River surface temperature as a mediator of cooling effects: the interactive effects of riparian land cover in Changzhou, China

River surface temperature as a mediator of cooling effects: the interactive effects of riparian land cover in Changzhou, China | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 16 December 2025 V1 Latest version Share on River surface temperature as a mediator of cooling effects: the interactive effects of riparian land cover in Changzhou, China Authors : Xinjun Wang 0000-0003-0732-5716 , Shengming Gong [email protected] , Xiaopeng Sun , and Martin Dallimer 0000-0001-8120-3309 Authors Info & Affiliations https://doi.org/10.22541/au.176589246.66929300/v1 146 views 99 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Urban rivers and canals can play a vital role in mitigating the urban heat island effect, yet the interplay of factors influencing their cooling capacity remains underexplored. This study examines the cooling effect of the network of rivers and canals known as the Grand Canal in Changzhou, China, focusing on the mediating role of water surface temperature (WST) and the influence of riparian land cover and wind direction. Using Landsat 8 TIRS-derived land surface temperature and i-Tree Canopy-based land cover analysis, we quantified the temperature drop amplitude (TDA) and cooling range (CR) across eight canal segments. Results show the canal had lower WST than the urban area. The median TDA was 6.75°C (IQR: 4.44–7.39°C), and the median CR was 210 m (IQR: 120–270 m). Mediation analysis demonstrated that the association between greenspace/impervious coverage and TDA was completely mediated by WST. Furthermore, ridge regression results indicated that for each 1% increase in impervious coverage, WST was elevated by 0.22°C, whereas a 10% increase in greenspace coverage resulted in a reduction of WST by 0.13°C, and a 10 m increase in canal width resulted in a reduction of WST by 0.1°C. Wind direction could extend CR and increase TDA in the downwind banks. These findings underscore the critical role of WST and strategic land use planning in enhancing urban river cooling. Supplementary Material File (manuscript_names.docx) Download 3.30 MB File (table 1.docx) Download 15.75 KB Information & Authors Information Version history V1 Version 1 16 December 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords comparative ecosystem ecosystem ecology ecosystem function statistical Authors Affiliations Xinjun Wang 0000-0003-0732-5716 Changzhou Institute of Technology View all articles by this author Shengming Gong [email protected] Suzhou City University View all articles by this author Xiaopeng Sun Changzhou Institute of Technology View all articles by this author Martin Dallimer 0000-0001-8120-3309 Imperial College London View all articles by this author Metrics & Citations Metrics Article Usage 146 views 99 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Xinjun Wang, Shengming Gong, Xiaopeng Sun, et al. River surface temperature as a mediator of cooling effects: the interactive effects of riparian land cover in Changzhou, China. Authorea . 16 December 2025. DOI: https://doi.org/10.22541/au.176589246.66929300/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu . 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