近7000年来南通地区环境演变及人类活动影响

ENVIRONMENTAL CHANGES AND EFFECTS OF HUMAN ACTIVITIES IN NANTONG AREA,JIANGSU PROVINCE OF CHINA SINCE 7000 a BP

南通地区近7 000 a来环境演变研究对整体区域规划、资源合理利用、经济建设具有重要的理论和实践意义。通过对已有文献资料整理,研究了南通地区近7 000 a以来的成陆过程和人类活动对其影响。着重以下几个方面:(1)河流挟沙等作用对成陆过程的影响;(2)黄海波流对成陆过程的影响;(3)人类活动在促进成陆过程中的作用;(4)三者共同作用下的南通地区成陆过程。以定性分析为主,对于具体的成陆范围需要借助于更详细的钻孔资料。最后提出量化南通地区成陆过程的研究方案:收集南通地区已有的钻孔资料,利用插值算法及钻孔不同深度范围的古地理环境状况,生成该地区不同时间阶段的成陆范围,再结合实际调查、考古资料、历史文献、遗址等确定详细的成陆范围及过程。

Nantong area lies in the southeast of Jiangsu province,China.It has greatly theoretical and practical significance to regional planning,reasonable utilization of resources and economic development by studying the environmental changes in Nantong area since 7 000 a BP.This paper studied the environmental changes and effects of human activities since 7 000 a BP from following aspects by referring to related data and literature:(1) the role of sediment carrying capacity of the Yangtze River and the Yellow River to changes of Nantong area;(2) effect of tide,wave and marine current in the Yellow Sea on environmental changes of Nantong area;(3) the effect of human activates on the processes of environmental changes of Nantong area;(4) environmental changes of the process of Nantong area under sediment-tide-wave-marine current-human activities action.All above was mainly qualitative analysis.At last,the author proposed that further work should collect more borehole data in Nantong area which has been used in the past,by interpolating algorithm and paleo-geographical environment represented by different depth of borehole,to produce the extent of environmental changes in different stages.Combined with investigations,archaeological data,historical literature and distribution of ancient ruined site,detailed extent of environmental changes would be achieved.