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Assessing the combined impacts of wildfire and climate change on blue and green water resources in the Weihe River Basin
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DOI：10.1007/s10668-026-08051-4.png)
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Abstract
En 中文
This study focuses on the coupled impact of wildfires and climate change on BGW resources in the Weihe River Basin(WRB) in China. Based on the Soil and Water Assessment Tool (SWAT), two climate change scenarios (SSP126 and SSP585) and eight wildfire-climate coupled scenarios (Fr1–Fr8) were constructed to systematically analyse the spatiotemporal evolution of blue and green water (BGW) resources. The key findings reveal that, relative to the baseline period (2000–2020), multi-year average blue water (BW) increased by > 55.3% and green water (GW) by > 14.4% across sub-basins under SSP126 during 2030–2050. Under the SSP585 scenario, these increases exceeded 19.8% and 14.8%, respectively.Wildfire and climate coupling scenario simulations indicate that logging and tillage (Fr1) exacerbate the negative impacts of wildfires on BGW, while straw mulching and seeding (Fr3) can mitigate wildfire-derived effects; Post-wildfire sub-basins exhibit lower BGW under SSP585 than under SSP126. Wildfires cause an increase in BW and a decrease in GW, leading to a decline in the Green Water Coefficient (GWC) and the total BGW resources. This study emphasizes the need to incorporate wildfire risks into climate change adaptation strategies, providing scientific basis for optimizing water resource management in the WRB in China.
Keywords:
Soil and Water Assessment Tool (SWAT)
Blue and Green Water (BGW)
Wildfire
Climate change
Green Water Coefficient (GWC)
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4.2
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945
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2.3W
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