1) scale and technology of assessment
荒漠化评价尺度
2) Desertification assessment
荒漠化评价
1.
Analysis on development of desertification assessment indicator system;
荒漠化评价指标体系研究现状述评
2.
Remote sensing,characterized by more information,larger cover area and shorter period,has high priority to largescale desertification assessment,by which the simplest,most direct and available indicator is vegetation cover,the methods used for vegetation cover acquisition in dryland consist mostly of vegetation index calculation and spectral mixture analysis.
遥感技术以其信息量大、覆盖区域广和短周期等诸多特点正日趋成为大尺度荒漠化评价的主要手段,而最简单、最直接且最易于获取的评价指标是植被覆盖,目前用于获取干旱区植被覆盖的方法主要是计算植被指数(VI)和波谱混合分析(SMA)。
3) desertification evaluation
荒漠化评价
1.
Remote sensing information is widely used in the study of desertification evaluation on account of its merits in its cyclical,macro and systematic aspects.
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。
4) types of desertification and assessment
荒漠化评价类型
5) Desertification evaluation indicator system
荒漠化评价指标体系
补充资料：半荒漠草原(温性荒漠草原)
半荒漠草原(温性荒漠草原)
半荒漠草原(温性荒漠草原) 张自和摄
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条