Variations in Summer Precipitation According to Different Grades and Their Effects on Summer Drought/Flooding in Haihe River Basin
The variations in summer precipitation according to different grades and their effects on summer drought/flooding in the Haihe River basin were analyzed using the daily precipitation data from 161 meteorological stations from 1972 to 2021. The results showed that the number of rainy days (NRD) in su...
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| Format: | Article |
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MDPI AG
2022-08-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/13/8/1246 |
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| author | Shanjun Cheng Jun Xie Ning Ma Sujie Liang Jun Guo Ning Fu |
| author_facet | Shanjun Cheng Jun Xie Ning Ma Sujie Liang Jun Guo Ning Fu |
| author_sort | Shanjun Cheng |
| collection | DOAJ |
| description | The variations in summer precipitation according to different grades and their effects on summer drought/flooding in the Haihe River basin were analyzed using the daily precipitation data from 161 meteorological stations from 1972 to 2021. The results showed that the number of rainy days (NRD) in summer in the Haihe River basin significantly declined in the past 50 years, mainly due to the reduction in the number of light-rain days. The precipitation amount (PA) exhibited prominent interdecadal characteristics, showing an upward tendency in the past 20 years accompanied by a remarkable increase in the proportion of torrential rain. The NRD in the northern part of the basin significantly decreased, while the PA in the southeast showed an increasing trend. Summer drought/flooding was strongly linked to the changes in the NRD and was predominantly affected by intense precipitation, with contribution rates of 5.5%, 16.8%, 31.2%, and 46.5% from light, moderate, heavy, and torrential rain, respectively. The effects of torrential rain increased in recent decades, particularly in the flooding scenarios. In addition, July was the critical period for summer drought/flooding, with the major influence of heavy and torrential rain. The most intense summer rainfall event in the Haihe River basin could contribute from 15% to 29% of total precipitation, resulting in changes in the severity and state of summer drought/flooding, which indicated that the precipitation process had a decisive impact on seasonal drought/flooding. Therefore, when predicting summer precipitation in the Haihe River basin, it is necessary to pay attention to the intense rainfall events during critical periods. |
| first_indexed | 2024-03-09T04:42:06Z |
| format | Article |
| id | doaj.art-9868056e34e34899a009265d60955dda |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-09T04:42:06Z |
| publishDate | 2022-08-01 |
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| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-9868056e34e34899a009265d60955dda2023-12-03T13:19:29ZengMDPI AGAtmosphere2073-44332022-08-01138124610.3390/atmos13081246Variations in Summer Precipitation According to Different Grades and Their Effects on Summer Drought/Flooding in Haihe River BasinShanjun Cheng0Jun Xie1Ning Ma2Sujie Liang3Jun Guo4Ning Fu5Tianjin Climate Center, Tianjin 300074, ChinaTianjin Climate Center, Tianjin 300074, ChinaTianjin Climate Center, Tianjin 300074, ChinaTianjin Climate Center, Tianjin 300074, ChinaTianjin Climate Center, Tianjin 300074, ChinaCollege of Air Traffic Management, Civil Aviation University of China, Tianjin 300399, ChinaThe variations in summer precipitation according to different grades and their effects on summer drought/flooding in the Haihe River basin were analyzed using the daily precipitation data from 161 meteorological stations from 1972 to 2021. The results showed that the number of rainy days (NRD) in summer in the Haihe River basin significantly declined in the past 50 years, mainly due to the reduction in the number of light-rain days. The precipitation amount (PA) exhibited prominent interdecadal characteristics, showing an upward tendency in the past 20 years accompanied by a remarkable increase in the proportion of torrential rain. The NRD in the northern part of the basin significantly decreased, while the PA in the southeast showed an increasing trend. Summer drought/flooding was strongly linked to the changes in the NRD and was predominantly affected by intense precipitation, with contribution rates of 5.5%, 16.8%, 31.2%, and 46.5% from light, moderate, heavy, and torrential rain, respectively. The effects of torrential rain increased in recent decades, particularly in the flooding scenarios. In addition, July was the critical period for summer drought/flooding, with the major influence of heavy and torrential rain. The most intense summer rainfall event in the Haihe River basin could contribute from 15% to 29% of total precipitation, resulting in changes in the severity and state of summer drought/flooding, which indicated that the precipitation process had a decisive impact on seasonal drought/flooding. Therefore, when predicting summer precipitation in the Haihe River basin, it is necessary to pay attention to the intense rainfall events during critical periods.https://www.mdpi.com/2073-4433/13/8/1246different precipitation gradessummer drought and floodingnumber of rainy daysintense rainfall eventHaihe River basin |
| spellingShingle | Shanjun Cheng Jun Xie Ning Ma Sujie Liang Jun Guo Ning Fu Variations in Summer Precipitation According to Different Grades and Their Effects on Summer Drought/Flooding in Haihe River Basin Atmosphere different precipitation grades summer drought and flooding number of rainy days intense rainfall event Haihe River basin |
| title | Variations in Summer Precipitation According to Different Grades and Their Effects on Summer Drought/Flooding in Haihe River Basin |
| title_full | Variations in Summer Precipitation According to Different Grades and Their Effects on Summer Drought/Flooding in Haihe River Basin |
| title_fullStr | Variations in Summer Precipitation According to Different Grades and Their Effects on Summer Drought/Flooding in Haihe River Basin |
| title_full_unstemmed | Variations in Summer Precipitation According to Different Grades and Their Effects on Summer Drought/Flooding in Haihe River Basin |
| title_short | Variations in Summer Precipitation According to Different Grades and Their Effects on Summer Drought/Flooding in Haihe River Basin |
| title_sort | variations in summer precipitation according to different grades and their effects on summer drought flooding in haihe river basin |
| topic | different precipitation grades summer drought and flooding number of rainy days intense rainfall event Haihe River basin |
| url | https://www.mdpi.com/2073-4433/13/8/1246 |
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