Feasibility Analysis and Improvement of Comprehensive Meteorological Drought Index in Chongzuo
For the “unreasonably worse drought” showed by the comprehensive meteorological drought index, this paper proposes a non-linear unequal weight calculation method and an improved comprehensive meteorological drought index (CI<sub>43</sub>), and analyzes the applicability of CI<sub>4...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Pearl River
2020-01-01
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| Series: | Renmin Zhujiang |
| Subjects: | |
| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2020.03.005 |
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| Summary: | For the “unreasonably worse drought” showed by the comprehensive meteorological drought index, this paper proposes a non-linear unequal weight calculation method and an improved comprehensive meteorological drought index (CI<sub>43</sub>), and analyzes the applicability of CI<sub>43</sub> in drought monitoring and evaluation based on historical data at 12 metrological stations in Chongzuo from 1961 to 2015. The results showed that: ① The monitoring results by CI and CI<sub>43</sub> are relatively close on the drought monitoring process. The improved CI<sub>43</sub> avoids effectively the unreasonably worse drought showed by CI; ② The corrected drought grade standard of CI<sub>43</sub> avoids the overestimating or underestimating the drought grade, so the evaluation results by CI<sub>43</sub> are more scientific and reasonable; ③ The monitoring results by CI<sub>43</sub> on the occurrence, development and relief of drought are more consistent with the actual drought. Therefore, we can concluded that the CI<sub>43</sub> is more suitable for drought monitoring and evaluation in Chongzuo. |
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| ISSN: | 1001-9235 |