中国荒漠化评价的现状、问题及其解决途径

 荒漠化是一个全球性的环境问题,对其现状和趋势进行准确的评价,将有助于采取更为有效的措施加以防治。作为受荒漠化影响最为严重的国家之一,中国荒漠化局部好转总体扩展的趋势尚未得到遏制。在气候变化和人口增长的双重压力下,西部大开发战略将使中国脆弱的旱地生态系统面临前所未有的挑战,荒漠化评价将为这一战略的顺利实施提供科学的依据。从国家和地区尺度上,回顾了中国荒漠化评价的现状,指出目前中国荒漠化评价存在的主要问题是评价基准的不确定性、评价指标体系的难操作性和遥感数据源选用的随机性,进而对上述问题的解决途径进行了讨论。

Desertification Assessment in China:The State-of-Art, Problems and Solution Measures

Desertification is a globally environmental problem, the accurate assessment to its status, change and trend will be instrumental in global action against it. As one of the most serious desertified-affected countries, the trend of improvement in part and worseness in the whole in China is still continuous. Grand West Development is challenging the fragile dryland ecosystem in the circumstance of heavy population press and projected global change, desertification assessment in China will be guarantee for successful decision-making and implementation of this strategy. This paper overviews the state-of-art of desertification assessment at national and local scales, and puts forward several existing problems including uncertainty of assessment baseline, unavailability of indicator system and randomicity of data sources selection, and correspondently scientific and applicable based solutions are discussed.