| Meteorological\|hydrological drought propagation and response in Shaanxi Province based on ERA-5 dataset |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2025.01.27 |
| Key Words: meteorological drought hydrological drought propagation response time Shaanxi Province |
| Author Name | Affiliation | | SHEN Manhua | State Key Laboratory of Ecological Hydrology in Northwest Arid Regions, Xi’an University of Science and Technology, Xi’an, Shaanxi 710000, China | | HUANG Lingmei | State Key Laboratory of Ecological Hydrology in Northwest Arid Regions, Xi’an University of Science and Technology, Xi’an, Shaanxi 710000, China | | YU Xiaobo | State Key Laboratory of Ecological Hydrology in Northwest Arid Regions, Xi’an University of Science and Technology, Xi’an, Shaanxi 710000, China | | SHEN Ao | State Key Laboratory of Ecological Hydrology in Northwest Arid Regions, Xi’an University of Science and Technology, Xi’an, Shaanxi 710000, China | | SHI Rongqing | State Key Laboratory of Ecological Hydrology in Northwest Arid Regions, Xi’an University of Science and Technology, Xi’an, Shaanxi 710000, China | | LI Jia | State Key Laboratory of Ecological Hydrology in Northwest Arid Regions, Xi’an University of Science and Technology, Xi’an, Shaanxi 710000, China |
|
| Hits: 2 |
| Download times: 2 |
| Abstract: |
| Using ERA-5 land reanalysis monthly\|scale precipitation and runoff data, we calculated the standardized precipitation index (SPI3) and standardized runoff index (SRI) for Shaanxi Province from 1952 to 2022. To analyze the propagation and response characteristics of meteorological and hydrological droughts, we employed the Mann-Kendall (M-K) test, run theory, and Pearson’s correlation coefficient. The results showed that: (1) Meteorological droughts occurred more frequently than hydrological droughts in Shaanxi Province, and there was a significant spatial difference in the frequency of the two, with more meteorological droughts occurring in northern Shaanxi, and more hydrological droughts occurring in central and eastern Guanzhong, and southern Shaanxi. (2) SPI3 and SRI3 in Shaanxi Province as a whole exhibited a decreasing trend over the years, with significant spatial and temporal differences in their persistence. The Hurst index of SPI3 showed minimal changes and weak persistence, while SRI3 demonstrated larger changes. Persistence was strongest in northern Shaanxi, moderate in Guanzhong, and weakest in southern Shaanxi. (3) The meteorological\|hydrological drought propagation rate of northern Shaanxi was the lowest, Guanzhong was the second highest, and southern Shaanxi was the highest. In the occurrence of meteorological light drought and extreme drought, the maximum possibility of hydrological drought of the same level occurred immediately. (4) Spatially, the meteorological\|hydrological drought response time in Shaanxi Province was divided by the Qinling Mountains, with a faster response in the south and a slower response in the north. Temporally, summer exhibited the highest sensitivity and the quickest response, while spring showed the slowest response. The meteorological\|hydrological correlation was weakest in the high\|elevation areas of northern Shaanxi Province, remaining below 0.5 throughout the year. |
|
|
|