Distribution States and Management Planning based on the Climate Change of Rhododendron yedoense var. poukhanense in Juwang Valley, Juwangsan National Park†

This study was conducted to understand the distribution characteristics of the <italic>Rhododendron yedoense</italic> var. <italic>poukhanense</italic> in a special protected area of Juwangsan National Park, and whether climate change, such as precipitation in summer, affect the growing environment of the <italic>Rhododendron yedoense</italic> var. <italic>poukhanense</italic>. In order to analyze the distribution characteristics of the <italic>Rhododendron yedoense</italic> var. <italic>poukhanense</italic>, the population was measured by dividing it based on growth base, waterfront sparation distance, branching rate, and labor. After measuring the population for each, there were significant diefferences between the distribution characteristics. As a result of the analysis of the one-way distribution of the <italic>Rhododendron yedoense</italic> var. <italic>poukhanense</italic>, the separation distance and branching rate, as well as the separation distance and labor of the waterfront, were discovered to be factors. As a result of investigating the river cross-sectional structure of the major distribution areas of the <italic>Rhododendron yedoense</italic> var. <italic>poukhanense</italic>, it was not wide, at 4.8 m. It was judged that the high flow rate in the valley due to torrential rains in July and August affects the cross-sectional structure of the river. Climate change with irregular and non-predictable characteristics was judged to affect the aquatic growth environment of the study site. The results of this study will be used as basic data for the preservation and management of the special protected area of the <italic>Rhododendron yedoense</italic> var. <italic>poukhanense</italic> plant colony, where climate change such as precipitation is of high conservational value.