歷史時期撫河中下游河道變遷研究
[Abstract]:Based on the collection and arrangement of literature in the middle and lower reaches of Fuhe River, in addition to referring to the general records of the past dynasties, this paper also focuses on referring to the "Nanchang Prefecture Records of Wanli", "Zhengde Jianchang Prefecture Records" and other isolated local chronicles of the Ming Dynasty. In the course of the study, two field visits were carried out to confirm the relationship between the terrace development and the river channel swing. The theory and research methods of natural geography are used in the analysis of the law, scope and cause of river course change. Satellite photos and ancient maps are also used in this paper. Some of the river segments, such as the branch and the main branch of Shimen River in Jinxi County, need to be analyzed and judged with the help of satellite photos. Since the Tang Dynasty, the embankment break in Linchuan City and the restoration of some rivers in Nanchang area have been made use of ancient map. According to the historical records, according to the vicissitude characteristics of the middle and lower reaches of the Fuhe River during the historical period, it can be analyzed from the Nancheng to Linchuan section and the Linchuan to Nanchang section. 1. Nancheng-Linchuan section: the main river course flows through the alluvial alluvium to the valley plain. Three terraces were distributed along the river coast in turn, and the lateral erosion and swinging of the channel were obviously restricted by the first and second terraces, which was relatively stable in the historical period. The flow direction of the river is roughly the same as today. 2. Linchuan-Nanchang section: this section of the river mainly flows through the alluvial low plain, that is, Jiangxi's largest Ganfu impact plain, and its estuarine area is located in the northern part of the Ganfu impact Plain, that is, the Poyang Lake Basin. Under the influence of the Neotectonic movement in Poyang Lake Basin since the Tertiary, the elevation and subsidence in the western part of the terrain caused the distribution of the first and second terraces to be unbalanced and the terraces of the third order undeveloped in Nanchang area. The secondary terraces along the main tributaries may be absent, the floodplain in the river valley area is more developed, and the river channel lacks the constraints of terraces. This geological structure and geomorphologic environment determine that the channel is prone to break the embankment or form a branched channel. From the historical point of view, the main channel of Nanchang section of the lower reaches of Fuhe River has changed frequently, the swinging of the note (Gan) River and the note (Poyang) lake is uncertain. Since the Ming and Qing dynasties, there have been many distributary channels coexisting in Nanchang region, the water situation is complex and the water flow is disordered. Judging from the influence of river channel changes, the east bank of the Linchuan section of the Fuhe River from the Tang to the Qing dynasties has been seriously eroded. Therefore, from the Tang to the early Qing Dynasty, there has been a flood prevention embankment along this section of the river, and it has continued to renovate Qianjin Pei for nearly a thousand years. This is documented in all dynasties. During the Ming and Qing dynasties, the side erosion was strengthened, such as the frequent construction of embankments in the west bank of the Nancheng section in the Ming and Qing dynasties, and the construction of a large number of dikes in Nanchang area. The reasons are related to the rapid growth of population, the destruction of ecological environment and the regional climate cooling during the Ming and Qing dynasties. In addition, the influence of river channel changes on waterway transportation can not be ignored. In history, the rise and fall of Kongjiadu (post) in Fuzhou area along Fuhe River and Wuyang du (post) in Nanchang area are closely related to the vicissitude and wobble of this section of river channel.
【學(xué)位授予單位】:江西師范大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:K29;TV147
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