摘要
在考虑荒漠化评价的空间尺度和基准以及潜在评价指标的尺度特征的基础上,以国内外对土地荒漠化过程中植被降水利用效率(RUE)变化的研究为依据,提出一种以植被的降水利用效率为主要评价指标、适合于荒漠化遥感监测应用的荒漠化评价方法。该方法可很大程度上克服以植被指标为主的评价方法受降水波动影响大的缺点。这种方法重视不同荒漠化类型的共性特征,适合在多种类型荒漠化遥感评价中应用。
A new approach suited to desertification by remote sensing monitoring for desertification assessment taking Rain Use Efficiency (RUE) of the vegetation as a key indicator is presented according to the results of many researches about change of RUE in desertification process, considering much of spatial scale and criterion of desertification assessment and the scaling characteristics of different potential indicators for desertification assessment. This kind of method can get over the shortcomings that the approaches taking the vegetation characters as main indicators are greatly influenced by the variation of annual rainfall. This new approach emphasizes the common characteristics of different types of desertification, so it can be applied in assessments of many types of desertification by remote sensing.
出处
《中国水土保持科学》
CSCD
2005年第2期37-41,共5页
Science of Soil and Water Conservation
基金
国家"十五"科技攻关项目"典型区风沙危害动态监测及其遥感信息提取"(2002BA517A096)
