光伏电场对地表温度的影响分析

Impact Analysis of Solar Park on Land Surface Temperature

以甘肃省金昌市金川区西坡光伏电场为例,利用多景Landsat系列影像,采用辐射传输方程法(radiative transfer equation,RTE),对光伏电场建设前后的地表温度进行了反演,提取电场不同缓冲区范围内的地表温度均值。研究结果表明,光伏电场会对占地范围和不同缓冲区范围内的地表温度产生降温的作用。其占地区域降温幅度为2.12 K,100 m缓冲区降温幅度为0.94 K,随着距离的增加这种影响逐渐减弱,400 m后影响会变得十分微弱,研究结果为客观地评价光伏电场对环境的影响提供借鉴。

Taking Xipo solar park in Jinchuan District of Gansu Province for example, based on multi Landsat images, we used radiative transfer equation(RTE) method to invert the land surface temperature before and after construction of solar park, and extracted the mean value of the land surface temperature in different buffer zones around the solar park. The results show that solar park has a cooling effect on the land surface temperature both in the solar park area and the buffer zones. The average value of land surface temperature in solar park area is 2.12 K cooler than the area that has not been affected, and the average value of land surface temperature in the buffer zone of 100 meters is 0.94 K cooler than the area that has not been affected. With the increasing distance of the buffer zones, the cooling effect will get weaker gradually, and there is no obvious impact on land surface temperature after 400 m. This study can provide a reference for the impact evaluation of the solar park on environment.