Based on the finite difference method, the authors established the forward model for the detection of sediment deposit in the river course, simulated two typical detection mode for the model, and obtained the effect of values of apparent resistivity and detection result of sedi-ment deposit for different detection mode. Through a comparison with the inversion of apparent resistivity profile for numerical simulation method and indoor flume test, the feasibility and rationality of the DC resistivity method in detecting sediment deposit in the river course were studied.%基于有限差分法，建立了水中直流电阻率法对河道淤积层探测的正演模型，并模拟了两种典型的测量方式，分析了测量方式对视电阻率值与淤积层探测结果的影响，通过数值模拟法与室内水槽试验法视电阻率反演结果的对比，研究了水中直流电阻率法对河道淤积层探测的可行性。
展开▼
