| Applicability analysis of three compound drought indexes in three major agricultural production areas in China |
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| DOI：10.7606/j.issn.1000-7601.2020.01.32 |
| Key Words: agricultural drought compound drought indexes agricultural major production area winter\|wheat summer\|corn rice applicability analysis |
| Author Name | Affiliation | | WANG Siqi | Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climatic Change and Reducing Disaster of CMA, Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Lanzhou, Gansu 730020, China
State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, Hubei 430079, China | | ZHANG Xiang | Institute of Arid Meteorology, CMA, Key Laboratory of Arid Climatic Change and Reducing Disaster of CMA, Key Laboratory of Arid Climatic Change and Reducing Disaster of Gansu Province, Lanzhou, Gansu 730020, China
State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, Hubei 430079, China | | CHEN Nengcheng | State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, Hubei 430079, China
Collaborative Innovation Center of Geospatial Technology, Wuhan, Hubei 430079, China |
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| Abstract: |
| In this paper, the applicability of three compound drought indexes (PADI, OVDI, and TVDI) in three main agricultural production areas (winter wheat, summer corn, and rice) in China was analyzed using multi\|source remote sensing data, through the linear correlation analysis with SPI-3 and comparison with the actual drought situation. The results showed that: (1) The three kinds of compound drought indexes were not suitable for drought monitoring in rice region. (2) In the drought monitoring of three types of agricultural areas, PADI and TVDI were more accurate in quantifying the drought situation (E.g. duration, severity, and spatial distribution), while OVDI was overvalued in judging the severity of drought. (3) TVDI and OVDI were suitable for large\|scale drought monitoring, while the monitoring results of TVDI were more accurate. (4) Because of the combination of crop information, PADI was more comprehensive in drought quantification and suitable for small\|range drought monitoring, which requires higher input information. |
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