Spatiotemporal Analysis of Hydrometeorological Factors in the Source Region of the Dongting Lake Basin, China
The Dongting Lake basin, located in the middle Yangtze River region, has long been under the threat of climate change. However, there has been a lack of comprehensive analysis and research on the long-term trends and interactions among hydrometeorological factors within the region. To address this g...
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| Format: | Article |
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MDPI AG
2023-12-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/14/12/1793 |
| _version_ | 1797382126911356928 |
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| author | Shanshan Li Changbo Jiang Yuan Ma Chuannan Li |
| author_facet | Shanshan Li Changbo Jiang Yuan Ma Chuannan Li |
| author_sort | Shanshan Li |
| collection | DOAJ |
| description | The Dongting Lake basin, located in the middle Yangtze River region, has long been under the threat of climate change. However, there has been a lack of comprehensive analysis and research on the long-term trends and interactions among hydrometeorological factors within the region. To address this gap, this study collected data from 31 meteorological stations in the region and employed statistical analysis methods, including the non-parametric Mann–Kendall test, Sen’s slope test, and cross-wavelet analysis. The results revealed significant increases in temperatures, especially in the spring season, while summer, winter, and annual rainfall also exhibited a significant increase. However, spring and autumn rainfall showed a non-significant decrease, and there was a clear decreasing trend in annual streamflow. Interestingly, evaporation demonstrated a significant increasing trend. The annual average temperature and annual runoff exhibited approximately negative correlations in the 6–10-year resonance period and positive correlations in the 4–6-year resonance period. There are significant positive resonance periods in the relationship between annual precipitation and annual runoff within the range of 0–12 years, indicating that precipitation has a substantial impact and serves as the primary source of runoff. Furthermore, there was a transition between “abundance” and “dry” periods in the annual runoff around 4 a, occurring before and after 1973 and 2005. The change points in annual precipitation and runoff were identified as 1993 and 1983. |
| first_indexed | 2024-03-08T21:01:00Z |
| format | Article |
| id | doaj.art-cab8799d2632455bbaa1ae2707e5c9bb |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-08T21:01:00Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
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| series | Atmosphere |
| spelling | doaj.art-cab8799d2632455bbaa1ae2707e5c9bb2023-12-22T13:52:53ZengMDPI AGAtmosphere2073-44332023-12-011412179310.3390/atmos14121793Spatiotemporal Analysis of Hydrometeorological Factors in the Source Region of the Dongting Lake Basin, ChinaShanshan Li0Changbo Jiang1Yuan Ma2Chuannan Li3School of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, ChinaSchool of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, ChinaSchool of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, ChinaSchool of Hydraulic Engineering, Changsha University of Science & Technology, Changsha 410114, ChinaThe Dongting Lake basin, located in the middle Yangtze River region, has long been under the threat of climate change. However, there has been a lack of comprehensive analysis and research on the long-term trends and interactions among hydrometeorological factors within the region. To address this gap, this study collected data from 31 meteorological stations in the region and employed statistical analysis methods, including the non-parametric Mann–Kendall test, Sen’s slope test, and cross-wavelet analysis. The results revealed significant increases in temperatures, especially in the spring season, while summer, winter, and annual rainfall also exhibited a significant increase. However, spring and autumn rainfall showed a non-significant decrease, and there was a clear decreasing trend in annual streamflow. Interestingly, evaporation demonstrated a significant increasing trend. The annual average temperature and annual runoff exhibited approximately negative correlations in the 6–10-year resonance period and positive correlations in the 4–6-year resonance period. There are significant positive resonance periods in the relationship between annual precipitation and annual runoff within the range of 0–12 years, indicating that precipitation has a substantial impact and serves as the primary source of runoff. Furthermore, there was a transition between “abundance” and “dry” periods in the annual runoff around 4 a, occurring before and after 1973 and 2005. The change points in annual precipitation and runoff were identified as 1993 and 1983.https://www.mdpi.com/2073-4433/14/12/1793spatiotemporal trendhydroclimatic variablesthe Dongting Lake basin |
| spellingShingle | Shanshan Li Changbo Jiang Yuan Ma Chuannan Li Spatiotemporal Analysis of Hydrometeorological Factors in the Source Region of the Dongting Lake Basin, China Atmosphere spatiotemporal trend hydroclimatic variables the Dongting Lake basin |
| title | Spatiotemporal Analysis of Hydrometeorological Factors in the Source Region of the Dongting Lake Basin, China |
| title_full | Spatiotemporal Analysis of Hydrometeorological Factors in the Source Region of the Dongting Lake Basin, China |
| title_fullStr | Spatiotemporal Analysis of Hydrometeorological Factors in the Source Region of the Dongting Lake Basin, China |
| title_full_unstemmed | Spatiotemporal Analysis of Hydrometeorological Factors in the Source Region of the Dongting Lake Basin, China |
| title_short | Spatiotemporal Analysis of Hydrometeorological Factors in the Source Region of the Dongting Lake Basin, China |
| title_sort | spatiotemporal analysis of hydrometeorological factors in the source region of the dongting lake basin china |
| topic | spatiotemporal trend hydroclimatic variables the Dongting Lake basin |
| url | https://www.mdpi.com/2073-4433/14/12/1793 |
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