摘要
利用黑河上游祁连站、托勒站、肃南站和野牛沟站1960—2009年月平均气温和降水资料,分别计算不同时间尺度下各站50年的帕默尔干旱指数(PDSI)和标准化降水指数(SPI)。对比分析表明:在年尺度上,黑河上游4个站点的PDSI指数和SPI指数存在显著的正相关,都能较好的描述黑河上游干旱情况;在月尺度上,各站PDSI指数和SPI指数的相关系数存在显著差异,该差异随着月份的不同而不一样。夏季和秋季是黑河上游全年发生严重干旱和极端干旱的高峰期,如果不及时做好防旱工作,会对该地区畜牧业产生很大的影响。
Based on the monthly mean temperature and precipitation data from 4meteorological stations（Qilian,Yeniugou,Tuole and Sunan）in the upper reaches of Heihe River Basin during the period from 1960to2009,we calculated the Palmer drought severity index（PDSI）and standard precipitation index（SPI）for each station at different time scales.The results show that at the annual scale,both PDSI and SPI could reasonably describe drought condition in the upper reaches of the Heihe River Basin;at the monthly scale,there is a significant difference in the correlation coefficients between the PDSI and SPI for each station,which varies with the month.Severe droughts occurring most frequently in the summer and autumn and thus implementation of the drought management practices is critical for alleviating drought impacts during these seasons in the study region.
出处
《水土保持研究》
CSCD
北大核心
2017年第2期132-136,共5页
Research of Soil and Water Conservation
基金
国家自然科学基金重点项目"黑河上游土壤水文异质性观测试验及其对山区水文过程的影响"(D010102-91125010)
"西北农牧交错带土地利用/覆被变化对地表水热过程的影响"(41530752)
关键词
干旱特征
帕默尔干旱指数
标准化降水指数
黑河上游
drought characteristics
Palmer drought severity index
standard precipitation index
upstream of the Heihe River
