| 黄河上游的阶地与水系变迁 |
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| 引用本文： | 杨达源,王云飞.黄河上游的阶地与水系变迁[J].地理科学,1996,16(2):137-143. |
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| 作者姓名： | 杨达源 王云飞 |
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| 作者单位： | 南京大学大地海洋科学系 南京210093(杨达源，吴胜光)，中国科学院南京地理与湖泊研究所 南京210008(王云飞) |
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| 基金项目： | 中国科学院西安黄土与第四纪地质研究室的资助. |
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| 摘 要： | 黄河上游于贵德盆地和共和盆地中有７级阶地，再往上游方向存在阶地级数递减的趋势。共和盆地中还有３级古黄河阶地，黄河上游水系是通过一级级河流袭夺相继贯通的，共和盆地与贵德盆地间的黄河古道始于中更新世末期，龙羊峡河段始于６０ｋａ Ｂ．Ｐ．前后，玛多与唐乃亥 间的峡谷河段是２０ｋａ Ｂ．Ｐ．才贯通的。
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| 关 键 词： | 河流阶地 河流袭夺 水系变迁 黄河上游 河流 |
ON RIVER TERRACES OF THE UPPER REACHES OF THE HUANGHE RIVER AND CHANGE OF THE RIVER SYSTEM |
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| Yang Dayuan,Wu Shengguang.ON RIVER TERRACES OF THE UPPER REACHES OF THE HUANGHE RIVER AND CHANGE OF THE RIVER SYSTEM[J].Scientia Geographica Sinica,1996,16(2):137-143. |
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| Authors: | Yang Dayuan Wu Shengguang |
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| Abstract: | The upper reaches of the Huanghe (Yellow) River, a length of 1350 km from Gyaring Lake to Guide county, cuts through the great slope of the northeast part of the Qinghai-Xizang (Tibet) Plateau and it runs through a few of Mesozoic-Cenozoic depositional basins, for example, Guide basin, Gonghe basin, Xinghai basin, Zoige basin, Ngoring-Gyaring basin etc. , the sections between them are a series of gorges of the Huanghe Riv-er.Based on author's investigation, there is a terrace of 7 steps in the Huanghe River val-ley by Guide county, a terrace of 3 steps being formed by the ancient Huanghe River and 7 steps in Gonghe basin, 6 steps by Gamao Yangqu town, 5 steps by Tangnaihai town, Xinghai County, 3 steps by Maqu town, Gansu Province, and one step by Ngoring-Gyaring Lake.The overall upper reaches of the Huanghe River was linked up by a series of the stream captures occurred after strongly uplifting of the Qinghai-Xizang area into a plateau. A section of the ancient Huanghe River through the place Gahaitan located on northeastern Gonghe basin towards east into Guide basin was developed during the end of Middle Pleistocene to the middle of the Late Pleistocene, and then it migrated towards southeast to the place Longyangxia Gorge about 60000 years ago. And the gorge from Maqu to Tangnaihai was linked up about 20000 years ago. |
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| Keywords: | River terrace Stream capture Change of stream system Upper reaches of the Huanghe River |
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