The Arab region is characterized by water scarcity, extreme droughts and floods. This paper aims to utilize the global datasets of rainfall, evapotranspiration (ET), Normalized Difference Vegetation Index (NDVI), Gravity Recovery and Climate Experiment (GRACE) satellites and Data Assimilation of GLDAS to assess the spatiotemporal variability of water resource components over the Arab region. The results indicate that the Terrestrial water storage (TWS) are declining in most of the countries over the analysis period (2002–2015). The long-term analysis indicates that 2008 was the driest year and a distinctive deflection point for a declining trend of TWS. Non-parametric trend analysis test of Man-Kendall showed that trend of rainfall, NDVI, ET are not statistically significant except in some regions. The highest TWS volume of about +1586.9 Million Cubic Meter was found in Sudan, evidenced by rainfall. The study provides a guide for stakeholders to manage water resources in all countries separately.

阿拉伯地区的特点是缺水，极端干旱和洪水。本文旨在利用全球降雨，蒸散量（ET），归一化植被指数（NDVI），重力恢复和气候实验（GRACE）卫星以及GLDAS数据同化的全球数据集来评估阿拉伯地区水资源成分的时空变异性地区。结果表明，在分析期内（2002-2015年），大多数国家的陆地储水量（TWS）正在下降。长期分析表明，2008年是最干旱的年份，也是TWS下降趋势的一个明显拐点。Man-Kendall的非参数趋势分析测试表明，除某些地区外，降雨，NDVI，ET的趋势没有统计学意义。TWS的最高交易量约为+1586。在苏丹发现了900万立方米，这可以通过降雨来证明。该研究为利益相关者分别管理所有国家的水资源提供了指南。