植被与风蚀耦合动力学模型及其应用

摘要/Abstract

摘要： 利用植被-风蚀耦合动力学研究了植被生长发育与风蚀发生、发展之间的动力学关系,考虑了植被覆盖度V和风蚀比S之间的相互耦合作用,以及在外力作用尤其是人类活动影响下的植被与风蚀的演变规律,以此建立了植被-风蚀动力学模型。将模型应用于京津风沙源治理工程区等区域,采用试算法探索了模型中参数的取值,模拟了区域植被盖度与风蚀比发展演变过程,发现模拟结果与实际演变过程符合精度较高,进而分析并利用模型进行预测,结果表明,植树造林等增加植被的措施对风蚀发展的控制作用比较缓慢,是一个长期作用效果,需要坚持不懈的努力才可能达到预期的治理效果。

关键词: 植被覆盖度, 风蚀比, 动力学模型

Abstract: The coupling dynamics between vegetation and aeolian erosion is applied to study the relationship between vegetation growth and aeolian erosion development. Taken into consideration of the mutual coupling effect between vegetation coverage and aeolian erosion ratio, and the external force especially the influence of human activities, a dynamics model is set up in this study. Applied in the Beijing and Tianjin sand source control project areas, the model's theoretical solutions are calculated to simulate the development process of vegetation coverage and aeolian erosion ratio, and the parameters in model are gotten through a test calculation. The calculated values agreed well with the actual values. Finally, the model is applied to predict the development process of vegetation coverage and aeolian erosion ratio. The results show that afforestation and other measures to increase vegetation are effective to control Aeolian erosion development although the effect is relatively slow and a long-term effect need persistent efforts.

Key words: vegetation coverage, aeolian erosion ratio, dynamics model

中图分类号:

S157

马艳萍;黄宁*. 植被与风蚀耦合动力学模型及其应用[J]. 中国沙漠, 2011, 31(3): 665-671.

MA Yan-ping;HUANG Ning. Coupling Dynamic Model of Vegetation and Aeolian Erosion and Its Application[J]. JOURNAL OF DESERT RESEARCH, 2011, 31(3): 665-671.

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