摘要
基于1951～2006年湖北省各气象站点的月降雨资料,采用信息熵方法分析了湖北省各站点的降雨时空变化规律,并通过了经验正交函数分解、Mann-Kndall秩次相关检验法的验证。结果表明,1951～2006年湖北省年平均降雨量总体呈下降趋势,但下降趋势不明显;西部地区降雨时空变异性较大,但全省的降雨时空变异性小,可为未来的农业和水文预测预报工作提供参考。
Based on the monthly precipitation data collected by weather stations in Hubei Province from 1951 to 2006 years,information entropy method is used to analyze temporal and spatial changes of precipitation characteristics and the results are verified by empirical orthogonal function and Mann-Kendall method test.The results show that the average annual rainfall in Hubei Province appears downward trend in the years 1951～2006,but the downward trend is not obvious;while spatial and temporal variation of rainfall in the western region is larger,but it is small for the whole Province.Thus,it provides reference for hydrological and agricultural forecasting in the future.
出处
《水电能源科学》
北大核心
2011年第1期6-8,共3页
Water Resources and Power
基金
国家自然科学基金资助项目(40701024)
关键词
降雨
时空变化
信息熵
经验正交函数
湖北省
rainfall
temporal and spatial variation
information entropy
empirical orthogonal function
Hubei Province
