基于遥感数据的水库局地气温调节功能分析——以龙滩水库为例

Analysis of local temperature regulation function of reservoir based on remote sensing data——Take Longtan reservoir as an example

利用研究区1982—2016地面观测站逐年气象数据,采用Mann-Kendall方法确定近库区气温的突变位置;获取2000—2010年1 km栅格月平均气温数据集,通过ArcGis建立缓冲区,得到不同缓冲区的气温栅格数据,再做水库建成前后的时间温差对比;对龙滩水库蓄水前后的气温做时间上的对比,结合地面观测站逐月气象数据进一步验证,对库区温度进行空间上的分析。结果表明,蓄水后由于水域面扩增使库区的气温发生了变化,表现为冬季增温,夏季降温。冬季对水库周边有显著增温效应,夏季气温总体来说以增温为主,但是水库对近库区的气温起到了明显的调节作用,近库区的气温整体呈降低趋势。

According to the annual meteorological data of the ground observation station in the study area from 1982 to 2016,the abrupt change of temperature near the reservoir area was determined by mann-kendall method.The monthly average temperature data set of 1 km raster from 2000 to 2010 was obtained.Buffer zones were built in Arcgis to obtain temperature data of different buffer zones,and then the timea temperature difference before and after the library was built and was compared.The temperature before and after the storage of the reservoir was compared in time,and the monthly meteorological data of the ground observation station were further verified,and the temperature in the reservoir area was analyzed in space.The results show that the temperature changes in the reservoir area due to water area expansion after storage,which is shown as increasing temperature in winter and decreasing temperature in summer.There is significant warming effect in winter around reservoir.Generally speaking,the temperature is mainly increased in summer,but the reservoir has a significant regulating effect on the temperature near the reservoir area,and the temperature near the reservoir area is decreasing as a whole.