摘要
基于典型干旱指标的基本概念和构建方法,结合辽西北地区的历史干旱资料,对现有旱情等级标准中不同干旱指标的等级界值进行了修订,建立了辽西北地区气象、水文、农业及社会经济4大类干旱、9个典型代表指标的旱情等级标准,增加了旱涝指数Z、径流距平百分比和水库蓄水距平百分比3个指标,并选择2006年、2007年和2009年3个典型干旱年对旱情等级标准的适合程度进行了验证,评价结果与辽西北地区实际干旱情况吻合率达到85%以上,为辽西北地区准确识别、分析、评价旱情提供了技术支撑。
This paper analyzed and modified the commonly used drought index, from which we developed new standard for clarifying drought severity in northwestern Liaoning province based on available meteorological, hy- drological, agriculture and social economical data. Four categories of droughts and nine typical representative drought indexes were used in the standard; we also introduced flood index z, percentage of runoff anomaly and percentage of reservoir storage anomaly. Suitability of the method was verified against the data measured in 2000, 2006 and 2007, three typical drought years. The calculated results were consistent with the actual situation in the northwest Liaoning Province. The results showed that the agreement was over 85%. The proposed standard provided a guidance for accurately identifying, analyzing and evaluating droughts.
出处
《灌溉排水学报》
CSCD
北大核心
2017年第8期115-120,共6页
Journal of Irrigation and Drainage
基金
辽宁省农业科技创新团队项目(2014212003)
关键词
旱情等级标准
干旱指标
旱情分析
旱情评价
辽西北地区
standard drought severity
drought index
drought analysis
drought assessment
Northwestern Liaoning
