人民黄河Issue(11)：11-14,4.DOI:10.3969/j.issn.1000-1379.2015.11.004
洮河流域降水量的多时间尺度特征及趋势分析
Analysis on Long-Time Scale Characteristics of Precipitation and Future Trend of Taohe River Basin
段志勇 1凡炳文1
作者信息
- 1. 甘肃省水文水资源局，甘肃 兰州730000
- 折叠
摘要
Abstract
Based on the precipitation data of Taohe River basin and surrounding rain-gauges from 1956 to 2013 and using Wavelet analysis method, it involved precipitation changing trend of Taohe River basin during recent 58 a, the changing process of the long-time scale main cycle and its spatial variation characteristics, and the forecast analysis about its future trend. The results have shown that the overall annual precipitation in the Taohe River basin has a tendency to decrease at an average rate of -4. 60 mm/10 a. Then, periodic variation of annual precipitation has 3 scales of 20 a, 12 a and 5 a respectively, in which 20 a scale periodic oscillation is the strongest and goes through the whole time domain. Next, it has obvious difference in spatial distribution that the cycle fluctuation about each scale around downstream area is significantly stronger than that of the upstream region. Finally, expectation can be made that during the period of 2014-2021, except somewhat less in 2017, the rest of the years will be in the normal or somewhat higher years.关键词
小波分析/多时间尺度特征/降水量/洮河流域Key words
wavelet analysis/long-time scale characteristics/precipitation/Taohe River basin分类
天文与地球科学引用本文复制引用
段志勇,凡炳文..洮河流域降水量的多时间尺度特征及趋势分析[J].人民黄河,2015,(11):11-14,4.
