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用旁侧声纳、浅底层剖面仪,多普勒流速仪(ADP),对长江中下游(武汉到河口段)河床进行了走航式的勘测工作,获得了底床沙波形态的空间分布数据。根据波高参数可将底床沙波分成四类(I、II、III、IV),并剖析了与水面坡降-过水面积的关系。据沙波分布特征,并结合100个断面沉积物采集数据,以及水文实测,可将河床分为5段(A、B、C、D、E段)。
The lateral sonar, shallow bottom profiler and Doppler velocimetry (ADP) were used to survey the river bed in the middle and lower reaches of the Yangtze River from Wuhan to the estuary, and the spatial distribution of sand bed shape was obtained data. According to the wave height parameters, the sand bed can be divided into four types (I, II, III, IV), and the relationship between the slope gradient and the water-passing area is analyzed. According to the characteristics of the sand wave distribution, combined with the data collected from 100 sediments and hydrological measurements, the riverbed can be divided into 5 sections (A, B, C, D and E).