半干旱区植被风沙动力过程耦合研究:Ⅰ.模型

摘要/Abstract

摘要：

从植被生长和风沙活动之间的相互作用机制出发，建立了植被-风沙动力耦合模型。模型包括生物量动力学方程和风蚀量动力学方程。生物量动力学方程主要考虑了植被生产潜力在植被覆盖地表和非植被覆盖地表上的转化、生物量自身消耗以及风蚀量对生物量的影响；风蚀量动力学方程主要考虑风蚀潜力在流沙地表和非流沙地表上的转化以及生物量对风蚀量的影响。根据我国北方半干旱地区相关研究成果对模型中的参数取值进行了探讨，以便进行模拟和应用研究。

关键词: 半干旱区, 植被覆盖, 风沙活动, 动力耦合模型

Abstract:

Vegetation cover variation and wind-sand movement are two main and interactional surface processes in semiarid region. A coupling model of vegetation and sand-blown dynamics was set up. This model consists of two equations: dynamical biomass equation and dynamical wind erosion equation. Dynamical biomass equation mainly considers the conversion of potential productivity of vegetation on the surface with vegetation cover and non-vegetation cover, the self consumption biomass and the influence of wind erosion. Dynamical wind erosion equation mainly considers the potential wind erosion on drifting sand and non-drifting sand, and the influence of biomass. The parameters of the model are calibrated.

Key words: semiarid region, vegetation coverage, aeolian activity, dynamical coupling model

中图分类号:

S157.1

李振山;王怡;贺丽敏. 半干旱区植被风沙动力过程耦合研究:Ⅰ.模型[J]. 中国沙漠, 2009, 29(1): 23-30.

LI Zhen-shan;WANG Yi;HE Li-min. Vegetation-Erosion Process in Semiarid Region: Ⅰ. Dynamical Models[J]. JOURNAL OF DESERT RESEARCH, 2009, 29(1): 23-30.

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