Why does it feel rainy under the willow tree in summer?

The reporter asked several scholars who studied landscape architecture. According to scholars' analysis, there may be two reasons for this phenomenon: first, due to the high temperature and strong sunlight, plants need to emit excess heat in transpiration because of their own protection mechanism, which is caused by excessive transpiration of plants; The second possibility is the "water spitting" phenomenon of plants, which is caused by the phenomenon that leaves may spit water because there is too much water in plants. As for the real reason of Yangliuyu phenomenon and why this phenomenon appears in Changchun, a water plant, many scholars still have different opinions on this series of problems and are constantly discussing them in depth.