The impacts of climate changes on watershed streamflow and total dissolved nitrogen in Danjiang Watershed, China

Abstract The impacts of future climate change on the watershed streamflow and total dissolved nitrogen (TDN) fluxes upstream Danjiang River were estimated. newest shared socioeconomic pathways (SSP) in CMIP6 used as a scenario. ensembles downscaled GCM outputs from WorldClim information. A combined modeling approach is proposed, including Long Ashton Research Station Weather Generator (LARS-WG) model weather generator generalized loading function (GWLF) for hydrochemical process scenario analysis. results show that there generally less annual but more TDN flux under scenarios. monthly increased May to July decreased August October. Changes greatest worst uncontrolled SSP 5-85, with 12.1% decrease 2070s 4.82% increase 2090s. This indicates active policies can mitigate impact watersheds. Furthermore, source apportionments agricultural sources will nearly 50% by 2090s, targeted management strategies should be implemented.