摘要
为探究季节性干旱对贵州省农业生产造成的影响,基于贵州省9个气象站点1960-2010年逐日降雨资料计算的标准化降水指数（SPI）,使用Mann-Kendall趋势检验和GIS克里金插值等方法,分析了该区域近51a以来的干旱时空分布特征。结果表明：近51a来贵州省内大部分站点的月尺度SPI值在4-5月和9-10月呈下降趋势;年尺度SPI值呈减小趋势,干旱影响站次比呈上升趋势,干旱范围和干旱程度有加大趋势;1年四季中干旱频率空间分布在不同地域上显示出了较大差异性。
In order to analyze the influence of meteorological drought on agricultural production in Guizhou Province,the standard precipitation index（ SPI） calculated by precipitation data was introduced to describe the drought characteristics at 9 meteorological stations in Guizhou Province during 1960- 2010. The frequency of drought,Mann- Kendall trend test and the Kriging interpolation were applied to analyze the spatial and temporal distribution characteristics of meteorological drought. The results indicated that the values of standard precipitation indices in spring and autumn were decreased. Meteorological drought had an increasing tendency during the last 51 years,the area and the degree of drought were enlarging. The spatial distribution of drought frequency in different seasons confirmed the diversity of drought frequency in different regions.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2015年第8期82-86,共5页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金项目(51009101)
水利部公益性行业科研专项经费项目(201101039)
南方丘区节水农业研究四川省重点实验室开放基金(项目编号:JSSYS2014-C)资助
关键词
干旱
贵州省
降水
时空分布
meteorological drought
Guizhou Province
precipitation
temporal and spatial distribution
