| 榆林地区土地沙漠化过程中人文作用的定量分析 |
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| 引用本文： | 樊胜岳,杨根生,艾南山.榆林地区土地沙漠化过程中人文作用的定量分析[J].干旱区资源与环境,1989(1). |
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| 作者姓名： | 樊胜岳 杨根生 艾南山 |
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| 作者单位： | 中国科学院兰州沙漠研究所
(樊胜岳，杨根生)，兰州大学(艾南山) |
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| 摘 要： | 本文通过对榆林风沙区沙漠化成因的分析,建立了一个沙漠化过程的数学模型:Y=At·f(P,W),利用数学变换,得出人为作用的变化速度方程:a=y-αp-βw,并且提出了降水,风速弹性的概念和计算方法。通过计算,榆林地区土地沙漠化过程中人为因素的作用为112.3%。沙漠化过程的数学模型的建立和人为作用的定量分离,为预测沙漠化发展,控制人为作用强度,制定沙漠化治理措施,提供了理论依据。
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The quantitative analysis of anthropological effects in the process of desertification in Yulin Region,Shaanxi Province |
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| Abstract: | In this Paper, a mathematical model of the Process of desertification is
put forward by analysing the causation of desertification;Y=At P (P,W)
andbymathemaaticalchanging,an equation of the changing velocity of anthro-
pological effects is given: a=y--?P--βw. The concept and calculating Pro-
gramme of the Spring of winds and rains are raised.
By calculating, the anthropological effects is 112.3% in the Process of
desertification in Yulin.ItProvides scientific basis for calculating the develop
ment of desertification and controlling anthropological action and harnessing
desertification that the mathematical model is put forward. |
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