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山东黄河三角洲包括古代、近代和现代三角洲,其顶点分别为蒲城、宁海和罗家屋子,形成年代分别为公元前40年至公元1048年、1855~1976年及1976年至今。本文在概要介绍古代和近代三角洲的同时,着重分析了现行黄河口形态演变与现代三角洲发育的动力关系。 相似文献
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黄渤海海岸季节性风沙气候环境 总被引:6,自引:0,他引:6
分析了黄渤海海岸气候形成因素和影响风沙活动的各种气候要素的季节性变化特征,指出冬、春季研究区受东亚大陆气团的影响,形成了干旱、多风的风沙气候环境,尤其是渤海海岸地区冬、春季气候条件与我国内陆沙漠区和严重沙漠化地区相似,也存在风沙灾害的威胁。 相似文献
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EVOLUTIONARY PROCESS OF NORTHERN JIANGSU COASTAL ZONE AND A DYNAMIC EQUILIBRIUM MODEL OF NORTHERN JIANGSU SHOAL 总被引:1,自引:0,他引:1
The main portion of the northern Jiangsu coastal zone is the silty plain coast. The dynamic equlibrium has been broken continuously since the Quaternary, especially in the Holocene and the historical periods. In 1855 the Huanghe River (Yellow River) changed its channel entering into sea through the Bohai Sea. We find that the beach strand was then silting up intensely in the north of Qinggang but the coast was caving in and the beach was expanding in the south of Qinggang-. Multiple shoals and submarine ridges off the coast converged into Qionggang and formed a unique coastal landshaft. In this paper we describe the evolutionary process of the northern Jiangsu coastal zone and discuss the formative conditions for the northern Jiangsu shoal. Finally, a dynamic equilibrium model for the northern Jiangsu shoal is presented. 相似文献
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