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计算机应用的发展，推动了水文事业的发展，使水文工作者从繁重的水文数据处理中解放出来。介绍了开发泥沙悬移质颗粒级配计算程序的意义、程序设计思路、数学模型及其应用。采用泥沙悬移质颗粒级配计算程序具有操作简便、运算速度快、提高工作效益、减轻劳动强度等许多优点，避免了每张计算表格都需要一算二校的工序。由计算机输出的成果资料，数据统计正确，表面美观整洁，且更工整、更清晰，保存使用都很方便，能满足测站的需要
The development of computer applications has promoted the development of hydrological undertakings and liberated hydrological workers from the heavy hydrological data processing. The significance, programming ideas, mathematical models and their applications of developing sediment suspended particles grading program are introduced. Adopting the calculation program of sediment suspended particles grading has the advantages of simple operation, fast calculation speed, higher work efficiency and less labor intensity, which avoids the need of calculating two schools for each calculation table. Data output by the computer, the data is correct, clean and beautiful appearance, and more neat, more clear, easy to use and save, to meet the needs of the station