It can improve the navigational condition of the upper reaches of the Yangtze River. 三峽工程可以改善長江上游航道的通航條件。
The low water level of Yichang Section is a characteristic parameter which reflects the navigation condition of Gezhouba ship locks. 摘要宜昌斷面的枯水水位是反映葛洲壩船閘通航條件的特徵參數。