Climate change and wetland loss impacts on a western river's water quality

摘要: An understanding of potential stream water quality conditions under future climate is critical for the sustainability ecosystems and protection human health. Changes in wetland balance projected could alter extent or cause loss (e.g., via increased evapotranspiration lower growing season flows leading to reduced riparian inundation) altered land use patterns. This study assessed climate-induced changes in-stream sediment nutrient loads snowmelt-dominated Sprague River, Oregon, western US. Additionally, impacts combined area climatic were evaluated. The utilized Soil Water Assessment Tool (SWAT) forced with statistical downscaling general circulation model (GCM) data from Coupled Model Intercomparison Project 5 (CMIP5) using Multivariate Adaptive Constructed Analogs (MACA) method. Our findings suggest that, (1) mid-21st century increase significantly during high-flow warmer, wetter projections change only nominally a warmer somewhat drier future; (2) although some scenarios no may be similar past, impact losses on large; (3) increases total phosphorus (TP) concentration would greatest at high-magnitude, low-probability flows; (4) wetlands both headwaters lowlands outlet TP degree, but this due distinctly different mechanisms parts watershed.