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一、北京市的自然条件北京市位于华北平原的西北隅,总面积为16807.8平方公里。从1:50万北京市土地资源图上量算,总面积为16693.75平方公里。山地占全市总土地的61.29%,平原占38.71%。北京市的西部和北部为山地,东南部为平原。西部山地统称西山,属太行山脉,由一系列EN——WS向褶皱山地组成,最高峰东灵山海拔2302米。主要组成物质是石灰岩、白云质灰岩、页岩、火山岩等。地面坡度>35°以上的山地有1537485亩;地面坡度在25°—35°之
First, the natural conditions of Beijing City is located in the northwestern corner of North China Plain, with a total area of 16,807.8 square kilometers. From 1: 500000 Beijing land resources map calculated on the total area of 16693.75 square kilometers. Mountain accounted for 61.29% of the city’s total land, plain accounted for 38.71%. The west and north of Beijing are mountainous and the southeast is plain. Western Mountain collectively known as Xishan, is a Taihang Mountains, by a series of EN - WS fold mountains, the highest peak Dongling Mountain 2302 meters above sea level. The main components are limestone, dolomitic limestone, shale, volcanic rock and so on. There are 1,537,485 acres of mountain land with slope above 35 ° on the ground and 25 ° -35 ° on the ground