| 渭河流域3 100年前资源退化与人地关系演变 |
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| 引用本文： | 黄春长.渭河流域3 100年前资源退化与人地关系演变[J].地理科学,2001,21(1):30-35. |
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| 作者姓名： | 黄春长 |
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| 作者单位： | 陕西师范大学旅游与环境学院, 陕西 西安 710062 |
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| 基金项目： | 国家自然科学基金项目(40071006)；教育部骨干教师资助计划项目(2000第65号)。 |
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| 摘 要： | 渭河流域全新世古土壤S
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| 关 键 词： | 气候变化 土地利用 社会影响 全新世 渭河流域 |
| 文章编号： | 10000690(2001)01-0030-06 |
| 修稿时间： | 2000年1月12日 |
The Deterioration of Land Resources and the Change in Human-Earth Relationships in the Weihe River Basin at 3100 a B.P. |
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| HUANG Chun-chang.The Deterioration of Land Resources and the Change in Human-Earth Relationships in the Weihe River Basin at 3100 a B.P.[J].Scientia Geographica Sinica,2001,21(1):30-35. |
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| Authors: | HUANG Chun-chang |
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| Abstract: | The boundary between palaeosol S0 and loess L0 represents theshift from a phase with strong pedological process to a period of accelerated eolian dust deposition in the Weihe River Basin between the middle and late Holocene. This was caused by an abrupt climatic change from the period dominated by southeastern monsoon to the period dominated by northwestern monsoon. Because of this change, soils have been deteriorated in their fertility, droughts, dust storms, river desiccation and water shortage have been frequent. These affected the nomadism upper and middle reaches, and arable farming of the Predynastic Zhou in the Weihe River Basin. Land-use was, therefore, shifted from arable farming to nomadism in the upper and middle reaches of the basin. Due to the southern migration of the nomadism, the people of the predynastic Zhou of arable farming community was forced to move south to the Guanzhong Basin, and established their capital city“Qiyi”on the Zhouyuan loess tableland. The deterioration of land resouces also caused famine and social instability, and later, the clapse of the Shang Dynasty in the lower reaches of the Yellow River. Due to technical reasons, the S0/L0 boundary has not been precisely dated by 14C or TL dating methods. Each author takes a different age between 3 500-2 500 a B.P. for the S0/L0 boundary and the abrupt monsoonal climatic change represented. Through stratigraphic studies, with consideration of the dates acquired from the palaeosol and the cultural remains around the S0/L0 boundary in the loess profiles, and the historical events and the newly published historical timetable of the Xia, Shang and Zhou dynasties, it is concluded that the S0/L0 boundary and the monsoonal change represented could be dated to calendar year 1 150 B.C. ( 3 100 a B.P.) or 14C dating 3 030±80 a B.P.. This would facilitate the higher resolution studies of the environmental change and the evolution of the human-environment relationship in the Weihe River Basin. It should be noted that there was a period with increased terrestrial dust deposition in the Greenland ice between calendar year 3 100 and 2 400 a B.P.. The change in the atmospheric circulation recorded in Greenland ice could have certain connections with the abrupt monsoonal climatic shift recorded by the S0/L0 boundary in the Weihe River Basin which occupies the southern part of the Loess Plateau. |
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| Keywords: | Climatic change Land use change Social impact Holocene Weihe River Basin |
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