起伏地形中的散射辐射及其计算模式
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A NUMERICAL MODEL FOR CALCULATING DIFFUSE RADIATION OVER RUGGED TERRAIN
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    摘要:

    本文根据对丘陵山区地形参数的数值模拟结果,应用野外试验观测资料,较详细地讨论了起伏山区散射辐射计算模式。主要讨论三个问题:天穹散射各向异性下的坡地散射辐射计算;实际地形遮蔽下的坡地散射辐射计算;由周围山地反射而到达坡面的散射辐射计算。最终分析了散射辐射在大别山南段赵公岭山区的分布特点。结果表明,山区散射辐射场与地形要素场配合较好,其中冬季以坡向影响为主,夏季则以地形遮蔽为最重要。

    Abstract:

    A numberical model is developed, based on a large amount of observations of diffuse radiation taken at various sites in field experiments over rugger terrain. Three main problems are discussed: Computation of diffuse sky radiation toward a tilted plane; effect of protruding topography; and the amount of radiation reflected by the surrounding high ground to the slope in question. Finally, an analysis is made of the distributive characteristics of diffuse radiation over the southern section of the Dabie mountain range, showing good correspondence between the field of diffuse radiation in this rugged area and its topographic field. It is found that a more important role is played by the facing of the slope in winter but by the shading effect in summer.

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  • 收稿日期:1986-03-04
  • 最后修改日期:1986-06-26
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