| IMERG卫星降水数据在嘉陵江流域的干旱监测效用评估 |
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| 引用本文： | 董永超,甘富万,高 扬,刁 庠,潘 越.IMERG卫星降水数据在嘉陵江流域的干旱监测效用评估[J].水文,2023,43(4). |
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| 作者姓名： | 董永超 甘富万 高 扬 刁 庠 潘 越 |
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| 作者单位： | 广西大学 土木建筑工程学院,广西大学 土木建筑工程学院,广西大学 土木建筑工程学院,广西大学 土木建筑工程学院,广西大学 土木建筑工程学院 |
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| 基金项目： | 国家自然科学基金(41807197)。 |
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| 摘 要： | 针对嘉陵江流域存在雨热同期,水旱灾害频发的现象,为快速且准确地把握流域内降水与干旱情况,利用覆盖范围广且分辨率高的网格化IMERG卫星降水数据对嘉陵江流域进行多时空尺度反演,并基于卫星降水数据采用标准化降水指数(SPI)对流域实行干旱监测。结果表明：1)根据分类指标与统计指标的计算结果,三种卫星降水数据中的IMERG-F能更准确地反映流域内的日降水量,与地面降水数据CC达0.737,整体高估地面降水2.6%,具有在干旱监测方面的应用潜力。2)三种卫星降水数据驱动的SPI指数在干旱监测方面存在一定的差异,IMERG-F驱动的SPI指数与地面降水数据驱动的SPI指数保持较高的一致性(CC>0.9),较近实时产品IMERG-F更能准确地呈现出流域的干湿特征。3)卫星识别降水与干旱监测的能力受地形地貌的影响,IMERG卫星降水数据在平原丘陵地带具有较好的适用性。
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| 关 键 词： | IMERG 卫星降水 SPI指数 干旱监测 嘉陵江流域 |
| 收稿时间： | 2022/5/2 0:00:00 |
| 修稿时间： | 2022/5/2 0:00:00 |
Evaluation of drought monitoring effectiveness of IMERG satellite precipitation data in Jialing River Basin |
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| DONG Yong-chao,GAN Fu-wan,GAO Yang,DIAO Xiang and PAN Yue.Evaluation of drought monitoring effectiveness of IMERG satellite precipitation data in Jialing River Basin[J].Hydrology,2023,43(4). |
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| Authors: | DONG Yong-chao GAN Fu-wan GAO Yang DIAO Xiang and PAN Yue |
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| Institution: | College of Civil Engineering and Architecture,Guangxi University,College of Civil Engineering and Architecture,Guangxi University,College of Civil Engineering and Architecture,Guangxi University,College of Civil Engineering and Architecture,Guangxi University,College of Civil Engineering and Architecture,Guangxi University |
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| Abstract: | In view of the phenomenon of simultaneous rain and heat and frequent flood and drought disasters in Jialing River Basin, in order to quickly and accurately grasp the precipitation and drought situation in the basin, the multi temporal and spatial scale inversion of Jialing River Basin is carried out by using the gridded IMERG satellite precipitation data with wide coverage and high resolution, and the standardized precipitation index (SPI) is used to monitor the drought in the basin based on the satellite precipitation data. The results show that: 1) according to the calculation results of classification indicators and statistical indicators, IMERG-F in the three satellite precipitation data can more accurately reflect the daily precipitation in the basin, and the cc with ground precipitation data is 0.737, which overestimates the ground precipitation by 2.6% as a whole, and has the application potential in drought monitoring. 2) The SPI indexes driven by three kinds of satellite precipitation data have some differences in drought monitoring. The SPI index driven by IMERG-F maintains high consistency with the SPI index driven by ground precipitation data (CC > 0.9). Compared with the near real-time product IMERG-F, it can more accurately show the dry and wet characteristics of the watershed. 3) The ability of satellite to identify precipitation and drought monitoring is affected by topography. IMERG satellite precipitation data has good applicability in plain and hilly areas. |
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| Keywords: | IMERG satellite precipitation SPI index drought monitoring Jialing River basin |
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