通化市位于吉林省南部山区，四面环山，沟壑相连，山高坡陡，土层薄，雨量充沛，雨季易造成水土流失。４０多年来，累计治理水土流失面积７６９０ｈｍ２，占原有流失面积的６６％，浑江堤防整治、城区河流整治及市区周边山区１６条沟的整治等，为美化环境，减轻水土流失发... Tonghua City, located in the southern mountainous area of ​​Jilin Province, surrounded by mountains, gully connected, steep mountain slopes, thin soil, abundant rainfall, the rainy season can easily lead to soil erosion. Over the past 40 years, a total area of ​​7690hm2 has been treated for soil erosion, accounting for 66% of the original loss area, remediation of the Hunjiang River, remediation of urban rivers and remediation of 16 ditches in mountainous areas around the urban areas, etc. to beautify the environment and reduce soil erosion. .