| Classification System for Desertification and Its Quantitative Assessment Methodology in China |
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| 引用本文： | WangJunhou ZhangZhiqiang JiaBaoquan MengFanrong. Classification System for Desertification and Its Quantitative Assessment Methodology in China[J]. 中国林学(英文版), 2003, 5(3): 42-48 |
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| 作者姓名： | WangJunhou ZhangZhiqiang JiaBaoquan MengFanrong |
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| 作者单位： | [1]NationalDesertificationMonitoringCenter,StateForestryAdministration,Beijing100714,P.R.China [2]CollegeofSoilandWaterConservation,BeijingForestryUniversity,Beijing100083,P.R.China [3]ChineseAcademyofForestry,Beijing100091,P.R.China |
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| 基金项目： | the National Natural Science Foundation of China (Grant No.30070601 and 399904900) |
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| 摘 要： | Based on the desertification definition of United Nations Convention to Combat Desertification and features of desertification in China, three-level hierarchical classification system for desertification and quantitative assessment methodology of desertification degree were developed and used to evaluate desertification danger degree across the country. The system is composed of three components: type of desettification, type of land utilization and degree of desertification. The type of dertification monitored in China was divided into 4 major categories, 15 sub-categories and 52 types. Vegetation coverage, soil characteristics,and topography are considered as three major indicators for quantitative assessment of desertified land. A simple, yet practically sound mathematical assessment model was built using these indicators. Furthurmore, a regional land desertification warning model was also constructed on the basis of the ratios of non-desertified land area to desertified land area in different degrees. The warning result of wind-erosion desertification at county scale for 12 provinces in northern China was also calculated by this model.
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| 关 键 词： | 中国 土地荒漠化 分类 评价方法 评价指标 |
Classification System for Desertification and Its Quantitative Assessment Methodology in China |
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| Wang Junhou,Zhang Zhiqiang,JIA Baoquan,Meng Fanrong. Classification System for Desertification and Its Quantitative Assessment Methodology in China[J]. Forestry Studies in China, 2003, 5(3): 42-48 |
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| Authors: | Wang Junhou Zhang Zhiqiang JIA Baoquan Meng Fanrong |
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| Abstract: | Based on the desertification definition of United Nations Convention to Combat Desertification and features of desertification in China, three-level hierarchical classification system for desertification and quantitative assessment methodology of desertification degree were developed and used to evaluate desertification danger degree across the country. The system is composed of three components: type of desertification, type of land utilization and degree of desertification. The type of desertification monitored in China was divided into 4 major categories, 15 sub-categories and 52 types. Vegetation coverage, soil characteristics, and topography are considered as three major indicators for quantitative assessment of desertified land. A simple, yet practically sound mathematical assessment model was built using these indicators. Furthurmore, a regional land desertification warning model was also constructed on the basis of the ratios of non-desertified land area to desertified land area in different degrees. The warning result of wind-erosion desertification at county scale for 12 provinces in northern China was also calculated by this model. |
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| Keywords: | desertification indicator desertification classification quantitative assessment |
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