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Analysis of Temporal Evolution Characteristics of Annual Precipitation in the Yellow River Delta

机译:黄河三角洲年降水量的时间演化特征分析

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Precipitation is an important component in the climate system and plays a key role in water resources protection, drought and flood prevention. Innovation Trend Analysis (ITA) method, R/S method, maximum entropy spectrum analysis and wavelet analysis were used to study the evolution characteristics of the Yellow River Delta annual precipitation from 1954 to 2014. The results suggest that the precipitation series changed significantly and showed an overall downward trend, and may show an upward trend in the future, which is relatively strong. There are three-time scales of annual precipitation variation: 20-32a, 8-18a, and 3-6a. The quasi-27 year was the main oscillation period of the average annual precipitation in the Yellow River Delta, the secondary major period was 13 years, and the small-scale oscillation period was 5 years. Precipitation changed suddenly in 1980 and 2003. In contrast, there was no significant mutation point in 2002-2014.
机译:降水是气候系统中的重要组成部分,在水资源保护,干旱和防洪中发挥关键作用。 创新趋势分析(ITA)方法,R / S方法,最大熵谱分析和小波分析研究了1954年至2014年黄河三角洲降水量的演化特性。结果表明降水系列变化显着变化并显示出来 总体下降趋势,并可能在未来的上升趋势,这相对较强。 年降水量有三次降水变化:20-32A,8-18A和3-6A。 准27年是黄河三角洲平均降水量的主要振荡期,二次主要时间为13岁,小规模振荡期为5年。 1980年和2003年降水突然发生了变化。相比之下,2002 - 2014年没有显着的突变点。

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