Reservoir capacity curve measuring method based on three-dimensional laser scanning

Abstract

The invention discloses a reservoir capacity curve measuring method based on three-dimensional laser scanning. The reservoir capacity curve measurement method comprises the following steps: S1, fieldinvestigation; S2, designing a scanning route; S3, determining the number of observation stations and the positions of the stations; S4, scanning and collecting field data; S5, splicing the measurement station data; S6, data preprocessing: processing vegetation, noise and the like and carrying out filtering preprocessing on the point cloud data acquired by scanning; S7, data thinning: thinning thepoint cloud data after splicing and denoising are completed; S8, model construction: establishing a high-precision three-dimensional terrain model by utilizing the thinned point cloud data; and S9, calculating a reservoir capacity curve: calculating the reservoir capacity curve according to the established high-precision three-dimensional terrain model. According to the method, the data is obtained in a three-dimensional laser scanning mode, the scanning time of each station is short, the workload required by reservoir capacity curve surveying and mapping is greatly reduced, meanwhile, basedon the reservoir capacity curve calculation method, errors can be effectively reduced, and a more accurate reservoir capacity curve is obtained.

Description

technical field [0001] The invention belongs to the field of surveying and mapping engineering, in particular to a storage capacity curve measurement method based on three-dimensional laser scanning. Background technique [0002] In the process of reservoir design and construction, storage capacity and water level are a group of very important parameters. Their accuracy will affect the normal operation of the reservoir. In the process of reservoir and dam design and construction, it is necessary to obtain certain Group discrete data, derive and establish a mathematical model between water level and storage capacity. Calculate the corresponding storage capacity according to the different areas of the reservoir at different elevations, and obtain the corresponding storage capacity curve. The reservoir capacity curve is calculated and drawn based on the reservoir area data obtained at different water levels through engineering surveys, and it is an important basis for reservoi...

AI Technical Summary

Problems solved by technology

[0004] The existing survey calculations have the following defects: First, the workload is large: a large amount of surveying and mapping work is required manually to make terrain and contour lines, and the labor cost is relatively large; second, the surveying and mapping terrain has large errors: manual surveying and mapping photography , Aerial photogrammetry and aerospace remote sensing surveying and mapping have relatively large errors in topographic maps, and it is difficult to guarantee the accuracy of subsequent storage capacity curve calculations

3. The calculation method has large errors: the current mainstream measurement and calculation methods have certain limitations, and cannot guarantee that the calculation results will achieve high accuracy.

Images