基于湿润指数的四川盆地农业干旱时空变化特征  

Temporal and Spatial Variations of Agricultural Drought in Sichuan Basin Based on Moisture Index

作　　者：李金建[1,2] 张菡[1,2] 王锐婷[1,2] 张玉芳[1,2] 

机构地区：[1]中国气象局成都高原气象研究所,成都610072 [2]四川省农业气象中心,成都610072

出　　处：《西南大学学报（自然科学版）》2014年第1期129-136,共8页Journal of Southwest University(Natural Science Edition)

基　　金：中国气象局气象关键技术集成与应用项目(编号:CAMGJ2012M43);四川省气象局重点课题(川气课题2013-开发-14;川气课题2012-开发-06)共同资助

摘　　要：采用四川盆地89个气象台站1961-2008年实测气象资料,计算了各站历年各季的湿润指数,并利用湿润指数,分析了四川盆地的农业干旱发生频率、发生范围及发生强度变化特征,并以2006年川渝特大干旱过程为例探讨了湿润指数对四川盆地农业干旱评价的适用性,结果表明:采用湿润指数评价农业干旱是可行的;各季农业干旱中春旱发生最为频繁,夏旱次之,伏旱最少;春旱发生范围最广,伏旱最小;干旱平均强度,以春旱强度最高,夏旱次之,伏旱最弱.Based on the observer meteorological data of 89 meteorological stations from 1961 to 2008 in main agricultural area of Sichuan Basin, moisture indexes were calculated for various seasons of each station and used to analyze the characteristics of the occurrence frequencies, scopes and severities of agricultural drought in the basin. Then, with the severe drought in 2006 in Sichuan and Chongqing as an exampie, the applicability of moisture index in agricultural drought evaluation was discussed. The results confirmed the feasibility of using moisture index in the evaluation of agricultural drought. Spring agricultural drought had the highest frequency, followed by summer drought and late summer drought. The scope of drought was the greatest in spring and the least in late summer. Spring had the highest mean strength of drought, followed by summer and late summer.

关 键 词：四川盆地 农业干旱 湿润指数 

分 类 号：S423[农业科学—植物保护]