基于三角柱模型的库容计算方法研究  

Research on Storage Capacity Calculation Method Based on Triangular Column Model

作　　者：汪诗奇 王莹 宁德存 孙嘉骏 石晨辰 WANG Shiqi;WANG Ying;NING Decun;SUN Jiajun;SHI Chenchen(Institute of Information Technology,Power China Kunming Engineering Corporation Limited,Kunming 650051,China)

机构地区：[1]中国电建集团昆明勘测设计研究院有限公司信息技术研究院,云南昆明650051

出　　处：《测绘与空间地理信息》2022年第12期103-105,109,共4页Geomatics & Spatial Information Technology

摘　　要：传统的基于规则格网DEM的库容计算主要是利用四棱柱模型作为计算单元,再将计算区域内所有计算单元的体积进行累加,从而得到库容计算结果。但是,这种方式计算出的结果与参考值存在较大差异;另外,此种方式未考虑到分层计算时,部分区域地形底面超出计算顶面的情况,从而导致计算结果不准确。针对这一问题,本文提出了利用三角柱模型作为计算单元的改进方法。首先对传统的四棱柱模型计算方法进行了介绍,分析了其优缺点;然后对三角柱模型计算方法进行了详细阐述;最后利用实测数据对本文提出的方法进行验证。结果表明,本文提出的库容计算方法处理结果更接近参考值,说明了本文方法正确且有效。The traditional storage capacity calculation based on regular grid DEM mainly uses the four prism model as the calculation unit,and then the volume of all the calculation units in the calculation area is accumulated,so the calculation results of the storage capacity are obtained.However,the result calculated by this method is still different from the reference value.In addition,this method does not take into account the situation that the terrain surface in some areas exceeds the top surface of the calculation,which leads to inaccurate calculation results.In order to solve this problem,this paper proposes an improved method using triangular column model as the calculation unit.Firstly,the traditional calculation method of the four prism model is introduced,and its advantages and disadvantages are analyzed.Then the calculation method of the triangular column model is described in detail.Finally,the improved method proposed in this paper is verified by the experiment using actual data.The results show that the calculation result of improved method is more close to the reference value and the correctness and effectiveness of the improved method are explained.

关 键 词：库容计算 规则格网DEM 四棱柱模型 三角柱模型 

分 类 号：P208[天文地球—地图制图学与地理信息工程]