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1 新郑市的干旱灾害和特点新郑市常年降水量683mm,降雨量年际、年内分布不均,汛期降雨量占全年降水量的65%左右,旱涝灾害频繁,特别是干旱灾害极为严重,1951年到2001年51年内,全市出现较大干旱35次,其中重灾15次。最严重的旱灾发生在今年上半年,2月23日至6月17日,全市115天降雨量为20mm,比常年减少8～9成,为有气象记录以来最严重的旱情,干旱导致全市夏、秋两季作物生产受到影响,春旱期间全市农作物受旱面积达2.69万hm~2,初夏旱最严重时受旱面积达3.17万hm~2,其中
1 DROUGHT DISCOUNT AND CHARACTERISTICS IN XINZENG CITY The annual precipitation in Xinzheng City is 683mm. There is an uneven distribution of rainfall during the year and during the year. Rainfall in the flood season accounts for about 65% of the annual precipitation. Floods and droughts are frequent, especially in the severe drought. During the 51 years from 1951 to 2001, there were 35 major droughts in the city, including 15 major ones. The worst drought occurred in the first half of this year, February 23 to June 17, the city’s 115-day rainfall of 20mm, a decrease of 8 to 9% over the previous year, the worst drought ever recorded by meteorological records, leading to drought in the whole city The crop production in the autumn and autumn was affected. During the drought period, the drought-affected area of the whole city reached 26,900 hm ~ 2. In the most severe drought in early summer, the drought-affected area reached 31,700 hm ~ 2, of which