| 罗琳,王忠静,刘晓燕,张学成.黄河流域中游典型支流汛期降雨特性变化分析[J].水利学报,2013,44(7): |
| 黄河流域中游典型支流汛期降雨特性变化分析 |
| Changes in characteristics of precipitation in flood season over five typical basins of middle reaches of the Yellow River in China |
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| DOI： |
| 中文关键词: 降雨强度 趋势分析 小时雨强 气候变化 |
| 英文关键词: precipitation intensity trend analysis hourly precipitation climatic change |
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| 中文摘要: |
| 选取黄河流域中游5 条典型支流，基于74 个雨量站点1980—2009 年的日降雨数据和汛期降雨摘要数据（1~5h精度），利用Mann-Kendall趋势检验与突变检验方法分析研究区域内的汛期降雨特性变化。将次降雨按照场次雨量分级为小雨、中雨、大雨和暴雨，按照场次平均雨强分级为低雨强、中雨强和高雨强降雨，统计各级别的雨量、雨强、频次及历时等，综合探讨不同级别的降雨特性变化。结果表明，区域内汛期降雨总量有略微的增加，而雨强大幅减少；小雨、低雨强降雨的雨型转变明显，暴雨、高雨强降雨受到的影响相对较弱。本文对于理解以超渗产流为主的黄土高原区的产流模式有重要意义。 |
| 英文摘要: |
| Five typical loess plateau basins of middle reaches of the Yellow River in China were chosen in this study，characteristics from June to September（JJAS） of the flood season were carefully analyzed by using quality controlled high-precision data （timescale between 1 to 5 hour） from 74 rain gauges over the past 30 years （1980-2009）. Mann-Kendall trend method was applied to detect the trend and change point of precipitation time series. Each rainfall event was graded according to some criteria，（1） light rain，moderate rain，heavy rain and heavy rain were graded by the amount of each event；（2）low intensity，medium
intensity and high intensity rain were graded by the intensity of each event. The amount， intensity， frequency and duration of each rainfall level were found by using statistics. Overall，there is a slight increase of the total precipitation in JJAS and a significant reduction of the average rainfall intensity in the study region. Huge shifts are found in the regime of light rain and low intensity rain，while heavy rain and high intensity rain show little change. Results of this paper could be important for improving hydrological understanding in Loess Plateau. |
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