effectively mitigate <i>UHI</i> effects. These findings can inform urban planners and policymakers in developing climate adaptation strategies by emphasizing the preservation and enhancement of riparian zones.</p>

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Assessing the cooling effects of narrow urban rivers: a spatial analysis of the Porsuk River

  • 期刊论文

  • 发表日期：

    2025年6月24日

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  • Eren Dağra Sökmen,
  • Merve Eminel Kutay

摘要

The urban heat island effect (UHI), where urban areas retain more heat than rural areas, disrupts ecological processes and affects living organisms. The mitigation of UHI can be achieved through the implementation of green and blue infrastructure. Although green spaces have been extensively studied regarding their cooling effects, the role of water bodies, particularly narrow ones such as urban rivers, has received comparatively less attention in the literature. This study employed Pearson correlation analyses to examine the strength and direction of the linear relationship between land surface temperature (LST) and distance from the Porsuk River in Eskişehir, utilising LST data obtained from Landsat images. Fisher’s least significant difference tests were employed to ascertain the effective cooling distances, while UHI and hot spot analyses were conducted for the purpose of spatial verification. The results demonstrated a statistically significant positive correlation between LST and distance from the river. The findings indicated that water bodies can reduce temperatures by up to 3.41 °C within 90 m in summer and by 2.03 °C and 1.92 °C at distances of up to 120 m in spring and autumn, respectively. This research emphasises the significance of narrow rivers in urban planning, highlighting their potential to effectively mitigate UHI effects. These findings can inform urban planners and policymakers in developing climate adaptation strategies by emphasizing the preservation and enhancement of riparian zones.