Simulation of solar radiation on ground surfaces based on 1 km grid-cells
Simulation of solar radiation on ground surfaces based on 1 km grid-cells
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发表时间：
2005
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通讯作者：
Zhu Lifen;Tian Yongzhong;Yue Tianxiang;Fan Zemeng;Ma Shengnan;Wan Ying-an
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作者：
Zhu Lifen;Tian Yongzhong;Yue Tianxiang;Fan Zemeng;Ma Shengnan;Wan Ying-an
建立了中国1km网格单元水平面太阳辐射的多元非线性回归模型。验证结果表明，预测精度为96.63%。基于数字高程模型（DEM），分别计算坡平直接辐射比和坡面天空景观因子，对直接辐射和散射辐射进行修正，得到1km地表的实际太阳辐射。结果表明，丘陵山区坡面与水平面的太阳辐射差异较大，我国最大差异可达67%。模拟辐射可广泛应用于农业生产潜力评价、农业区划、农作物布局、退耕还林还草等农业实践和研究领域。
Multivariate nonlinear regression model was established to simulate the solar radiation on level surface of 1 km grid-cells in China. The validation shows the prediction accuracy is 96.63 percent. Based on digital elevation model (DEM), the direct radiation ratios of slope to level and the sky view factors of slope were calculated respectively to modify direct and diffuse solar radiation which aimed to get the actual solar radiation on 1 km ground surfaces. The results indicated that great difference of solar radiation between slope and level surfaces existed in hill and mountainous regions, and the maximum difference might reach 67 percent in China. The simulated radiation could be used in extensive fields of agricultural practices and researches, such as assessment of agricultural potential productivity, agricultural zoning, distribution of crops, and returning farmland into forest and grassland.