摘要
采用2007年8月、2008年3月、2008年7月和2008年12月在灌河口至射阳河口岸段6条断面采集的底质样和相应潮滩表层沉积物样,以及废黄河口附近12条加密断面底质样,进行了粒度分析,并结合地质地貌、动力条件和水深资料,探讨了废黄河三角洲海域沉积物的粒度特征、分布类型及其规律。结果表明:废黄河三角洲海域沉积物类型主要为粘土质粉砂,由陆向海粒径逐渐变细,沿岸分布上则呈现自北向南逐渐变粗的规律;整个研究区域的沉积物呈现较粗,分选较差,呈正偏峰态窄尖的粒度特征;潮间带表层沉积物出现粗化现象。
Based on data of surface sediment samples which were collected at nearshore and intertidal area from Guanhe estuary to Sheyang estuary in August 2007,March 2008,July 2008 and December 2008,the characteristics of surface sediment types,distribution and deposition district in the subaqueous delta of the abandoned Yellow River delta were analyzed.The results show that： Seven types of sediment are present in the subaqueous delta of the abandoned Yellow River delta and adjoining areas according to the sediment classification scheme proposed by Shepard（1954）.Sediment grain sizes are coarser in the intertidal area than in the nearshore area.The longitudinal distribution（from north to south） of surface sediments of the abandoned Yellow River delta presented from fine to coarse particle sizes.There are several features of all the samples,coarse average grain size,poorly sorted,positive skewness and leptokurtic kurtosis.In addition,sediments in the intertidal area are changing from fine to coarse because of erosion action.
出处
《上海国土资源》
2011年第1期14-19,共6页
Shanghai Land & Resources
基金
国家重大基础科学研究计划(2010CB951202)
我国近海海洋综合调查与评价(908)项目(908-01-ZH2)
国家海洋局环境保护司海岸侵蚀影响评价项目(DOMEP(MEA)-01-11)
关键词
废黄河三角洲
粒度特征
沉积分区
动力环境
the abandoned Yellow River delta
size characteristics
deposition district
dynamical environment
