Abstract: In order to carry out the recheck of reservoir capacity curve,this article takes a medium-sized reservoir in Shandong Province as an example.Fourth-grade-leveling survey is used to measure the elevation around the reservoir to the national high-level benchmark.Then,unmanned aerial vehicle low altitude aerial photography and unmanned ship underwater measurement are used to obtain the three-dimensional spatial coordinate data of the reservoir terrain,and a three-dimensional model of the reservoir area is generated.With the help of the 3D model,a topographic map and contour lines of the reservoir area are drawn.The calculated storage capacity directly extracted from the 3D model of the reservoir area is compared with the storage capacity calculated by the DEM grid method generated by the terrain points and feature points around the reservoir area.The results show that the area and storage capacity calculated by the two methods are basically consistent,which verifies the accuracy of the contour line method calculation results extracted from the model and provides technical reference for the review of the reservoir capacity curve.

Key words: UAV survey, unmanned ships, DEM, contour method, recheck of reservoir capacity curve