沧州市近50年降水量变化趋势分析

ang Zhou City is in warm temperate zone continental monsoon climate area , the amount of precipitation long range changes acutely. Thesis 6 amount of precipitation most long (arrive at 85 in 72) according to Cang Zhou City observes age observatory, the close to Cang Zhou City amount of precipitation change in 50 trend analyses, result indicates 1984-2004 annual Cang Zhou City being in the precipitation dry season , 1956-1984 is in abundant water scheduled time , 1984 is that abundant dried up conversion key is annual. In 2005 hereafter, precipitation has the trend increasing by step by step. Be close to 50 than 1956 cuts down 22.4 mms to average amount of precipitation in 1984 many years. Suggest that diligent and thrifty , keeps expenditures within the limits of income , protect water resource measure according to history experience.