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研究采用“GPS+测深仪”的数字化测量系统对河道进行测量,通过surfer软件进行成图处理,根据三维表达成果,分别计算目前地形体积和设计地形体积,进一步计算水下土方工程量。为水下复杂多变的地形提供了形象直观,计算精度高的计算方法。同时采用梯形规则、辛普森规则、辛普森3/8规则进行体积计算原理及误差分析研究。然后利用surfer软件建立水下地形三维模型,进行三维空间分析。
The digital measurement system of “GPS + depth sounder” was used to measure the river course and the mapping was processed by Surfer software. According to the results of three-dimensional expression, the current terrain volume and the designed terrain volume were calculated separately and the underwater earthwork volume was further calculated. For underwater complex and changeable terrain provides a visual and accurate calculation of the calculation method. At the same time using the trapezoidal rule, Simpson rule, Simpson 3/8 rule volume calculation principle and error analysis. Then use surfer software to build three-dimensional model of underwater terrain, three-dimensional space analysis.