茅家港滩面沉积物粒度变化及其与水动力的关系  

Grain-size distribution in Maojiagang beach sands and its relation to water dynamics

作　　者：王轲道[1,2] 王建[1] 何加武[1] 

机构地区：[1]南京师范大学地理科学学院 [2]临沂师范学院地理与旅游系,山东临沂276005

出　　处：《海洋科学》2005年第5期73-79,共7页Marine Sciences

基　　金：教育部重点项目(00170);国家教育振兴计划教育部青年教师奖励基金(2001JBC12)

摘　　要：根据野外观测的原始资料,绘出粒度的分布图和不同位置的剖面图,客观地分析了茅家港滩面沉积物粒度空间分布、季节变化、粒度变化与水动力的关系,研究发现:随着离岸向海距离的增加,中值粒径逐渐变小,粒径逐渐变粗。突堤内的中值粒径比突堤外的细。冬季的中值粒径比夏季的粗。随着离岸距离的增加,水动力逐渐增强,导致滩面沉积物的粒径逐渐变粗;突堤内的水动力比突堤外的水动力弱,致使突堤内滩面沉积物的中值粒径比坝外的细;冬季的水动力比夏季的水动力强,致使冬季滩面沉积物中值粒径比夏季粗。Grain _ size distribution was mapped by original data collected in Maojiagang Beach,its seasonal change and the to water dynamics.With distance increasing from the coast,median grain sized portion decreased,grain _ size become coarser.Grain _ size near dams is finer than it outside dams.Grain _ size in winter is bigger than it in summer.With distance to coast increasing,water dynamics be comes stronger,it lead to grain _ size gradually become bigger;Water dynamics in dams is feebler than it outside dams,it lead to the grain _ size in dams is smaller than it outside dams;water dynamics in winter is stronger than it in summer,resulting in coarser sand than it in summer.

关 键 词：粒度 变化 水动力 关系 

分 类 号：P736[天文地球—海洋地质] P931[天文地球—海洋科学]