河西走廊东部人工降水试验效果评估

采用非随机试验，运用序列试验法、区域对比试验法、区域回归试验法，分析了在河西走廊东部凉州区1997～2004年夏秋季进行的高炮、火箭人工增雨作业和2002～2004年冬春季进行的焰弹人工增雪作业。试验发现，1997～2004年夏秋季累计增加降雨量134mm，平均相对增雨率为47％；2002～2004年冬春季累计增加降雪量12．5mm，平均相对增雪率为40％。说明河西走廊东部进行的人工增雨（雪）效果是明显的，进行人工增雨（雪）是可行的，并对武威市人工增雨（雪）季节、布点和时机等提出了思考。

Assessment of precipitation stimulation experiment in eastern Hexi Corridor

The impact of precipitation stimulation was analyzed in Liangzhou district of eastern Hexi Corridor during summer and autumn from 1997 to 2004 with anti-aircraft gun and during winter and spring from 2002 to 2004 with pyrotechnic shoot by means of non-random experiment,such as sequential test method,regional comparative experiment and regional regression test method.It was found that the total rainfall increased by 134mm during summer and autumn from 1997 to 2004,and the mean increasing rate of rainfall was 47%;the total snowfall increased by 12.5mm during winter and spring from 2002 to 2004,and the mean increasing rate of snowfall was 40%.The operation of rain(snow) stimulation was quite effective and feasible in eastern Hexi Corridor.The rational seasons,spot distribution and ideal time of precipitation stimulation in Wuwei city were also discussed.