Drought has been frequently occurring in South Korea due to climate change. Analyzing the water supply capacity of the water resource system provides essential information for water resource management. This study evaluates the future water supply capacity of the Gwanghye (GH) agricultural reservoir based on the representative concentration pathways 4.5 and 8.5 climate change scenarios. We performed a reservoir simulation by reflecting the full water level of the reservoir before and after reservoir heightening. Climate change is expected to decrease the GH reservoir’s future available water resources due to the overall reduction in the reservoir’s runoff. After the reservoir-heightening project, an overall improvement was observed in the stability of the future irrigation water supply. Moreover, the remaining water after the supply of the irrigation water could supply 0.6–7.2 × 10³ m³ of daily instream water. Thus, flexible reservoir operations are necessary according to climate change scenarios and the reservoir operation period. The use of climate change information should be expanded to establish reasonable water management policies for future climate change scenarios.

中文翻译：

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评估未来气候变化对韩国农业水库的影响

由于气候变化，韩国经常发生干旱。分析水资源系统的供水能力为水资源管理提供重要信息。本研究基于代表性浓度路径 4.5 和 8.5 气候变化情景，评估了光惠 (GH) 农业水库的未来供水能力。我们通过反映水库加高前后水库的全水位来进行水库模拟。由于水库径流总体减少，气候变化预计将减少 GH 水库未来可用的水资源。水库加高工程实施后，未来灌溉供水的稳定性总体上有所改善。而且，³ m ³每日入流水。因此，根据气候变化情景和水库运行周期，灵活的水库运行是必要的。应扩大气候变化信息的使用，为未来的气候变化情景制定合理的水资源管理政策。