华北水利水电大学学报（自然科学版）2017，Vol.38Issue(2)：20-24,5.DOI:10.3969/j.issn.1002-5634.2017.02.005
1951-2013年周口地区降水时空变化特征研究
Temporal and Spatial Distribution of Precipitation in Zhoukou Area from 1951 to 2013
摘要
Abstract
In order to study the temporal and spatial evolution process of regional precipitation,based on the monthly precipitation data of 28 stations from 1951 to 2013,by using the method of empirical orthogonal function analysis,Morlet wavelet analysis and Mann-Kendall text,the precipitation in recent 63 years of Zhoukou area was analyzed at the sides of time series trends,periodicity,mutation and spatial distribution.The results show that:the spatial distribution of precipitation had three typical modes,they are the citywide consistent wet(dry)type,the southern wet(dry) and northern dry(wet) type and the eastern wet(dry) and western dry (wet) type,the citywide consistent wet(dry)type is the main precipitation distribution pattern in Zhoukou area,the most typical characterstics are the drier citywide precipitation in 1966 and the wetter citywide precipitation in 2003;The precipitation in Zhoukou area is diminishing from southeast to northwest;The mutation point of the annual precipitation variation occurred around the year of 1997,and the precipitation had a periodical features of 21 years.The results provide a theoretical basis for the agricultural production,drought and flood warning and disaster prevention and reduction.关键词
降水/变化特征/EOF分析法/Mann-Kendall检验法/Morlet小波分析法/周口地区Key words
precipitation/variation characteristics/the methods of empirical orthogonal function analysis/the method of Mann-Kendall test/the method of Morlet wavelet analysis/Zhoukou area分类
建筑与水利引用本文复制引用
马建琴,和鹏飞..1951-2013年周口地区降水时空变化特征研究[J].华北水利水电大学学报（自然科学版）,2017,38(2):20-24,5.基金项目
河南省高校科技创新人才支持计划(15HASTIT046) （15HASTIT046）
河南省科技攻关项目(152102110095) （152102110095）
河南省高等学校重点科研项目(15A570008). （15A570008）
