水位负偏分布频率计算方法分析与研究  

Analysis of Negative Deviation Distribution Frequency for Water Stage Calculation

作　　者：张涛[1] 王世勋 王祥三[1] 雒文生[1] 

机构地区：[1]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [2]福建棉花滩水电开发有限公司,福建龙岩364000

出　　处：《水文》2008年第2期5-9,共5页Journal of China Hydrology

基　　金：国家自然科学基金项目资助(30490231)

摘　　要：由于水文样本如汛期坝前最高水位系列常为负偏态分布,用传统的频率配线计算,则相应的理论累积频率曲线与经验点的分布差别较大.本文分析了在样本系列出现负偏态时求解理论频率曲线的方法,其配线效果较好.考虑水库汛期最高水位分布常为负偏,和上、下端区间为有限的情况,本文提出引用多项式拟合经验点的概率理论频率曲线,经过初步检验,效果较好.Because the maximum stage behind dam in flood period is often in negative deviation, the difference between the theoretical and empirical frequency plotting is bigger when making curve fitting computation with the traditional frequency. This paper introduced a method of attaining theoretic frequency curve when the sample series are distributed negative deviation, which has got a better effect. Considering the maximum stages in flood period are usually distributed in negative deviation with the upper and lower extremities, this paper proposed polynomial curve fitting match the empirical frequency plotting.

关 键 词：负偏分布 P-Ⅲ 多项式拟合 

分 类 号：P333[天文地球—水文科学]