摘要
利用宁夏中部干旱带盐池、中宁、同心、海原4个站点1960—2015年共56年的气候资料月值数据,计算了各个站点春、夏、秋、冬及作物生长季的标准化降水指数(SPI)、标准化降水蒸散指数(SPEI)和K干旱指数,并比较了3种干旱指数的评估结果。结果表明:(1)除冬季外,3种干旱指数在其他时间尺度上相关性均较好,SPI和SPEI,SPEI和K指数在冬季的相关性较差。(2)春、夏及作物生长季,SPEI和K指数判别的干旱情况较接近,SPI判别的干旱程度略轻;秋冬两季,K指数判别的干旱程度最高,SPEI判别的干旱程度最轻。(3)4个站点春、夏、秋、冬及作物生长季的SPI、SPEI和K指数序列M-K法趋势分析结果相似,均能表示出宁夏中部干旱带干旱的变化趋势。(4)结合历史旱情资料,发现K指数相比于SPI、SPEI更能有效反映宁夏中部干旱带的干旱情况,其评估结果基本与历史干旱事实相符。
Based on the monthly meteorological data of four meteorological stations from 1960 to 2015 of the arid area of central Ningxia,indices of SPI,SPEI,and K of spring,summer,autumn,winter and crop growing season were calculated,and the assessment results of the three drought indices were compared.The results showed that:(1)three drought indices had good correlation each other at all time scales except winter and the correlations between SPI and SPEI,between SPEI and K index were poor in winter;(2)indices of SPEI and K were relatively similar in identification of drought in spring,summer and crop growing season,and K index had the highest degree of drought assessment in autumn and winter,followed by indices of SPI and SPEI;(3)M-K trend analysis results from the three drought indices were similar,which can indicate the trend of drought in the arid area of central Ningxia;(4)K index was more effective than SPI and SPEI,and its assessment results were basically consistent with historical drought facts.
作者
关静
梁川
赵璐
崔宁博
王春懿
GUAN Jing;LIANG Chuan;ZHAO Lu;CUI Ningbo;WANG Chunyi(State Key Lab of Hydraulics and Mountain River Engineering & College of Water Resource and Hydropower,Sichuan University,Chengdu 610065,China;Provincial Key Laboratory of Water-Saving Agriculture in Hilly Areas of South China,Chengdu 610066,China)
出处
《水土保持研究》
CSCD
北大核心
2018年第3期122-127,共6页
Research of Soil and Water Conservation
基金
"十三五"国家重点研发计划项目"西北典型农区高效节水灌溉技术与集成应用"(2016YFC0400206-03)
作者简介
第一作者:关静(1993-),女,甘肃平凉人,硕士研究生,主要从事水文水资源方面的研究。E-mail:1390338348@qq.com;通信作者:赵璐(1986-),女,四川南充人,博士,讲师,主要从事节水农业和水文气象方面的研究。E-mail:luya1121@163.com
