Climate change is the meteorological alterations that occurred in the past by natural causes, which is occurring today and being intensified by the human behavior. Some of the main consequences of these alterations are: increase in the air temperature, changes in the hydrological cycle and occurrence of extreme weather events with greater intensity and frequency. This work was performed in Alto Camaquã in the Pampa Biome, which is considered as a region of stability and of great importance for biodiversity conservation. The main economical and sociocultural activity in the region is livestock run by different families, which is also considered fundamental for the maintenance of this biome. The objective of this work was to infer information on hydric deficit in Alto Camaquã watershed related to the increase in the air temperature and its impacts on family livestock. For this purpose, we estimated the climatic water balance (CWB) derived from pluviometric and meteorological data. We also estimated the maximum capacity of available water for the period between 1990 and 2016 and also for the predictive scenarios when an increase as well as no change in the air temperature occur. It has been observed that there will be hydric deficit during the summer, except for Rainy Year, independent on whether a change in the air temperature occurs or not. The results demonstrated that the effects of climate change are already occurring and that, even if the ongoing climate change stops before the predictions come true, the hydric deficit has already been experienced by the society.

气候变化是过去因自然原因而发生的气象变化，现在正在发生并因人类行为而加剧。这些变化的一些主要后果是：气温升高、水文循环发生变化以及出现强度和频率更高的极端天气事件。这项工作是在潘帕生物群系的 Alto Camaquã 进行的，该地区被认为是一个稳定的地区，对生物多样性保护具有重要意义。该地区的主要经济和社会文化活动是由不同家庭经营的牲畜，这也被认为是维持该生物群落的基础。这项工作的目的是推断与气温升高及其对家庭牲畜的影响有关的 Alto Camaquã 流域缺氢的信息。为此，我们估计了来自雨量和气象数据的气候水平衡 (CWB)。我们还估计了 1990 年至 2016 年期间可用水的最大容量，以及在气温升高但未发生变化时的预测情景。据观察，除雨季外，夏季都会出现缺水现象，这与气温是否发生变化无关。结果表明，气候变化的影响已经发生，即使持续的气候变化在预测成真之前停止，