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利用1961～2008年湖北省双季稻区常规气象站资料,统计计算了双季稻产区在早晚稻生长季的降水量、暴雨量、暴雨日数以及洪涝发生次数,揭示了近50a来双季稻区降水及洪涝的变化特征。结果显示:湖北省双季稻区在早晚稻生长季的降水量都有弱的增加趋势,尤其是鄂东北局部和江汉平原南部;在水稻抽穗扬花至成熟期间,早稻暴雨量大部有不显著的增加趋势,而晚稻则大部为弱减少趋势。早稻生长季内洪涝的发生次数总体呈增加趋势,局部地区严重洪涝发生次数加大;晚稻生长季洪涝总次数有略减少趋势,重度以上洪涝发生很少,但呈略增加趋势。
Based on the data of conventional weather stations in double cropping rice fields in Hubei Province from 1961 to 2008, the precipitation, the heavy rainfall, the number of rainstorms and the number of floods in the growing season of double cropping rice were calculated. Variation Features of Precipitation and Flood in Rice Area. The results showed that the precipitation in early and late rice growing season in Hubei double cropping rice area had a weak increasing trend, especially in northeastern Hubei Province and southern Jianghan Plain. During the flowering and maturity of rice, most of the rainfall in early rice was insignificant Of the increase trend, while the late rice is mostly weak reduction trend. The incidence of floods in the early rice growing season showed an overall trend of increase, and the number of serious floods in some areas increased. In the late rice growing season, the total number of floods decreased slightly while the floods above the severe ones rarely occurred but increased slightly.