摘要
通过对苏北高邮湖GY07-02柱状样沉积物的含水率、粒度、有机碳、碳酸盐含量等环境替代指标的分析,结合14 C年代测定,初步揭示了该地区近1 100年来湖泊沉积特征及环境演化历史,大致可以分为3个阶段:920—980AD,为沼泽沉积环境;980—1240AD,湖泊开始扩张,水位上升;1240AD至今,黄河物质通量显著增加。进一步说明湖泊的演变不仅与黄河南泛夺淮有关,也与人类活动如人口迁移、湖泊周围建闸、围湖造地、富营养化程度加剧等关系密切。
The work is based on a continuous column GY07-02 taken from the Gaoyou Lake in North Jiangsu Province.Detailed evidence of particle size,water content,organic carbon content and total carbonate content is collected,combining with 14 C dating and calibration.The history of environment variations of the Gaoyou Lake since 1100 ais reconstructed.During 920-980 AD,the study area was a marsh;During980-1240 AD,the lake area was expanded with water level rising;and since 1240 AD,the Huanghe River shifted to the south and the Yellow sea invaded the area through the Huanghe River estuary that resulted in the increase in sediments.The changes in lake environment were not only related to the natural environment changes,but also human activities,such as the shifting of Huanghe（Yellow）River channel,construction of dams around the lake,land reclamation and water eutrophication.
出处
《海洋地质与第四纪地质》
CAS
CSCD
北大核心
2014年第4期145-151,共7页
Marine Geology & Quaternary Geology
基金
国家自然科学基金项目(40901101
40776023)
关键词
环境演变
人类活动
高邮湖
Gaoyou lake
environmental change
human activities
