三峡库区位于鄂西山地和川东平行岭谷区,东经107°20′～111°01′,北纬30°30′～31°20′。库区东部山高坡陡,河流深切,西部地形起伏较小,甚至是浅丘平坝,河流上宽下窄。气候上属亚热带季风气候,四季分明,年均气温18.1℃。植被以阔叶林为主,多为人工林和一些天然次生林。由于受小气候影响,库 The Three Gorges Reservoir Area is located in the mountainous area of ​​western Hubei Province and the parallel Lingg Valley area in eastern Sichuan Province, with longitude 107 ° 20 ’~ 111 ° 01’ and longitude 30 ° 30 ’~ 31 ° 20’ north. In the eastern part of the reservoir area, there are steep slopes and deep rivers, and the undulations in the western part are small. Even shallow valleys and flat valleys are wide and narrow on the river. Climate belongs to a subtropical monsoon climate, four seasons, with an average annual temperature of 18.1 ℃. Vegetation to broad-leaved forest-based, mostly artificial forests and some natural secondary forests. Due to the microclimate, the library