【摘要】 河道的冲淤量及其分布是相关工程规划设计和防洪决策的基本依据,在生产实践中,冲淤计算一般是采用断面地形法。随着GIS技术的发展,三维表面的建模和表面分析已逐渐成熟,为推广网格地形法计算河槽冲淤量创造了条件。该文通过对比断面地形法、网格地形法两种方法计算的河道冲淤量,分析其误差来源及解决方法,评估其方法的适宜性和可靠性,得出GIS支持下的网格地形法计算河道冲淤可视化强,提高了效率和精度。更多还原

【Abstract】 The riverbed erosion-deposition amount and its distribution is the basis for engineering design,flood prevention and decision-making.In practice,the section topographical method is widely adopted in the calculation.With the development of GIS technology,modeling and analysis of 3Dsurface has been gradually mature,which creates the condition for promotion of grid topographical method.In this paper,the riverbed erosion-deposition amount has been calculated and comparative analyzed based on section topographical method and grid topographical method.By analyzing error source and solution method,estimating suitability and reliability,it is shown that the grid topographical method based on GIS has higher visualization,efficiency and accuracy.更多还原