Type:

Modeling riverine dissolved and particulate organic carbon fluxes from two small watersheds in the northeastern United States

Journal: Environmental Modelling and Software (18736726)Year: February 2020Volume: 124Issue:

Qi J.Zhang, XuesongLee S.Moglen, Glenn E.Sadeghi A.^aMcCarty G.W.

a :University of Isfahan - IRAN(IR) - Isfahan

BronzeDOI:10.1016/j.envsoft.2019.104601Language: English

Abstract

The coupled carbon (C) cycle across terrestrial and aquatic environments at the watershed scale has been identified as an important, but poorly constrained component of the global carbon budget. Here, we extended Soil and Water Assessment Tool (SWAT) with coupled riverine particulate organic carbon (POC) and dissolved organic carbon (DOC) modules (referred to as SWAT-C hereafter). Results show that SWAT-C reproduced daily POC and DOC fluxes well in two watersheds in the Northeastern United States. We found that SWAT-C tended to underestimate high flows and peak DOC and POC fluxes. Uncertainty analysis indicated flux uncertainties associated with POC and DOC simulations were larger than those for flow simulation. Sensitive parameters controlling POC and DOC biogeochemical processes were identified along with how these parameters influence mechanisms underlying C cycling. We anticipate that the tool developed and applied here will inform C related ecosystem services in watershed assessment and planning. © 2019 Elsevier Ltd

Author Keywords

Aquatic carbon cycleDissolved organic carbonParticulate organic carbonTerrestrial-aquatic ecosystem couplingWatershed

Other Keywords

United StatesAquatic ecosystemsBudget controlDissolutionStream flowUncertainty analysisWatershedsAquatic environmentsBiogeochemical processCarbon cyclesDissolved organic carbonParticulate organic carbonParticulate organic carbon fluxesSoil and water assessment toolWatershed assessmentaquatic ecosystemcarbon cyclecarbon fluxecosystem servicehydrological modelingriverwatershedOrganic carbon