鄱阳湖水动力模型的遥感验证研究

应用湖泊水动力模型EFDC模拟了鄱阳湖2009-2011年的水动力过程。结果表明:模拟日平均水位及流量与水文站观测结果基本一致,相关系数达到0.94以上。针对现场观测数据单一匮乏的问题,借助遥感手段较为全面地验证分析了模型的实用性。通过雷达高度计ENVISAT RA-2和MODIS影像获取的水位、水体面积及淹水范围与模拟结果相关性较好,相关系数均达到0.83以上,证明该模型能够有效地揭示鄱阳湖高动态变化的水动力特征。此外,遥感手段也为模型的多角度长期验证提供了技术依据。

Study on hydrodynamic model validation by remote sensing in Poyang Lake

Hydrodynamic process in Poyang Lake from 2009 to 2011 was simulated by using the lake hydrodynamic model, EFDC. Results showed that simulated daily average water elevation and discharges consisted with hydrologic station observations and the correlation coefficients are all above 0.94.Remote sensing data were employed to validate and analyze the model practicability more comprehensively in order to solve the problem of data deficiencies. The water surface height and inundation area measured by Radar altimeter ENVISAT RA-2 and MODIS images correlated with numerical simulation resultswith a correlation coefficient higher than 0.83, which indicated that thefrequently changingwater dynamic characteristics in Poyang Lakecould be effectively revealed by using EFDC model.Furthermore, remote sensing techniquesalso providedtheory for long-termvalidation from different perspectives.