人民黄河Issue(10)：29-34,6.DOI:10.3969/j.issn.1000-1379.2015.10.008
河南省降水量年内分配的不均匀性及变化规律
Analyses on Annual Inhomogeneity Characteristic of Precipitation and Its Variation
摘要
Abstract
Based on the measured monthly average precipitation date of Henan Province from 1953 to 2006,Gini coefficient of precipitation (G)and Lorenz asymmetry coefficient (S ) were calculated by Lorenz curve to assess the inhomogeneous degree of the precipitation distribution and provide an explanation of the basis for the underlying inequalities in precipitation distribution. Variations in the trends, abrupt change and periodic temporal patterns of the Gini coefficient and Lorenz asymmetry coefficient were analyzed via the Mann-Kendall methods and wavelet analysis. The results show that the value of G varies from 0. 34~0. 62 and average annual value is 0. 47,indicating that the annual distribution of precipitation is heterogeneous;the value of S varies from 0. 64~1. 27 and average annual value is 0. 96,the year Lorenz asymmetry coefficient (S <1)accounted for 78%,indicating that it has a greater percentage of the precipitation in a few rainy months. G had a non-significant,decreasing trend and the abrupt change is in 1958,show that the inhomogeneous degree of the precipitation distribution has a significant decrease. S has a significant decreasing trend that exceeding the 0. 01 percentile. The abrupt change of S is in 1960,show that the percentage of the precipitation in a few rainy months has a significant increase. The first order main period of G and S is 24 years and 6 years respectively.关键词
基尼系数/洛伦茨不对称系数/变化规律/不均匀性/降水量/河南省/1953-2006年Key words
Gini coefficient/Lorenz asymmetry coefficient/variation/inhomogeneity/precipitation/Henan Province/1953-2006分类
天文与地球科学引用本文复制引用
刘欢,左其亭,马军霞..河南省降水量年内分配的不均匀性及变化规律[J].人民黄河,2015,(10):29-34,6.基金项目
国家自然科学基金资助项目（51279183）；河南省科技攻关计划项目（132102310528）；河南省高校科技创新团队支持计划项目（13IRTSTHN030）。 （）
