The measurement and estimation of suspended sediment using ADCP is based on the theory that the strength of acoustic return signal is directly proportional to silt concentration in water.
ADCP估测悬沙含量是基于声波的背散射强度正比于悬沙浓度的理论。
However in some rocky and earthy regions such as Beijing mountain region, traditional measurement method can not get the precise value of sediment concentration.
在以北京土石山区为代表的粗砂多砂区，传统的搅拌方法无法测得准确的含沙量。
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