1961—2010年汤阴气象干旱发生等级及频率研究

Grade and Frequency of Meteorological Drought in Tangyin from 1961 to 2010

利用中华人民共和国国家标准——《气象干旱等级》(GB/T20481-2006)的要求、方法及计算标准,分析汤阴县1961—2010年季、年气象干旱发生的等级及频率。结果得出,汤阴县在1961—2010年中,出现轻旱以上的旱情年份有13年,其中出现重旱、特旱的年份各有2年;一年四季中,冬、春、秋季都出现过特旱天气,其中冬季出现9次,春季出现1次,秋季出现3次,夏季未出现。说明汤阴县出现秋、冬连旱的概率较大,应注意抗旱保墒;夏季出现特旱的概率较小,应注意防洪防涝。

According to requirements, methods and calculation standards of Grade of Meteorological Drought （GB/T 20481-2006）, grade and frequency of meteorological drought season and year appeared in Tangyin County, Henan Province from 1961 to 2010 were analyzed. The results showed that the county experienced slight drought and above in 13 years during the study period, se- vere drought and extremely-severe drought appeared in 2 years each. Extremely drought appeared in winter, spring and autumn, specifically, 9 times in winter, 1 in spring and 3 in autumn, but none in summer. It implies that continuous drought in autumn and winter is likely to appear in Tangyin County, thus special attention should be given to fight against drought and preserve moisture in the soil; and extremely severe drought is unlikely to appear in summer, but more attention should be given to prevent flood and water logging.