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中堡岛(又名松苞岛、中包岛)位于长江西陵峡境三斗坪镇(因建葛洲坝该镇已拆迁)西1公里许,四周为砂石堆积的河漫滩,中部隆起而平缓,其上竹树葱笼,远视如一座堡垒,故名。全岛东西长约1000、南北宽300—400米,西端隔茅坪溪与秭归县茅坪镇相望,南侧近山,中隔一条宽约数十米的江汊;北临长江(图一;图版壹,1)。
Fort Island (also known as Songba Island, Zhongbao Island) is located in the Yangtze River Xiling Gap Sandouping Town (due to Gezhouba dam town has been demolished) 1 km west, surrounded by sand and gravel floodplain, the central uplift and gentle, Bamboo onions on its green cage, hyperopia, such as a fortress, hence the name. The island is about 1000 east-west, 300-400 meters wide from north to south, west of Mau Pingxi and Mau Ping Town, Zigui County, south of the mountain, separated by a width of dozens of meters of jianglao; north of the Yangtze River ; Figure One, 1).