龙滩水库贵州库区局地气候变化分析

利用龙滩水库贵州库区及其周边10个气象站1961～2010年气象资料,采用线性倾向估计方法对贵州库区的年平均气温、降水量、日照时数、相对湿度做变化趋势分析,采用秩和检验方法对各要素比值的平均值进行水库蓄水前后差异性分析。结果表明：贵州库区年平均降水量和日照时数较常年偏多,其变化趋势主要是大尺度大气环流影响造成的,水库影响不明显;水库蓄水后,使近库区年平均气温降低,年平均相对湿度增大,水库对年平均气温产生影响的最大距离在14～17 km,而对年平均相对湿度产生影响的最大距离〈14 km。

ANALYSIS THE ISOLATED OF CLIMATE CHANGE IN THE LONGTAN RESERVOIR OF GUIZHOU

Use of meteorological data of the reservoir of longtan reservoir in Guizhou and surrounding 10 meteorological stations from 1961 to 2010, the change tendency of annual average temperature, eamount of precipitati- on, insolation duration and relative humidity were analysed for reservoir area in Guizhou to the linear tend to esti- mate method, the average of element ratio were subjected to rank-sum test by difference analysis before and after reservoir built. The results show that： the average of rainfall precipitation and sunshine duration were more than average year in the reservoir area of Guizhou, its main of change tendency resulted from an influence of the large- scale atmospheric circulation without reservoir. After retaining water in the reservoir area, it makes annual average temperature decrease and the annual average of relative humidity is increased near the reservoir area, the reservoir area is in the maximum distance to annual average temperature Influences between 14 to 17 kin, it also is in the maximum distance to annual average of relative humidity Influences less than 14 km.