白洋淀上覆水氮磷浓度对沉积物氮磷释放的影响

Influnces of Nutrient Concentration of Overlying Water in Baiyangdian Lake on Nitrogen Release From Sediment

采用实验室静态模拟法,研究了白洋淀上覆水氮磷浓度对沉积物中氮磷释放的影响。结果表明,上覆水浓度对沉积物中氮磷释放速率有较大影响,上覆水浓度越低,营养盐释放速率越快,反之越慢。S曲线可以很好地拟合氮磷营养盐累计释放量的变化趋势,指数衰减动力学模型可以很好地描述氮磷释放速率变化趋势。

By means of staticsimulation method, this artical studied the nitrogen and phosphorus exchange law between interface of sediment and water in Lake Baiyangdian at different concentration of overlying waters. The results showed that nutrient levels of overlying water impacted the release rate significantly. The average release rates were negatively correlated to the nutrient levels of overlying water. Cumulative release process can be well described by Scurve, exponential kinetics model can also meet the release rates trends of nutrients.