关中地区旱涝灾害研究

Research on drought/flood in Guanzhong region

采用关中地区渭南杨刘村、西安肖家村和宝鸡九龙泉3个观测站20世纪50—70年代气温、降水资料和90年代旱涝灾害资料,分析了该地区旱涝灾害的类型、发生规律及其与降水、气温之间的关系.结果表明,春旱、春夏连旱、秋旱、夏涝、夏秋涝是关中地区主要的旱涝灾害类型;旱灾的发生具有10年左右的周期,涝灾的发生具有5年左右的周期;50—70年代关中地区涝灾偏多,气温偏低;冬季偏寒常易出现来年夏旱,冬季偏暖常易出现来年夏涝;90年代的旱灾增多,尤以秋旱为特征.

Based on the observed data of precipitation and temperature during 1950 s-1970 s in Guanzhong region( Baoji, Xi′an and Weinan are taken as examples), to analyze the relation between drought/flood and precipitation amount ?temperature .The results are as follows:in Guanzhong region, drought/flood have certain regularity: the period of drought is about ten years and the period of flood is about five year ;From 1950s to 1970s,there were more floods, and temperature is lower ;in Guanzhong region ,if the temperature of winter was lower ,summer flood wiu happen, on the countrary, if it is higher ,summer drought will happen; there are more droughts in 1990 s, especially more autumn droughts