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一、基本情况长江南京段自1911年起,于浦口下关两岸先后建筑码头、工厂与铁路,人为的缩狭了江身,形成长约3公里的窄段,最窄处江面宽仅1,100余公尺,而在窄段上下游宽度则达3,000公尺左右。由于江槽断面的骤变产生了沙洲,沙洲又因每年洪枯水量和水位的变动,经常有消长变迁,一般是逐渐推向下游,但至最窄段则不易发展以至于消失。因沙洲的消长变迁而造成主流深泓的变迁,以致引起了两岸的崩坍或淤积。
I. Basic Information Since 1911, the Nanjing section of the Changjiang River has constructed wharves, factories and railroads at the lower reaches of the Pukou Shimonoseki, narrowing the riverine artificially and forming a narrow section of about 3 kilometers. The width of the narrowest river is only 1,100 Yu meters, while in the narrow section of the upstream and downstream width of up to 3,000 meters. As a result of the sudden change of the river channel section, the sandbar has been formed. Due to the annual flood and water level fluctuations, the sandbar often changes in length and breadth. Generally, the sandbar is gradually pushed downstream. However, it is not easy to develop and disappear by the narrowest section. Due to changes in the growth and decline of Shazhou, the change in the mainstream of the country has caused the collapse or siltation of both sides of the Taiwan Strait.