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一、地理环境与历史沿革河东区位于临沂市兰山区东部,地处北纬34°35′~35°20′与东经118°22′~118°40′之间,北接沂南县,西临沂河与兰山、罗庄二区相望,南与郯城县接壤,东南与临沭县相邻,东靠莒南县。因位于沂河东岸,故名。河东区地处山东三大平原之一——临郯苍平原,地势北高南低,地形多为平原,总面积730.63平方千米。境内水系发达,除沂沭河两大水系外,汤河、解白河在境内蜿蜒注入沭河。该域属沂沭河冲积平原地带,土地肥沃,气候宜人,地上地下矿产资源丰富,是历代先民繁衍生息的理想之地。
I. Geographical Environment and Historical Evolution Hedong District is located in the east of Lanshan District of Linyi City, between north latitude 34 ° 35 ’~ 35 ° 20’ and longitude 118 ° 22 ’~ 118 ° 40’, with Yinan County in the north and Yiyi County in the west. River and Lan Shan, Luo Zhuang two districts across the South and Tancheng County border, southeast and adjacent Linshu County, east of Junan County. Due to the east coast of Yi River, hence the name. Hedong District is located in Shandong Province, one of the three major plains - Linqu Cang plain, high terrain north and south low, the terrain mostly plains, with a total area of 730.63 square kilometers. The territory of the developed water system, in addition to Yishu two major river systems, the Tanghe, Baihe River meandering in the territory of injection Shuhe. The area is Yishu River alluvial plain, fertile land, a pleasant climate, rich in underground mineral resources, is an ideal place for generations of ancient people to flourish.