Dam leakage positioning detection method based on water flow field disturbance

The invention relates to a dam leakage positioning detection method based on water flow field disturbance. The method comprises the following steps: carrying out underwater terrain sweeping survey on a dam front area; arranging a plurality of groups of test points near the suspected leakage points; drawing a change curve of the flow velocity and the flow direction of the arranged test points along with time; counting the minimum flow velocity, the maximum flow velocity, the average flow velocity, the minimum flow direction, the maximum flow direction and the average flow direction of each test point; according to a statistical result, analyzing whether the suspected leakage point has a leakage flow velocity characteristic or not; and carrying out at least one time of retest on the suspected leakage points which are preliminarily judged to have leakage. The method has the advantages that the flow velocity and the flow direction near the leakage position can be obtained, the method is more suitable for accurate