起伏地形下黄河流域太阳直接辐射分布式模拟

doi:10.11821/xb200504017

Abstract

Abstract:

Due to the influences of local topographical factors and terrain inter-shielding, calculation of DSR quantity over rugged terrains is very complex. Based on DEM (digital elevation model) data and meteorological observations, a distributed model for calculating direct solar radiation over rugged terrains is developed. This model gives an all-sided consideration on factors influencing DSR. Using the selected model, normals of annual DSR quantity with a resolution of 1 km×1 km for the Yellow River Basin was generated, with DEM data as the general characterization of the terrains. Characteristics of DSR quantity influenced by geographic and topographic factors over rugged terrains were analyzed thoroughly. The results suggest that influenced by local topographic factors, i.e. azimuth, slope and so on, the annual DSR quantity over mountainous area has a clear spatial difference; and the annual DSR quantity of sunny slope (or southern slope) of mountains is obviously larger than that of shady slope (or northern slope). The calculated DSR quantity of the Yellow River Basin is provided in the same way as other kinds of spatial information and can be employed as basic geographic data for relevant studies as well.

Key words: Yellow River Basin, direct solar radiation, rugged terrain, digital elevation model, distributed model

ZENG Yan, QIU Xinfa, LIU Changming, JIANG Aijun. Distributed Modelling of Direct Solar Radiation of Rugged Terrain over the Yellow River Basin[J].Acta Geographica Sinica, 2005, 60(4): 680-688.

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Distributed Modelling of Direct Solar Radiation of Rugged Terrain over the Yellow River Basin

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