Author/Authors :
Lee، J نويسنده Department of Environmental Science, Shaanxi Normal University, Xi’an Shaanxi 710062, P. R. China , , Zhang، H نويسنده Department of Environmental Science, Shaanxi Normal University, Xi’an Shaanxi 710062, P. R. China , , Liu، Y نويسنده Department of Environmental Science, Shaanxi Normal University, Xi’an Shaanxi 710062, P. R. China , , Liu، X نويسنده Department of Environmental Science, Shaanxi Normal University, Xi’an Shaanxi 710062, P. R. China , , Miao، G نويسنده Department of Environmental Science, Shaanxi Normal University, Xi’an Shaanxi 710062, P. R. China ,
Abstract :
Approach of organic material anaerobic biodegradation and species of organic matter in sediment
are discussed, and then a classifying method of the species is proposed on a new viewpoint. The pore water
sediment oxygen demand (SOD) numerical model in bottom sediment system is proposed originally, which
differs from other advection-dispersion-sorption (ADS) model in adding a SOD-creating term. The model was
preliminarily validated via pilot experiment. Finally, this model was used to simulate SOD concentration of
pore water in bottom sediment, and the sensitivity of parameters in the model was analyzed. The results
indicate that SOD-creating factor at beginning stage and pore water SOD-attenuating factor in bottom sediment
are the most important coefficients in the new model and should be estimated accurately. Because of the
assumption of equilibrium of sorption/desorption, the new model appears to be valid only with less than 5 m/
d vertical velocity of pore water.
