区域复杂地形晴日太阳辐射估算研究

ESTIMATION OF REGIONAL SOLAR RADIATION ON CLEAR DAYS OVER COMPLEX TERRIAN

为改进复杂地形区区域地表接收太阳入射辐射的算法,基于数字高程模型、气象数据与遥感数据,分直接辐射、来自天空的散射辐射及来自周围地形的反射辐射3部分对海河流域2001—2019年区域地表接收的晴日太阳辐射日总量进行估算与分析。经验证,模拟的晴日太阳入射辐射日通量与实测数据吻合度较高,相关系数约为0.9,区域不同地形接收的太阳入射辐射空间差异明显,结果在可接受精度范围内,此估算方法可为山区太阳能的合理利用提供科学基础。

In order to improve the algorithm of solar radiation received by the surface in complex terrain,the daily solar radiation on clear days received by the land surface in the Haihe River Basin from 2001 to 2019 was estimated and analyzed based on digital elevation model,meteorological data and remote sensing data,including direct radiation,scattered radiation from the sky and reflected radiation from the surrounding terrain.The results showed that the correlation coefficient between the simulated daily solar radiation flux and the measured data on clear days was about 0.9,and the spatial differences of solar radiation received by different terrains were obvious.The results were within the acceptable accuracy range.This estimation method can provide a scientific basis for the rational use of solar energy in mountainous areas.