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水文曲线的自动绘制及图形储存是水文工作中的难点,专门开发的水文曲线绘图系统能够自动绘制多种水文曲线,包括水位—流量关系线、单断沙关系线、过程线、河道大断面图及跨年度的曲线套绘;系统设计采用C++编程语言、嵌入式数据库以及计算机图形技术,界面友好,操作方便.对水位—流量关系线精度进行的分析表明,系统误差、随机不确定度、符号检验、适线检验、偏离值检验等均达到有关规范要求.系统的开发填补了自动绘制水文曲线的技术空白,为黄河水文电子图库的建立提供了技术支持.“,”The automatic drawing and graphics storage hydrological curve arethe difficult work in hydrology. The hydrological curve drawing software can automatically draw a variety of hydrological curves, including stage-discharge relation curve, index and cross-section average sediment concentration relation curve,hydrograph,channel cross-section curve and multi-year curve drawing. The system design uses C++programming language,embedded database and computer graphics technology with friendly interface and convenient operation.Through the a-nalysis of the precision of stage-discharge relation curve,it shows that the values of systematic error, random uncertainty, mark test, curve fitting test and deviation-data test all have met the standard requirements.The development of the program fills the technical blank of the automatic plotting of hydrological curves and provides technical support for the establishment of the Yellow River hydrological electronic chart library.