基于帕默尔干旱指数的云南地区干旱评价  

Drought Analysis of Yunnan Province Based on PDSI Index

作　　者：曹一梅[1] 

机构地区：[1]云南省水文水资源局昆明分局,云南昆明650051

出　　处：《水电能源科学》2013年第1期5-7,共3页Water Resources and Power

摘　　要：基于云南省昆明站、楚雄站、蒙自站、腾冲站及德钦站5个气象站1951～2008年气象资料,运用帕默尔干旱指数法分别计算各站逐月干旱指数,并统计各站年、季发生干旱的频率。结果表明,1951～2008年期间,德钦站发生干旱的频率较大,楚雄站发生干旱的频率相比于其他4站较低,但其发生极端干旱的频率高于其他4站;昆明站秋季易出现干旱,发生干旱的频率为29.3%,腾冲站春季较易发生干旱,发生干旱的频率为32.9%,蒙自站、德钦站及楚雄站均在冬季易出现干旱情况,3站发生干旱的频率分别为37.9%、37.0%、27.4%,楚雄站四季发生极端干旱的频率均大于其他4站。Based on the data of meteorological station during 1951 to 2008 at five stations （Kunming, Chuxiong, Mengzi, Tengchong, Deqin） in Yunnan province, the Palmer drought index method is used to calculate the annual and monthly Palmer drought index of each station. And then the annual and seasonal drought frequency of each station is counted. The results show that during 1951 to 2008, Deqin station is easy to occur drought while Chuxiong station has the lowest drought frequency; compared to the other four stations, occurring frequency of the extreme drought is highest in Chuxiong station; in Kunming station, the drought is easy to occur in autumn and its frequency can be reached 29.3 % ; in Tengchong station, it is easy to occur in spring and its frequency can be reached 32.9% ; the drought situation are easy to occur in winter in Mengzi, Deqin and Chuxiong station; the occurring frequency can be reached 37. 9%, 37. 0%, 27.4%, respectively; occurring frequency of the extreme drought in Chuxiong station is higher than the other three sta- tions in four seasons.

关 键 词：帕默尔干旱指数 干旱频率 干旱评价 云南地区 

分 类 号：P468[天文地球—大气科学及气象学]