This study examines the effect of climate variability on water resource management during droughts. We use data from local droughts in Japan over three decades to investigate how variability in precipitation and temperature affects water restrictions implemented by drought coordination councils. We find that climate variability is significantly related to water restrictions in terms of both intensity and duration. The regression results show that a 100-mm decrease in annual precipitation is associated with a 0.2% increase in the water withdrawal restriction rate and an increase of one day in the restriction period. Our findings suggest that climate variability might induce more stringent water restrictions, implying negative consequences for water availability. This study thus shows the importance of strategically building adaptive capacity to climate change due to the risks of extreme weather events, such as prolonged droughts and extended summer seasons.

中文翻译：

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气候多变性对干旱管理的影响：来自日本流域的证据

这项研究探讨了干旱期间气候变化对水资源管理的影响。我们使用来自日本过去三十年的干旱数据，调查降水和温度的变化如何影响干旱协调委员会实施的水资源限制。我们发现，就强度和持续时间而言，气候变异性与水限制显着相关。回归结果表明，年降水量减少100 mm会导致取水限制率增加0.2％，限制期增加一天。我们的研究结果表明，气候多变性可能会导致更严格的用水限制，这意味着对水资源可用性的负面影响。