Climate Change Impacts on US Water Quality using two Models: HAWQS and US Basins
Citation:
Climate Change Impacts on US Water Quality using two Models: HAWQS and US Basins. WATER. MDPI, Basel, Switzerland.
Impact/Purpose:
Estimate the impacts of climate change on water quality in the contiguous U.S.
Description:
Climate change and freshwater quality are well-linked. Changes in climate result in changes in streamflow and rising water temperatures, which impact biochemical reaction rates and increase stratification in lakes and reservoirs. Using two water quality modeling systems (the Hydrologic and Water Quality System; HAWQS and US Basins), five climate models, and two greenhouse gas (GHG) mitigation policies, we assess future water quality in the continental U.S. to 2100 considering four water quality parameters: water temperature, dissolved oxygen, total nitrogen, and total phosphorus. Once these parameters are aggregated into a water quality index, we find that, while the water quality models differ under the baseline, there is more agreement between future projections.