Analysis of Variation Characteristics of Precipitation Series from 1970 to 2019 in Qingyuan City
In order to understand the variation characteristics of precipitation in Qingyuan City in recent decades,and realize the scientific management and utilization of water resources,based on the measured precipitation data of six representative hydrologic stations in Qingyuan from 1970 to 2019,this pape...
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| Main Author: | |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Pearl River
2021-01-01
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| Series: | Renmin Zhujiang |
| Subjects: | |
| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2021.06.012 |
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| Summary: | In order to understand the variation characteristics of precipitation in Qingyuan City in recent decades,and realize the scientific management and utilization of water resources,based on the measured precipitation data of six representative hydrologic stations in Qingyuan from 1970 to 2019,this paper analyzes and studies the trend change,sudden change and periodic characteristics of annual precipitation in Qingyuan by moving average method,Mann-Kendall test method and Morlet wavelet analysis method.The results show that:The annual precipitation of Qingyuan Station and Zhukeng Station showed a decreasing trend,while that of Damiaoxia Station,Yingde Station,Yangshan Station and Lianxian Station showed an increasing trend,but the change was not significant.The sudden drop occurred around 1975 for Qingyuan Station and Yingde Station,around 2015 for Damiaoxia Station and Lianxian Station,around 1982 for Zhukeng Station.and around 1973 and 2015 for Yangshan Station.The precipitation series of each station has obvious alternation of wet and dry seasons.There are 3 to 4 main periods of precipitation at each station.The first and second main periods are generally 22 or 15 years,and the third and fourth main periods are generally 7 or 3 years.After 2015,the annual precipitation at each station turned into a decreasing trend.Currently,Qingyuan is in a period of low precipitation. |
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| ISSN: | 1001-9235 |