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利用河南省1951～1998年旱涝灾害影响资料，划分了旱涝灾害年型，并分析了ENSO事件与河南旱涝年型的关系：在厄尔尼诺当年、次年及反厄尔尼诺年，干旱年成灾面积大于67万公顷的大旱年占旱年总数的61％，涝年成灾面积大于67万公顷的大涝年占涝年总数的65％；厄尔尼诺年旱年频率大于涝年频率，反厄尔尼诺年旱、涝年频率相当；弱、最弱及最强的厄尔尼诺开始年涝灾影响为主，中等及偏强厄尔尼诺开始年以旱灾为主；厄尔尼诺开始年与次年旱涝影响趋势相一致的频率达92％。
Based on the data of drought and flood disasters in Henan Province from 1951 to 1998, the annual types of drought and flood disasters are divided and the relationship between ENSO events and drought and flood years of Henan is analyzed. In El Niño, the next year, and the anti-El Niño years and the drought years The area covered more than 670,000 hectares, accounting for 61% of the total number of dry years, and the flood years causing more than 670,000 hectares of flood years accounted for 65% of the total number of flood years. El Niño annual dry season frequency is greater than that of flood years, Drought and flooding year; El Niño, the weakest, weakest and the strongest, started the year with floods, middle and strong El Niño started the year with droughts; El Niño started the year with the frequency of the following year’s droughts and floods Up to 92%.