Method and device for determining lake inlet flow of barrier lake

The invention relates to the technical field of geological disasters, discloses a method and device for determining the lake inflow of a barrier lake, and aims to solve the problem that an existing barrier lake inflow analysis method is insufficient in applicability for emergency disposal of the barrier lake under different data conditions, and the method comprises the following steps: obtaining basic information of the barrier lake; obtaining digital elevation model data of a watershed above a barrier body of the barrier lake, and calculating a first catchment area of the barrier body; judging whether the upstream main stream of the barrier lake is provided with a hydrometric station, if so, further judging whether the percentage of the difference between the second catchment area and the first catchment area of the hydrometric station is less than a first threshold value, and judging whether the upstream basin of the hydrometric station is similar to the runoff formation condition of the interval from the h