冀北山地界面层立地评价热量因子相关模型的研究

Correlation models of site evaluation on heat factors in the interface layer of northern mountain areas in Hebei Province.

为提高立地评价定量化水平,于2005和2006年生长季在河北省丰宁定位观测了小坝子乡山顶、阳坡、阴坡的太阳直接辐射强度、空气温度和地温等热量因子.运用回归分析等数学方法,建立了热量因子间的相关模型.结果表明,3个观测点上太阳直接辐射强度与气温均呈二次曲线相关关系,气温与地温呈线性相关关系.实现了因子间的相互推算,为立地评价数量化奠定了基础.

To raise the quantitative level of site evaluation, heat factors in the interface layer, including direct solar radiation, air temperature and soil temperature at hill top, south-facing and north-facing slopes, were observed at Xiaobazi Township of Fengning County in Hebei Province during the growing seasons in 2005 and 2006. Correlation models of these factors were obtained by mathematic regression analysis method on the level of significance. The results showed that under the extremely significant level, at the above three observation sites, the variations of direct solar radiation and air temperature were quadratic form, while the variations of air temperature and soil temperature were linear. All of these establish a base for the quantification of site evaluation and fulfil the calculation between each other among heat factors.