【摘要】 土地荒漠化是西北内陆河流域主要生态环境问题。通过对荒漠化问题及其成因研究的成果分析,认为土地荒漠化是地域内由植被、地质地貌、水文水资源、气象气候和土壤五大因子组成的自然因素和人类活动综合作用的结果。自然因素中不仅每个因子都是具有自身变化规律的相对独立的个体,因子间也具有复杂的反馈关系。人类活动通过改变自然因素而对荒漠化产生作用。不同的自然因素,人类活动方式不同。由此构建土地荒漠化模型。这一模型具有概念明晰、易于确定人类因素和自然因素对荒漠化的影响程度及易于实现等特点。进一步给出了可实现的量化模型。更多还原

【Abstract】 Land desertification is the main ecological problem of northwest inland basin. Through the analysis on the research results made for the problem and causes of land desertification, the causes were thought as the comprehensive operative results of physical factors (vegetation, geology & geomorphology, hydrology & water resource, soil, climate & meteorology) and human factors in this area. Each of physical factors is not only relatively independent unit with its own law, but also has complex feedback correlation with each other. The human activities act on land desertification through changing natural environment. The patterns of human activities change with different physical systems. Thus, the conceptual model of land desertification is built. This model is noted for its perspicuity concept, easy to determine the influence degree of physical and human factors on land desertification and easy to be achieved. Moreover, the realizable quantificational models are discussed.更多还原