The Dena rainstorm in Iran in March and April 2019 caused about US$ 8.3 × 10⁹ damage in the country; however, it resulted in the replenishment of half of the dam reservoirs and 35% of ponds and lakes. Also, it increased the volume of groundwater stored in aquifers by 3.6 × 10⁹ m³. In arid and semiarid regions such as most parts of Iran, which usually face water scarcity, getting water from rainstorms is essential for replenishing water resources. This research aims to quantify the direct and indirect effects of the Dena rainstorm on the replenishment of Iran’s groundwater storage using the groundwater balance method and water-table fluctuation method. Studies showed that the main mechanisms for replenishment of groundwater storage due to the rainstorm included increases in precipitation recharge, surface runoff recharge, and artificial recharge, and reductions in irrigation withdrawal and evapotranspiration, while the contribution of each factor is estimated to be about 23, 28, 2, 15, and 32%, respectively.

2019 年 3 月和 4 月伊朗德纳暴雨对该国造成约 8.3 美元 × 10 ⁹损失；然而，它导致了一半的大坝水库和 35% 的池塘和湖泊的补水。此外，它使储存在含水层中的地下水量增加了 3.6 × 10 ⁹  m ³. 在伊朗大部分地区等干旱和半干旱地区，通常面临缺水，从暴雨中取水对于补充水资源至关重要。本研究旨在利用地下水平衡法和地下水位波动法量化德纳暴雨对伊朗地下水库补给的直接和间接影响。研究表明，暴雨补给地下水储量的主要机制包括降水补给、地表径流补给和人工补给的增加，以及灌溉用水和蒸散量的减少，而每个因素的贡献估计约为23，分别为 28、2、15 和 32%。