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全球干旱半干旱区域约占陆地总面积的43％,由于干旱半干旱地区生态环境十分脆弱,是全球变化的敏感区。干旱和洪涝等自然灾害频繁,危害严重,水资源日益枯竭,环境质量日趋恶化,尤其是土壤沙漠化、盐碱化等,严重威胁着人类赖依生存的良田和草场,制约着地区经济发展和社会进步。利用空间遥感技术监测和预测干旱半干旱地区自然环境现状及其变化趋势,对区域自然资源进行遥感调查与评估,为各国政府有关部门提供宏观决策依据,是各国遥感工作者面临的迫切任务。为此,经国家科委、全国科协批准,由中
The global arid and semi-arid region accounts for about 43% of the total land area. Due to the fragile ecological environment in arid and semi-arid regions, it is a sensitive area for global change. Natural disasters such as droughts and floods are frequent and endangered, with increasingly depleted water resources and deteriorating environmental quality, especially soil desertification and salinization, which threaten the survival of mankind and pastures and restrict the economic development and social development in the region progress. It is an urgent task for remote sensing workers in all countries to use remote sensing technology to monitor and predict the current situation and the changing trend of natural environment in arid and semi-arid regions. Remote sensing survey and assessment of regional natural resources provide the macro-decision-making basis for relevant government departments of all countries. To this end, approved by the State Science and Technology Commission, the National Association for Science and Technology, by