Wang Hong, Appan Adhityan, Gulliver John S
Environmental Quality Assurance Department, Metropolitan Council Environmental Services, 230 East Fifth Street, St Paul, MN 55101-1633, USA.
Water Res. 2003 Sep;37(16):3939-53. doi: 10.1016/S0043-1354(03)00305-1.
A sediment phosphorus model, describing dynamics of organic phosphorus, dissolved reactive phosphorus and exchangeable particulate phosphorus, is applied to five monitoring stations in Chesapeake Bay, USA, to examine model performance in predicting sediment-water phosphorus exchange. The model was fit to 1 year of field measurements, and verified over 3 years at five sampling stations. The results show that the simulated concentrations of phosphorus reasonably correspond to model mechanisms and field observations in both spatial and temporal variations. Predicted release fluxes of phosphorus are consistent with field measurements and improved over those obtained by existing sediment phosphorus models. The model incorporates the effects of dissolved oxygen and non-linear, non-equilibrium sediment sorption in phosphorus dynamics. A sensitivity analysis indicates the importance of the non-linear, non-equilibrium sorption processes to accurate prediction of sediment-water phosphorus flux.
一个描述有机磷、溶解态活性磷和可交换颗粒磷动态变化的沉积物磷模型，被应用于美国切萨皮克湾的五个监测站，以检验该模型在预测沉积物 - 水磷交换方面的性能。该模型与1年的实地测量数据拟合，并在五个采样站进行了3年的验证。结果表明，模拟的磷浓度在时空变化上与模型机制和实地观测结果合理对应。预测的磷释放通量与实地测量结果一致，并且比现有沉积物磷模型得到的结果有所改进。该模型纳入了溶解氧以及磷动态中非线性、非平衡沉积物吸附的影响。敏感性分析表明，非线性、非平衡吸附过程对于准确预测沉积物 - 水磷通量至关重要。
