Rainfall redistribution by forest cover has potential hydrological impacts in semi-arid regions due to continuous human intervention. Studying the process of interception loss by Caatinga vegetation and its changes due to deforestation is extremely important for local hydrology. However, such information is scarce in the literature. This study examined the partitioning of rainfall into throughfall (TF), stemflow (SF) and interception loss (I) in the Caatinga vegetation (CAA) and evaluated the influence of rainfall characteristics on this partitioning. The components of rainfall partitioning were measured from 2016 to 2017 to determine the TF and SF respectively, and their relationships with rainfall characteristics were evaluated based on linear regression models. For the Caatinga vegetation, TF and SF represent 89.2% and 0.5% of the gross rainfall, while interception loss was 10.3%, an expressive value that should be included in regional water balance models. The rainfall characteristics were able to explain the variations in water partitioning, showing that TF and SF increase for events of higher intensity and volume, whereas interception loss is mainly associated with events of longer duration. For the Caatinga, stemflow and throughfall usually occur for events of greater than 1.65 mm and 0.98 mm, while values for canopy water storage ranged from 0.88 mm to 1.16 mm. It is concluded that for semi-arid environments, these values are significant and cannot be ignored when managing local water resources.

由于持续的人为干预，森林覆盖区的降雨重新分布在半干旱地区可能产生水文影响。对Caatinga植被的截留损失及其因森林砍伐而引起的变化进行研究对于当地水文研究极为重要。但是，这种信息在文献中很少。这项研究检查了降雨在Caatinga植被（CAA）中的划分为贯穿流（TF），茎流（SF）和截留损失（I），并评估了降雨特征对该分区的影响。从2016年至2017年测量了降雨分配的成分，分别确定了TF和SF，并基于线性回归模型评估了它们与降雨特征的关系。对于Caatinga植被，TF和SF分别表示89.2％和0。总降雨的5％，而截留损失为10.3％，这是应该包含在区域水平衡模型中的表示值。降雨特征能够解释水分配的变化，表明强度和体积较大的事件的TF和SF增加，而截距损失主要与持续时间较长的事件有关。对于Caatinga，通常在大于1.65 mm和0.98 mm的事件中发生茎流和穿透，而冠层蓄水量的范围为0.88 mm至1.16 mm。结论是，对于半干旱环境，这些值很重要，在管理本地水资源时不能忽略。降雨特征能够解释水分配的变化，表明强度和体积较大的事件的TF和SF增加，而截距损失主要与持续时间较长的事件有关。对于Caatinga，通常在大于1.65 mm和0.98 mm的事件中发生茎流和穿透，而冠层蓄水量的范围为0.88 mm至1.16 mm。结论是，对于半干旱环境，这些值很重要，在管理本地水资源时不能忽略。降雨特征能够解释水分配的变化，表明强度和体积较大的事件的TF和SF增加，而截距损失主要与持续时间较长的事件有关。对于Caatinga，通常在大于1.65 mm和0.98 mm的事件中发生茎流和穿透，而冠层蓄水量的范围为0.88 mm至1.16 mm。结论是，对于半干旱环境，这些值很重要，在管理本地水资源时不能忽略。冠层蓄水量的范围为0.88毫米至1.16毫米。结论是，对于半干旱环境，这些值很重要，在管理本地水资源时不能忽略。冠层蓄水量的范围为0.88毫米至1.16毫米。结论是，对于半干旱环境，这些值很重要，在管理本地水资源时不能忽略。