基于遥感的荒漠化评价技术研究进展

土地荒漠化是全球性的严重环境恶化现象, 准确、及时、全面地对荒漠化区域进行评价尤为重要。遥感信息以其周期性、宏观性和系统性方面的优势, 在土地荒漠化评价中得到广泛应用。对荒漠化遥感评价技术做了总结归纳, 主要包括经验性的目视解译、基于植被指标的荒漠化评价技术、基于多指标的综合评价技术以及以景观生态学理论为指导的评价技术。最后对目前荒漠化遥感评价技术中存在的问题及发展前景谈了一些看法。

Advances in Researches on Desertification Evaluation Technology Based on Remote Sensing

Desertification is a serious phenomenon of environmental degradation on a global scale.It is very important to evaluate the situation of desertification accurately,timely and comprehensively in certain regions.Remote sensing information is widely used in the study of desertification evaluation on account of its merits in its cyclical,macro and systematic aspects.This paper has summarized the desertification evaluation technologies with remote sensing,including visual interpretation,the vegetation index-based desertification evaluation techniques,the multi-index-based comprehensive evaluation techniques and the evaluation techniques based on landscape ecology theory.Finally,the paper also has been concerned with the problems and prospects of desertification evaluation technologies with remote sensing.