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):3928-38. doi: 10.1016/S0043-1354(03)00304-X.
A model is developed to study the phosphorus dynamics in aquatic sediments and to conduct dynamic predictions of phosphorus release across a sediment-water interface. The model focuses on the sediment active layer below the sediment-water interface and is based on primary mechanisms regulating phosphorus behavior in sediments, including effective diffusion, bioturbation mixing and burial processes (transport), organic decomposition, sorption kinetic processes and non-linear partitioning (mobilization). The effects of environmental factors such as dissolved oxygen and temperature are taken into account. The model is solved by numerical integration. The primary difference from models in the literature is that the model directly describes the dynamic behavior of dissolved, particulate exchangeable ortho-phosphorus and organic phosphorus in sediments, and incorporates dynamic sorption and non-linear partitioning processes. These improve model mechanisms and allow regulation of phosphorus flux through the sediment reservoir that acts as both a source and sink of phosphorus.
开发了一个模型，用于研究水生沉积物中的磷动态，并对沉积物-水界面的磷释放进行动态预测。该模型聚焦于沉积物-水界面以下的沉积物活性层，并基于调节沉积物中磷行为的主要机制，包括有效扩散、生物扰动混合和埋藏过程（输运）、有机分解、吸附动力学过程和非线性分配（迁移）。考虑了溶解氧和温度等环境因素的影响。该模型通过数值积分求解。与文献中的模型的主要区别在于，该模型直接描述了沉积物中溶解态、颗粒态可交换正磷酸盐和有机磷的动态行为，并纳入了动态吸附和非线性分配过程。这些改进了模型机制，并允许通过作为磷源和汇的沉积物库来调节磷通量。
