三种气象干旱等级评价方法的比较与改进  

Three Kind of Meteorological Drought Classification Method Comparison and Improvement

作　　者：李龙 徐玲玲 方军 

机构地区：[1]宣城市气象局,安徽宣城242000 [2]泾县气象局,泾县242500 [3]宁国市气象局,宁国242300

出　　处：《中国农业气象》2009年第S2期310-312,共3页Chinese Journal of Agrometeorology

基　　金：中国气象局新技术推广项目(CMATG2005M34)

摘　　要：在对本地干旱进行气象干旱等级评价比较后发现,用土壤墒情法会出现对实际干旱次数的少估和程度的轻估,用降水距平百分率法会出现多估和重估,用连续无雨日数法会出现多估和轻估。因此,本文提出了改进方法:用土壤墒情法和降水距平百分率法得出的干旱等级进行回归、综合,可得出接近实际的本地化干旱等级评价方法。In this paper,it was shown that it would be underestimate the actual drought situation with the soil moisture method;and more and serious with the precipitation anomalous percentage,more and slight with the continuous clear day number might be obtained according to the service stipulated when we assessed the local drought situation.The author proposed one kind of improvement method in the regression synthesis equation with the classification of soil moisture and the precipitation anomalous percentage.It was close the actual drought situation.

关 键 词：气象 干旱 评价 

分 类 号：S423[农业科学—植物保护]