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• Improved SWAT model that employs dynamic CO 2 input with an improved Penman formula was used to simulate blue and green water. • Future precipitation and temperature increased across regions and scenarios indicating a trend towards warmer and wetter conditions. • Excessively high temperature could inhibit vegetation growth, affecting the conversion and distribution patterns of blue and green water in the basin. • During extreme warm-dry events, a significant conversion of blue water to green water occurs in most parts of the basin. River basin water supplies are changing significantly as a result of global climate change. Therefore, it is crucial to examine the spatial and temporal variations of blue and green water (BW and GW) in future contexts. This research focuses on the Jialing River Basin, utilizing an enhanced Soil however, extremely high temperatures can hinder vegetation development, impacting the transformation and allocation of blue and green water within the basin. (4) In most areas of the basin, extreme heat and dryness lead to a notable shift from blue water to green water, linked to soil moisture buildup prior to drought conditions. Despite the suppression of vegetation activity due to elevated CO 2 and high temperatures in future scenarios, increased vegetation growth demands in agricultural areas exacerbate soil water shortages and elevate future risks to water and food security. The findings provide scientific support for comprehensive water resource management of the Jialing River Basin and offer scientific references for water resource allocation and drought response under climate change in the basin.
Wu et al. (Thu,) studied this question.