Application of Perpendicular Drought Index in the Drought Assessment: A Case Study in Ningxia Huizu Autonomous Region of China Using MODIS Data | |
Qin, Qiming ; Ghulam, Abduwasit ; Zhu, Lin ; Wang, Lianxi ; Li, Jianping | |
2006 | |
关键词 | drought monitoring PDI Ningxia ANATOMY |
英文摘要 | In this paper, 1) atmospheric correction for nir and red channels of remote sensing imagery is carried out by 6S code, and nir-red spectral reflectance space is obtained using atmospheric and geometric corrected MODIS data; 2) perpendicular drought index (PDI) is calculated using MODIS data on the basis of the distribution characteristics of soil moisture in the nir-red spectral reflectance space; 3) sensitivity analysis and accuracy assessment of results contributed from upscaling of the PDI model to MODIS 500m spatial resolution is conducted; 4)finally, quantitative evaluation of drought condition of Ningxia, Northwestern China is carried out with PDI. Results show that satellite estimated drought values by PDI indicate significant negative correlation with 0 similar to 20cm averaged soil moisture obtained over the whole study area. Highest correlation is R(2)=0.53. It is evident from the results showing the spatial distribution of drought in. the Northwestern China that remote estimated drought information is highly accordant with field drought status.; Geosciences, Multidisciplinary; Remote Sensing; Imaging Science & Photographic Technology; EI; CPCI-S(ISTP); 0 |
语种 | 英语 |
DOI标识 | 10.1109/IGARSS.2006.790 |
内容类型 | 其他 |
源URL | [http://ir.pku.edu.cn/handle/20.500.11897/312053] |
专题 | 地球与空间科学学院 |
推荐引用方式 GB/T 7714 | Qin, Qiming,Ghulam, Abduwasit,Zhu, Lin,et al. Application of Perpendicular Drought Index in the Drought Assessment: A Case Study in Ningxia Huizu Autonomous Region of China Using MODIS Data. 2006-01-01. |
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