基于EOS/MODIS资料的太湖藻类动态模拟

建立了太湖藻类生长的动态模型,并将其与水动力模型和水质模型相耦合,利用2001年7～8月太湖的实测资料对模型进行了率定。借助该模型,对2004年8月太湖水体中TN、TP的变化以及藻类生长过程进行了模拟。利用中分辨率成像光谱仪EOS/MODIS的数据对太湖叶绿素a浓度进行遥感定量,将遥感监测数据和模型计算结果进行了比较。结果表明:该模型可进行风生湖流、TN、TP的模拟,以叶绿素a浓度描述的藻类浓度的模拟值能较好地拟合遥感监测值,且遥感监测图和模型模拟图所反映的全太湖叶绿素浓度分布基本一致。最后根据遥感和模拟对太湖全区的藻类分布作了具体的分析。

Dynamic Simulation of Algae in Taihu Lake Based on EOS/MODIS Data

A dynamic model of algae growth was established for Taihu Lake,which coupled with hydrodynamic model and water quality model.The numerical model was calibrated based on monitoring data of the Lake from July to August in 2001.Water quality including TN and TP as well as growth of algae in August 2004 was simulated with the model.Chlorophyll-a concentration was determined by use of moderate resolution imaging spectroradiometer-EOS/MODIS data,and was compared with remote sensing monitoring data.Results indicated that the calculated wind current,TN and TP and modeled concentration of algae described by chlorophyll-a concentration was in well accordance with the monitoring data,chlorophyll-a concentration distribution reflected from remote sensing monitoring chart and model simulating chart was also in accordance.