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长江三峡上口的臭盐碛是川江秋季著名的淤沙阻航河段,因其下游紧接狭窄的夔峡河谷,洪水季壅水,大量泥沙沉积.当秋季水位退落时,因巨量淤沙来不及冲走造成水深不足而使船舶停航,通常称这时期为走沙期.每当走沙期,由于淤沙占据河床,过水断面缩小,流速骤增,急流切割沙洲,激起汹涌沙浪,水色暗黑,水声隆隆,沙堆此起彼伏,过往行船只得停船1～3天.曾有两艘轮船在这里因触搁沙包后,被淤沙和急流倾覆而葬身江底. 1954年奉节航道段成立后,为了在走沙期给轮船探寻通道,每年都要抽调4支船和近40人驻
The smelly salt moraine of the upper reaches of the Three Gorges of the Yangtze River is a well-known sediment-blocking riverway in the autumn of the Chuanjiang River, because of its immediate downstream of the narrow Qiongxia River valley, flood season water and large amount of sediment. When the autumn water level receded, The amount of sediment is too late to wash away resulting in inadequate water depth and the vessel suspended, often referred to as this period for the sand. Whenever the sand period, the silt occupied the riverbed, cross-section reduction, rapid increase in flow rate, Rough sand waves, dark aqua, water rumbling, sand piles one after another, in the past had to stop the boat 1 to 3 days .Two vessels here because of contact with the sandbags, was torn silt and rapids and buried in the river .1954 After the establishment of Fengjie section of the navigation channel, four vessels and nearly 40 troops have to be deployed each year