The fact that open water contributes to lowering air temperature is well known in urban landscape planning. Water bodies have been used as tools to reduce the urban heat island effect (UHI). However, the extent to which a water body propagates the cooling effect from the lakeshore is still largely unknown. This study aimed to (1) provide evidence for cooling air temperature on the surrounding urban lakeshore; (2) verify the effect of different land covers surrounding the lakeshore on lowering air temperature; and (3) determine the cooling effects at different distances from the different lakeside areas. Based on urban weather station data and on measured data from Daming lake, Jinan, China, the analytic results reveal significant cooling adjacent to the lakeshore with an average cooling of nearly 1°C from July to August. Following the air temperature drop, the cooling effect becomes increasingly weaker, reaching the lowest value of 0.3°C in October. Vegetated area causes more of a cooling effect than permeable or impermeable surface. However, the cooling difference between permeable surface and impermeable surface was less significant. At all measuring sites, the cooling level at a horizontal distance of 40 m from the lakeshore was less than 0.6°C.
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