晋中近49年气候变化特征及对水资源的影响

Climatic Change and Its Impact on Water Resources in Jinzhong,Shanxi Province for Recent 49 Years

利用晋中市近49年的气候和水资源等资料,对气温、降水的变化特征以及由此引起的水资源量的变化进行了统计分析。结果表明:年平均气温整体呈上升趋势,平均以0.3℃/10年速率上升,气温偏高主要是冬季,夏季变化幅度不大。降水量的变化呈减少趋势,以35.9mm/10年的速度在递减,1990年代是降水量减少幅度最大的时期;水资源总量、地下水、河川径流量呈减少趋势,与降水的变化具有明显的一致性。

Based on the climate and water resources data of Jingzhong , Shanxi Province for recent 49 years, the change characteristics of temperature, precipitation and water resources are analyzed. The results indicate that the annual mean temperature is rising at a rate of 0.3 ℃/10a, and the increasing mainly occurs in winter. While, the precipitation is decreasing at a rate of 35. 9mm/10a, with the largest decrease in the 1990s. The water resources, groundwater and river runoff all tend to decrease, which are consistent with the changes of precipitation.