The management of common-pool resources requires collective action and cooperation, especially when resource users face extreme weather events. This study examines collective decision making in water resource management during droughts. By focusing on the drought response by groups of water users in river basin communities in Japan, we investigate the determinants of collective decisions on water withdrawal restrictions. Our results show that water user groups are more willing to cooperate for water conservation when other water user groups in a community also cooperate. This suggests that the level of cooperation in drought management depends on other water user groups' cooperation. The findings contribute to a better understanding of collective action in water management, which is also informative to improve adaptive capacity to climate change.

公共池资源的管理需要集体行动与合作，尤其是当资源用户面临极端天气事件时。本研究探讨了干旱期间水资源管理中的集体决策。通过关注日本河流流域社区中用水户群体的干旱响应，我们研究了关于取水限制的集体决策的决定因素。我们的结果表明，当社区中的其他用水户群体也合作时，用水户群体更愿意为节约用水进行合作。这表明干旱管理方面的合作水平取决于其他用水户群体的合作。这些发现有助于更好地了解水管理中的集体行动，