青藏高原降雨“雨强-历时-频率”曲线数据集(1/30°)
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针对青藏高原地区极端降雨数据匮乏、无法较好支撑高原山洪灾害预警工作的现实困难,研究基于青藏高原及其周边共203个站点1951-2018年5月~9月的观测降雨数据,采用主成分分析与随机森林回归算法,构建了青藏高原降雨“雨强-历时-频率”曲线数据集。本数据集空间分辨率为1/30°,可提供重现期5年、10年、20年、50年、100年下的1h、2h、3h、6h、12h、24h降雨量,为山洪灾害预警、洪水风险分析等研究提供可靠的基础数据支撑。
To address the practical challenge of inadequate extreme rainfall data over the Qinghai-Tibet Plateau, which cannot sufficiently support flash flood disaster warning efforts on the plateau, this study utilized observed rainfall data from a total of 203 meteorological stations across the Qinghai-Tibet Plateau and its surrounding regions from May to September during 1951–2018. Employing Principal Component Analysis (PCA) and Random Forest Regression algorithms, we developed a rainfall Intensity-Duration-Frequency (IDF) curve dataset for the Qinghai-Tibet Plateau. This dataset features a spatial resolution of 1/30°, and provides rainfall amounts with durations of 1 h, 2 h, 3 h, 6 h, 12 h and 24 h under return periods of 5, 10, 20, 50 and 100 years. It offers reliable fundamental data support for research including flash flood disaster warning and flood risk analysis.




