摘要
在巢湖取得3个有代表性的沉积物柱样,用激光粒度仪对其进行粒度分析,并用137Cs法测定了沉积速率.结果表明,沉积物的粒度特征随着湖区的水动力条件的波动而发生有规律的变化.近百年来湖区的沉积环境基本上比较稳定,C1、C2和C3三个研究区的沉积速率分别为0.29cm/a,0.35cm/a和0.24cm/a.根据粒度和沉积速率特征,两百多年来,巢湖存在两个洪水期和两个平水期,这些变化与巢湖自然环境和人类活动有着密切关系.
Three lacustrian sediment samples were collected from Chaohu Lake in December 2002 in the Yangtze delta region. These samples were analyzed using a Laser Analyzer and obtained grain-size parameters. Sedimentation rates were determined with radioisotopes ^(137)Cs and the average sedimentary rates are 0.29cm/a,0.35cm/a and 0.24cm/a in Cores C1, C2 and C3, respectively. The grain-size parameters of the deposits vary regularly with the fluctuation of hydrodynamics. There are many differences of sedimentation rates in different periods. These varies have important relations between sedimentary environment and human activities.
出处
《安徽师范大学学报（自然科学版）》
CAS
2004年第1期101-104,共4页
Journal of Anhui Normal University(Natural Science)
基金
中国科学院知识创新工程重大项目-长江中下游地区湖泊富营养化的发生机制与控制对策研究(KZCX1-SW-12)
东湖湖泊生态系统试验站(200105)联合资助.
关键词
长江下游地区
巢湖
湖泊沉积物
粒度特征
沉积环境
grain-size parameters
^(137)Cs dating
sedimentation rate
sedimentary environment
Chaohu Lake
