Modelling of pH and inorganic carbon speciation in estuaries using the composition of the river and seawater end members

摘要: An equilibrium model based on the CO"2 system was developed to pH throughout estuarine salinity range using composition of river and seawater end members. In order validate model, a spectrophotometric method used measure in an estuary laboratory mixing experiments. The successfully represented measured values (+/-0.1 units) for three different water member compositions. decreased at low salinities (S ~ 0-2), increased intermediate 2-15), then stabilised higher values. Changes inorganic carbon speciation region estuaries result assimilation borne CO"2"("a"q").