Comparison of different algorithms for calculating the shading effects of topography on solar irradiance in a mountainous area
文献类型：期刊论文
| 作者 | Zhang, Yanlin1; Chang, Xiaoli1,2; Liang, Ji1 |
| 刊名 | ENVIRONMENTAL EARTH SCIENCES
 |
| 出版日期 | 2017-04-01 |
| 卷号 | 76期号:7页码:16 |
| 关键词 | Topographic shading effect Sky view factor Solar irradiance Terrain Solar insolation duration |
| ISSN号 | 1866-6280 |
| DOI | 10.1007/s12665-017-6618-5 |
| 通讯作者 | Zhang, Yanlin(zhangyanl02@163.com) |
| 英文摘要 | In mountainous areas, topographic shading effects exert significant influence on the spatial distribution of solar irradiance on the land surface, which should be considered in estimating and modeling physical, biological, and hydrological processes. Various algorithms have been proposed for quantitative assessment of the impact of topography on the arriving solar radiation on slopes in mountainous area based on digital elevation model (DEM). However, different algorithms tend to produce different results even based on the same DEM. In this study, two algorithms for determining the maximum horizontal viewing angle of terrain obstruction were compared in a catchment in the Qilian Mountains, Northwest China, which were identical except for the way in interpreting DEM. Two algorithms for calculating sky view factor were also compared. Then, different algorithm combinations were compared and their sensitivities to the horizontal resolution of DEM were investigated. Results showed that the differences in outputs of different algorithms and combinations were significant and cannot be ignored in estimating the spatial distribution of solar irradiance in mountainous areas. A simple ground validation concluded that the algorithm assuming a linear variation in elevation was a little better than that assuming a stepped variation in elevation in and among neighboring DEM cells. For calculating diffuse solar radiation, the algorithm based on a sloped coordinate system was theoretically better than that based on a horizontal coordinate system. It is worth noting that even though the estimated annual mean of solar irradiance over the study area was almost the same among some algorithm combinations, the difference in spatial distribution was significant, which may lead to consequent difference in assessing or modeling some other environmental variables relevant to surface energy exchange, e.g., evaporation, snowmelt, and ground temperature. However, the analysis in this study was mainly theoretical, and further ground-based validations should be made in future. |
| 收录类别 | SCI |
| WOS关键词 | SKY-VIEW FACTOR ; RADIATION MODEL ; RIVER-BASIN ; COMPLEX TOPOGRAPHY ; GLOBAL RADIATION ; MT. QOMOLANGMA ; TERRAIN ; BALANCE ; ENERGY ; PARAMETERS |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Water Resources |
| WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000399674700032 |
| 出版者 | SPRINGER |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2557705 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Zhang, Yanlin |
| 作者单位 | 1.Hunan Univ Sci & Technol, Natl Local Joint Engn Lab Geospatial Informat Tec, 02 Taoyuan Rd, Xiangtan 411201, Hunan, Peoples R China 2.Chinese Acad Sci, State Key Lab Frozen Soils Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yanlin,Chang, Xiaoli,Liang, Ji. Comparison of different algorithms for calculating the shading effects of topography on solar irradiance in a mountainous area[J]. ENVIRONMENTAL EARTH SCIENCES,2017,76(7):16. |
| APA | Zhang, Yanlin,Chang, Xiaoli,&Liang, Ji.(2017).Comparison of different algorithms for calculating the shading effects of topography on solar irradiance in a mountainous area.ENVIRONMENTAL EARTH SCIENCES,76(7),16. |
| MLA | Zhang, Yanlin,et al."Comparison of different algorithms for calculating the shading effects of topography on solar irradiance in a mountainous area".ENVIRONMENTAL EARTH SCIENCES 76.7(2017):16. |
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来源：寒区旱区环境与工程研究所
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