| Cite this article: | 燕.大柴旦地区降雨、温度及蒸发变化特征分析[J].灌溉排水学报,0,():-. |
| 齐.大柴旦地区降雨、温度及蒸发变化特征分析[J].灌溉排水学报,0,():-. |
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| Analysis on the variation characteristics of rainfall, temperature and evaporation in Da Qaidam agricultural area |
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齐
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长安大学
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| Abstract: |
| Abstract:【Objective】Explore the key meteorological elements that affect the production of rain-fed agriculture: the change characteristics of temperature, precipitation and evaporation.【Method】This study used the data of monthly meteorological data from Da Chaidan area during the period from 1956 to 2017, Linear tendency estimation, Mann-Kendall test and Morlet wavelet analysis was used to analyze the characteristics of precipitation, temperature and evaporation in this area.【Result】The results show that: in Da Chaidan area, precipitation and temperature presented an increasing trend and the evaporation presented a downward trend from 1956 to 2017. Through the Mann-Kendall test, it is determined that 2001—2002 is the increasing catastrophe point of precipitation sequence, the temperature sequence has no catastrophe point, and 1998—1999 is the catastrophe point of evaporation sequence. The precipitation had the periodicity of 8, 19, and 29 a; The temperature had the periodicity of 5, 9, 14, and 19 a; The evaporation had the periodicity of 10 a and 18 a.【Conclusion】It is predicted that the precipitation in the Dachaidan area will be in a period of small cycles of reduction in the next few years, the temperature will be in the rising phase, and the annual evaporation will be in a period of reduction. |
| Key words: Key Words：precipitation；temperature；evaporation；Mann-Kendall test；Morlet wavelet；Da Qaida |
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