流量Ⅲ型误差的分析

Analysis of Type Ⅲ Error of Flow

以表达流量精确度的综合标准差公式为依据,用置信水平85%与综合计算提高了误差指标值的安全程度和准确程度,应用15个测站296次流量Ⅲ型误差试验资料分析确定了单站计算法与综合计算法两套流量Ⅲ型误差实用方案,有效地控制了流量误差并提高了流量精度,且综合计算法优于单站计算法。分析研究成果明显改进了河流流量测验规范的相关规定,为其修订提供了重要依据。

Based on the comprehensive standard deviation formula measuring the accuracy of flow, the safety and accuracy of the error index val- ues have been improved with a confidence level 85% and comprehensive calculation. Also, the two practical solulions measuring type Ⅲ error using mono-static calculation method and comprehensive calculation method were given based on the analysis of the experiment data of 296 type Ⅲ errors at the 15 stations, which has effectively controlled the error of flow and improved the accuracy of flow. And the comprehensive calculation method is better than the mono-static calculation method. The conclusion of the research has largely improved the related provisions of river flow measurement specification and also provided important bases for the modification.