Spatial distribution feature of insolation duration over rugged terrains in the Guizhou Plateau

Shujie Yuan; Xiaoping Gu; Qilong Miao; Xinfa Qiu

doi:10.1117/12.746028

14 November 2007 Spatial distribution feature of insolation duration over rugged terrains in the Guizhou Plateau

Shujie Yuan, Xiaoping Gu, Qilong Miao, Xinfa Qiu

Proceedings Volume 6790, MIPPR 2007: Remote Sensing and GIS Data Processing and Applications; and Innovative Multispectral Technology and Applications; 67900N (2007) https://doi.org/10.1117/12.746028
Event: International Symposium on Multispectral Image Processing and Pattern Recognition, 2007, Wuhan, China

Abstract

Due to local terrain factors such as slope, aspect and terrain inter-shielding, the insolation duration (ID) over rugged terrain (RT) is different from over horizontal surface. Based on digital elevation model (DEM), the distributed models to Guizhou Plateau with 100m×100m DEM data for calculating ID over RT are developed. The results are that the influences of slope, aspect and the terrain inter-shielding on ID are very big. The spatial distribution of ID has apparent terrain feature over RT. The solar altitude angle is quite low in January, which causes more inter-shielding by the RT, and the spatial difference of ID is big. The solar altitude angle is quite high in July; which causes less inter-shielding by the RT, and the spatial difference of ID is corresponding small. But the ID over horizontal surface is much in July, and the influence of local terrain on the ID is still obvious. The ID varies spatially 16~142 and 133~210 hours, and the maximum one is about 9 and 1.6 times bigger than the minimum one in January and July, respectively. The annual ID varies spatially 768~1824 hours, and its local difference is very obvious.

Citation Download Citation

Shujie Yuan, Xiaoping Gu, Qilong Miao, and Xinfa Qiu "Spatial distribution feature of insolation duration over rugged terrains in the Guizhou Plateau", Proc. SPIE 6790, MIPPR 2007: Remote Sensing and GIS Data Processing and Applications; and Innovative Multispectral Technology and Applications, 67900N (14 November 2007); https://doi.org/10.1117/12.746028

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