福建平潭岛的风沙地貌与海岸演变  

Aeolian landforms and coast evolution on Pingtan Island,Fujian Province

作　　者：石谦[1] 蔡爱智[2] 

机构地区：[1]厦门理工学院环境工程系,福建厦门361024 [2]厦门大学海洋学系,福建厦门361005

出　　处：《台湾海峡》2009年第2期163-168,共6页Journal of Oceanography In Taiwan Strait

摘　　要：在台湾海峡众多的海岛中,平潭岛以风大、沙多著称.风沙作用发生在2400a B.P.左右至今,风沙作用使该岛增加了90km2的土地.本文论述的海岛东部风沙地貌系列受NNE优势风控制,是泥砂在风和水动力作用下复合搬运与沉积的产物,以堆积型为主,伴生侵蚀-刻蚀型.风沙在七里埔、苍海造就了约14km2的土地,在岛的中部建造了淡水湖泊"岚湖",在田美沃留下了风蚀刻痕微地貌.此外,风沙活动还影响了海岛东部地区海岸沙滩的冲淤变化.平潭岛风沙地貌系列是台湾海峡一个独特的地质景观,其对海岸带环境变化的影响在中国东部极具代表性,在我国沿海风沙地层学和地貌学上均有较高的科研价值.Pingtan Island is famous in its strong winds and a huge amount of sands in many islands in the Taiwan Strait. The recent coastal aeolian activity on this island began 2 400 years ago. The aeolian sediments have formed about 90km^2 lands on the island. This paper summarizes the aeolian geomorphic features, aeolian sedimentations and aeolian sands transportation in the east of island. Under prevailing winds, waves and currents, the aeolian accumulation formed about 14 km^2 lands in Qilipu and Canhai areas, and built a freshwater lake （Lanhu） in the center of the island. The aeolian erosion produced a series of notches on the rock surface in Tianmeiwo Cape and played an important role on the beach accumulation and erosion. Pingtan Island aeolian landform series are especial geologic landscape in Taiwan Strait. The aeolian infection is typical on the ehanges of coastal zone environment in eastern China. They are of high scientific value in the study of stratigraphy and geomorphology.

关 键 词：风沙 地貌 海岸演变 平潭岛 台湾海峡 

分 类 号：P737.1[天文地球—海洋地质]