荒漠化监测与评价指标研究进展

Desertification detection and the evaluation indicators: A review

适宜的指标体系是高效开展荒漠化监测与评价工作的关键。文中从地面调查和遥感监测两个方面综述了荒漠化监测与评价的指标体系。地面调查的指标体系一般从三个层次上构建:以单一植被盖度指示荒漠化,综合植被、气候、土壤、土地类型等监测荒漠化状态,基于"压力-状态-响应"理论框架系统构建荒漠化监测与评价体系。遥感监测与评价指标主要包括多期影像分类指标、植被参数和土壤参数三个方面。最后总结当前研究中存在的问题,并提出了"多类型-多尺度-多维度"的荒漠化监测与评价指标框架,可为遥感与地面相结合的多类型和多尺度荒漠化过程监测与评价提供科学参考。

Suitable indicator system is the key to efficiently and accurately monitor and evaluate desertification.The desertification monitoring and evaluating indicators for field survey and remote sensing were reviewed. The indicators used in field survey were generally constructed in three levels. They were the single indicator of vegetation cover,the multiply indicators including vegetation,climate,soil,land cover,and the indicator system based on the pressure-state-response framework. The indicators for remote sensing monitoring and evaluating mainly consisted of classification from multi-phase remote sensing images,vegetation detection and soil parameters detection. Finally,we summarized the issues and proposed an indicator framework from multi-type,multi-scale and multi-dimension perspective. The framework could provide scientific reference for desertification monitoring and evaluation using both remote sensing and field survey.