李家峡水库对尖扎地区气象要素变化的影响研究

Research on the Influence of Lijiaxia Reservoir on the Change of Meteorological Elements in Jianzha Area

利用尖扎、贵德国家站点1981—2010年逐日平均温度、最高温度、最低温度、降水量和相对湿度的观测资料,分析对比两个站点各气象要素的年际变化和蓄水前后的异同,同时分析尖扎地区各气象要素蓄水前后的季节性变化。结果表明:李家峡水库蓄水后尖扎地区年平均温度、年平均最高温度和年平均最低温度都呈增高趋势,年降水量呈增加趋势。蓄水后,春夏秋冬四季的年平均温度、年平均最高温度、年平均最低温度均呈增高趋势,夏季增温变化幅度最小。蓄水后,降水量在春夏秋冬四季均呈增加趋势,其中夏秋两季的增加幅度较为明显。研究表明,李家峡水库的修建对尖扎地区局地气象要素变化有一定的影响。

Using the observation data of daily average temperature,maximum temperature,minimum temperature,precipitation and relative humidity at Jianzha and Guide national sites from 1981 to 2010,analyze and compare the interannual changes of the meteorological elements at the two sites and before and after water storage.Similarities and differences,while analyzing the seasonal changes of various meteorological elements in Jianzha area before and after water storage.The results show that after the impoundment of the Lijiaxia Reservoir,the annual average temperature,the annual average maximum temperature and the annual average minimum temperature in Jianzha area all showed an increasing trend,and the annual precipitation showed an increasing trend.After water storage,the annual average temperature,annual average maximum temperature,and annual average minimum temperature in the four seasons of spring,summer,autumn and winter all showed an increasing trend,and the increase in temperature in summer was the smallest.After water storage,precipitation showed an increasing trend in spring,summer,autumn and winter,and the increase in summer and autumn was more obvious.Studies have shown that the construction of Lijiaxia Reservoir still has a certain impact on the changes of local meteorological elements in Jianzha area.