地理学报 ›› 2000, Vol. 55 ›› Issue (1): 66-74.doi: 10.11821/xb200001007

• 论文 • 上一篇    下一篇

云南洱海流域人类活动的湖泊沉积记录分析

张振克1,2, 吴瑞金2, 朱育新2, 潘红玺2, 吴艳宏2, 夏威岚2, 李徐生1   

  1. 1. 南京大学大地海洋科学系,南京210093;
    2. 中国科学院南京地理与湖泊研究所,南京210008
  • 收稿日期:1999-06-18 修回日期:1999-09-12 出版日期:2000-01-15 发布日期:2000-01-15
  • 基金资助:
    国家自然科学基金(49672132)

Lacustrine Records of Human Activities in the Catchment of Erhai Lake, Yunnan Province

ZHANG Zhen ke1,2, WU Rui jin2, ZHU Yu xin2, PAN Hong xi2, WU Yan hong2, XIA Wei lan2, LI Xu sheng (1   

  1. 1. Department of Geo and Ocean, Nanjing University, Nanjing 210093;
    2. Institute of Geography and Limnology, CAS, Nanjing 210008
  • Received:1999-06-18 Revised:1999-09-12 Online:2000-01-15 Published:2000-01-15
  • Supported by:
    National Science Foundation of China,No.49672132

摘要: 根据湖泊沉积记录的环境指标变化,对云南洱海地区人类活动的湖泊沉积响应进行了系统的讨论。洱海湖泊沉积物记录显示,湖泊沉积物磁化率参数对洱海流域土地利用方式变化特别是耕作农业的出现有显着响应;沉积物元素Fe、Al含量的变化也与流域人类活动影响下的地表水土流失有密切联系; 沉积物色素的变化则指示湖泊富人为营养化的历史。湖泊沉积物磁化率、元素、色素指标的变化是指示湖泊流域人类活动的有效指标并具有重要的科学考古学意义。

关键词: 洱海, 湖泊沉积, 环境指标, 人类活动

Abstract: Based on the results of lacustrine environmental proxies from Erhai Lake, Yunnan Province,the lake responses of human activities recorded by lacustrine sediment in the catchment have been discussed. The Erhai Core of 310 cm long was sampled in the center of Erhai Lake with the water depth of 4 6 m. The modern sedimentation rate by 137 Cs test is ≤0 25 mm/a, which is consistent with the average sedimentation rate of the upper 100 cm with radio carbon years of 4 473±40 a BP at the bottom. Because the surface soil are rich in magnetic materials. The environmental proxy of magnetic susceptibility was obviously influenced by the way of land use especially the occurrence of farming agriculture. So the sharp increase of magnetic susceptibility at 100 cm with ca 4 500 a BP means the intensification of human activities especially the occurrence of farming agriculture. The time of the ancient farming occurrence recorded by the lake sediment is older than the archaeological relics with the radio carbon years of ca 3 800 a BP in Baiyang Village near the catchment of Erhai Lake. The surface soil is rich with elements of Fe and Al in the catchment of Erhai Lake. So the changes of chemical elements contents (Fe, Al) had close relationship with surface water soil erosion which controlled by the human activities in the catchment. The huaman relics of Malong in the catchment of Erhai Lake with the age of 34003100aBP which corresponding with the sharp increase of element Fe and Al. The lower content of Fe, Al in the upper 15 cm may be affected by the aquatic vegetation which can absorb some chemical elements including Fe and Al. The variations of pigments indicated the process of lake eutrophication induced by human activities. The first and second peaks of pigments correspond with the time of Malong Relics and the first population summit of Yunnan Province. The obvious increase of pigments was occurred in 1100 AD with the large population migrated to Yunnan. The proxies of lacustrine magnetic susceptibility, chemical elements and pigments are the efficient parameters to demonstrate the human activities in the catchment, which has important significance in the research on archaeology.

Key words: Erhai Lake, Lacustrine sediments, Evironmental proxies, Human activities

中图分类号: 

  • P512.2