Climate analysis at relevant time scales is important for water resources management, agricultural planning, flood risk assessment, ecological modeling, and climate change adaptation. This study analyzes the spatiotemporal variability of climate on rainfall distribution for the Hare catchment of Ethiopia. Numerous hydroclimatic variables and scenarios were developed to assess the pattern of rainfall during different seasons. The average annual precipitation varies between −37.3%, +33.1%, and −38.2%, +61.2%, for RCP 4.5 and RCP 8.5, respectively. The anticipated declines in mean seasonal rainfall changes for the Bega and Belg seasons range from −69.6% to 88.4% and from −60.6% to 15.2% for RCP 4.5 and RCP 8.5, respectively. Climate models predict that the average periodic precipitation considered for the Kiremt season will vary from −12.1% to 1.33%. The Belg, Kiremt, and Bega seasons will likely see a 28.2%, 12.2%, and 22.6% drop in mean seasonal precipitation, respectively. The decrease in stream flow accompanied by the aforementioned climate scenarios (RCP 4.5 and RCP 8.5) can be as high as 19.6% and 6.7%, respectively. Also, the amount of discharge will reduce in the near future because of a substantial reduction in rainfall and a rise in evapotranspiration in the catchment. This decline in stream flow has its own effect on the future availability of water resources. The research finding is vital to environmental protection authority, decision makers, and scientific community to undertake climate change adaption techniques for rain scare areas. A program combined with multi-RCMs to evaluate climate change effects on hydrometeorology generated a novel approach to this research with appropriate adaptation mechanisms.

中文翻译：

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气候变率对埃塞俄比亚野兔流域降雨分布的协同效应

相关时间尺度的气候分析对于水资源管理、农业规划、洪水风险评估、生态建模和气候变化适应非常重要。本研究分析了埃塞俄比亚哈雷流域的气候时空变化对降雨分布的影响。开发了许多水文气候变量和情景来评估不同季节的降雨模式。对于RCP 4.5和RCP 8.5，年平均降水量分别在-37.3%、+33.1%和-38.2%、+61.2%之间变化。对于 RCP 4.5 和 RCP 8.5，Bega 和 Belg 季节平均季节性降雨量变化的预期下降范围分别为 -69.6% 至 88.4%，以及 -60.6% 至 15.2%。气候模型预测，Kiremt 季节的平均周期性降水量将在 -12.1% 至 1.33% 之间变化。Belg、Kiremt 和 Bega 季节的平均季节性降水量可能分别减少 28.2%、12.2% 和 22.6%。上述气候情景（RCP 4.5 和 RCP 8.5）伴随的溪流流量减少可分别高达 19.6% 和 6.7%。此外，由于流域降雨量大幅减少和蒸散量增加，近期排放量将会减少。河流流量的下降对未来水资源的可用性有其自身的影响。该研究结果对于环保部门、决策者和科学界在降雨稀缺地区采取气候变化适应技术至关重要。一项与多 RCM 相结合的项目旨在评估气候变化对水文气象的影响，为这项研究提供了一种新的方法，并具有适当的适应机制。