基于无人机、无人船测量的小型水库库容分析——以梅家洪、红峰水库为例

Reservoir Capacity Analysis of Small Reservoirs Based on UAV and Unmanned Ship—A Case Study of Meijiahong and Hongfeng Reservoir

本文采用无人机、无人船对黄石市梅家洪水库、红峰水库开展了地形测量和库容计算,分析了三种主要库容计算方法,以三角网法基于LAS的数据集和抽稀后的数据计算库容变幅较小,梅家洪水库、红峰水库库容在CoPrecess2较CASS计算结果的均方差为2.13%和1.23%,且差异性主要在低水位;方格网法受数据顶点影响较大,使用三角网法内插方格网顶点其结果趋近三角网法计算的库容,在CoPrecess2方格网法计算的结果与三角网法结果趋于一致,而未使用三角网法内插顶点的CASS计算库容较三角网法有一定的差别,尤其在梅家洪水库均方差达到了9.99%,而红峰水库均方差为4.32%;等高线法受到溢洪道影响,在正常蓄水位以上无法产生闭合线而无法计算正常蓄水位以上库容,限制较多,仅有类似CASS专业少量软件支持该算法来计算库容。This article conducted topographic measurements of Meijiahong Reservoir and Hongfeng Reservoir in Huangshi City using drones and unmanned ships, and calculated their storage capacity. The article analyzed the main three storage capacity calculation methods, and calculated the storage capacity changes using the triangulation method based on the LAS dataset and diluted data. The mean squared deviation of the storage capacity of Meijiahong Reservoir and Hongfeng Reservoir in CoPrecess2 compared to CASS calculation results is respectively 2.13% and 1.23%, and the difference is mainly at low water levels;The grid method is greatly influenced by data vertices. The triangulation method interpolating grid vertices results in storage capacity is close to that calculated by the triangulation method. The results calculated by the CoPrecess2 grid method and the triangulation method tend to be consistent. However, the CASS calculation of storage capacity without the triangulation method has a certain difference compared to the triangulation method, especially in Meijiahong Reservoir where the mean square deviation reaches 9.99%, while in Hongfeng Reservoir 4.32%;The contour line method is affected by the spillway, and cannot generate a closed line above the normal water level to calculate the storage capacity above the normal water level. There are many limitations, and only a small number of professional softwares like CASS support this algorithm to calculate the storage capacity.