Abstract: Reservoir capacity curve is the basic data basis of reservoir regulation and storage management, and its accuracy affects the play of various functions of the reservoir. As time goes by, the original storage capacity curve can not meet the management requirements, and the traditional storage capacity curve calculation method is inefficient and the updating cost is high. In order to solve this problem, a storage capacity curve updating method based on airborne LiDAR and water level monitoring is proposed in this paper. The method adopts LiDAR aerial photography during dry season, and realizes the update of the storage capacity curve through the processing of airborne LiDAR point cloud data, the construction of DEM model, and the extraction of water-area-storage capacity. The experimental results show that the storage capacity curve obtained by the method is consistent with the practice, the results are correct, scientific and reliable, and can realize the rapid update of the storage capacity curve, which can provide decision-making basis for water resources management, regional flood water regulation and storage, drought relief and so on.

Key words: LiDAR, water level-area-storage capacity, storage capacity curve, DSM, DEM