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首页> 外文期刊>International Journal of Environment and Pollution Research >Spatio-temporal Validation of Multi-Source Satellite Rainfall Products in the Upper Tekeze-Atbara Basin, Ethiopia
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Spatio-temporal Validation of Multi-Source Satellite Rainfall Products in the Upper Tekeze-Atbara Basin, Ethiopia

机译：埃塞俄比亚特克泽-阿特巴拉盆地上游盆地多源卫星降水产品的时空验证

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摘要

Precise and reliable rainfall data is crucial for regional water resource management. However, rainfall data in Ethiopia mainly characterized by sparse distribution and temporal inconsistency. Therefore, the spatial and temporal patterns of rainfall are poorly understood in the major basins. Recently, satellite rainfall products (SRPs) have been applied as an alternative source to obtain long-term rainfall data. This study evaluated the performance of three different SRPs, namely CHIRPS, PERSIANN_CDR, and TMPA3B42, with respect to observed data in the Upper Tekeze-Atbara River Basin using different statistical indices. The result showed that PERSIANN_CDR had very low PBIAS than other products. The PERSIANN_CDR had a slight overestimation tendency, while the CHIRPS and TMPA3B42 considerably overestimated observation rainfall. The PERSIANN_CDR performed well for kiremt, belg, and bega season, with the lowest RMSE value of 2.9, 1.4, and 0.8 mm/day, respectively. On the contrary, TMPA3B42 poorly performed for kiremt, belg, and bega seasons with the largest RMSE value of 3.1, 1.9, and 1.1 mm/day, respectively. The PERSIANN_CDR had the best skill to detect observation rainfall, while the CHIRPS had the worst detecting skill during all seasons. In kiremt seasons, the PERSIANN_CDR product showed a good estimation of the observed rainfall almost in all parts of the basin except for a slight overestimation in northwestern and underestimation in southwestern regions. Overall, the findings of this study demonstrated the PERSIANN_CDR product potentials and use for analyzing rainfall distribution and variability in Ethiopia's Upper Tekeze-Atbara River Basin.
机译：精确和可靠的降雨数据是至关重要的区域水资源管理。降雨数据在埃塞俄比亚主要的特征稀疏分布和时间不一致。因此,空间和时间模式降雨主要是知之甚少盆地。(srp)应用作为替代来源获得长期降雨数据。评估三种不同的性能srp,即啾啾,PERSIANN_CDR TMPA3B42,对观察到的数据上使用不同Tekeze-Atbara流域统计指标。PERSIANN_CDR PBIAS比其他的人很少产品。过高的倾向,而啾啾TMPA3B42大大高估了观察降雨。kiremt belg,这时季节,最低的RMSE值为2.9、1.4和0.8毫米/天,分别。执行kiremt belg,这时季节最大的RMSE值为3.1、1.9和1.1mm /天,分别。最好的技术来检测观察降雨,虽然唧唧时最糟糕的检测技能所有的季节。产品显示观察到的一个很好的估计降雨几乎所有地区的盆地除了在西北和轻微高估在西南地区低估。本研究的结果证明了PERSIANN_CDR产品潜力和使用分析降雨分布和变化在埃塞俄比亚的上Tekeze-Atbara流域。

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