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| 黄山北麓青弋江发育原因及其与长江贯通的关系 | |
| 引用本文： | 胡春生,田景梅,何成邦,周迎秋,徐光来.黄山北麓青弋江发育原因及其与长江贯通的关系[J].地理科学,2021,41(10):1862-1872. |
| 作者姓名： | 胡春生 田景梅 何成邦 周迎秋 徐光来 |
| 作者单位： | 1.安徽师范大学地理与旅游学院，安徽 芜湖 241002 2.江淮流域地表过程与区域响应安徽省重点实验室，安徽 芜湖 241002 |
| 基金项目： | 安徽省自然科学基金项目(2108085MD127);安徽师范大学博士科研启动项目(2018XJJ43);国家自然科学基金项目(41301011) |
| 摘 要： | 基于前期研究工作成果和外部环境变化因素分析，探讨了青弋江发育原因及其与长江贯通的关系。研究表明：① 昆黄运动可能在长江中下游地区产生了区域构造响应，导致研究区断层被激活而发生了较大幅度的断块抬升运动，进而为青弋江发育提供了下切驱动力，驱动了青弋江发育；② 东亚夏季风在约1.3 Ma和约0.9 Ma发生的2次显著阶段性减弱事件，引起区域降水量显著增加，进而为青弋江发育提供了下切媒介和持续水流，控制了青弋江发育年代；③ 青弋江发育与长江贯通可能都是昆黄运动区域构造响应与东亚夏季风强度阶段性减弱共同作用的结果，并且长江贯通后所形成的新局部侵蚀基准面也可能促进了青弋江发育，因此青弋江发育年代在一定程度上能反映长江贯通年代。 |
| 关 键 词： | 青弋江 河流发育 昆黄运动 东亚夏季风 长江贯通 黄山北麓 |
| 收稿时间： | 2020-10-11 |
| 修稿时间： | 2021-05-20 |
Development Causes of the Qingyijiang River on the Northern Piedmont of the Huangshan Mountain and Its Relationship with the Channelization of the Yangtze River |
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| Hu Chunsheng,Tian Jingmei,He Chengbang,Zhou Yingqiu,Xu Guanglai.Development Causes of the Qingyijiang River on the Northern Piedmont of the Huangshan Mountain and Its Relationship with the Channelization of the Yangtze River[J].Scientia Geographica Sinica,2021,41(10):1862-1872. | |
| Authors: | Hu Chunsheng Tian Jingmei He Chengbang Zhou Yingqiu Xu Guanglai |
| Institution: | 1. School of Geography and Tourism, Anhui Normal University, Wuhu 241002, Anhui, China 2. Anhui Key Laboratory of Earth Surface Processes and Regional Response in the Yangtze-Huaihe River Basin, Wuhu 241002, Anhui, China |
| Abstract: | The Qingyijiang River which rises on the Huangshan Mountain, flows northward through the northern piedmont of the Huangshan Mountain and eventually discharges into the Yangtze River at Wuhu City, Anhui Province, the eastern China. As the longest right-bank tributary of the lower reaches of the Yangtze River, the Qingyijiang River is a typical representative of the small and medium rivers in the Eastern monsoon area of China, providing a typical case for studying the developmental history of the small and middle rivers. Based on the results of previous studies and the analyses of external environmental factors, the development causes of the Qingyijiang River and its relationship with the channelization of the Yangtze River were emphatically analyzed and discussed. The research results showed that: 1) The Kunlun-Huanghe Movement might affect the middle and lower reaches of the Yangtze River and result in the activations of regional faults and larger regional block uplift movements on the northern piedmont of the Huangshan Mountain. This regional uplift further provided the downcutting driving force and thus drove the development of the Qingyijiang River. Therefore, the regional tectonic responses to the Kunlun-Huanghe Movement might drive the development of the Qingyijiang River; 2) The East Asian summer monsoon experienced two significant stepwise weakening events at approximately 1.3 Ma and approximately 0.9 Ma which led to the remarkable increase of regional precipitation within the study area. This increase of regional rainfall further provided the incision media and sustained water, and finally initiated the development of the Qingyijiang River. Therefore, the stepwise weakening events of the East Asian summer monsoon might control the development age of the Qingyijiang River; 3) Both the development of the Qingyijiang River and the channelization of the Yangtze River might be a combined result of the regional tectonic responses to the Kunlun-Huanghe movement and the stepwise weakening events of the East Asian summer monsoon intensity. In addition, a new local base level of erosion served by the Yangtze River after its channelization might also promote the development of the Qingyijiang River. Therefore, the development age of the Qingyijiang River which could reflect the channelization age of the Yangtze River to a certain degree supported the viewpoint that the Yangtze River had been established during the period from the late Early Pleistocene to the early Middle Pleistocene. This study provides a case and reference for the studies of the small and medium river development in the Eastern monsoon area of China. |
| Keywords: | the Qingyijiang River river development Kunlun-Huanghe Movement East Asian summer monsoon channelization of the Yangtze River the northern piedmont of the Huangshan Mountain |
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