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| New approach for desertification assessment by remote sensing based upon Rain Use Efficiency of vegetation |
| Gao Zhihai1,2, Li Zengyuan1, Ding Guodong3, Li Linying4 |
1.Institute of Forest Resources Information Techniques, Chinese Academy of Forestry, 100091, Beijing; 2.Gansu Desert Control Research Institute,
733000, Wuwei, Gansu; 3.College of Soil and Water Conservation, Beijing Forestry University, 100083, Beijing; 4.Shanxi Academy of Forestry, 030012, Taiyuan: China |
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Abstract A new approach suited to desertification by remote sensing monitoring for desertification assessment taking Rain Use Efficiency (RUE) of the vegetation as a key indicator is presented according to the results of many researches about change of RUE in desertification process, considering much of spatial scale and criterion of desertification assessment and the scaling characteristics of different potential indicators for desertification assessment. This kind of method can get over the shortcomings that the approaches taking the vegetation characters as main indicators are greatly influenced by the variation of annual rainfall. This new approach emphasizes the common characteristics of different types of desertification, so it can be applied in assessments of many types of desertification by remote sensing.
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Received: 31 August 2004
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