基于MODIS数据的鄱阳湖总悬浮物浓度监测分析

Monitoring of TSS concentration in Poyang Lake based on MODIS data

为了利用遥感卫星影像资料对湖泊水质进行连续、大范围的监测,以鄱阳湖为研究对象,通过对水体实测高光谱的特征分析,采用分期统计回归的方法建立总悬浮物(TSS)浓度反演模型,利用MOD IS影像反演鄱阳湖TSS浓度的空间分布,并分析其时空分布特征。研究结果表明:红光和近红外波段是反演水质参数TSS的敏感波段,在同一环境下分析,可以有效地减少各种内外因素的影响,提高TSS浓度遥感反演模型的适用性和精度,因此,利用MOD IS数据遥感反演模型监测分析湖水水质是可行的。

In order to monitor the water quality of Poyang Lake by remote satellite image continuously and in a large-scope,through analysis on measured spectrum characteristics of water body and the staged statistic regression analysis,the regression analysis model on total suspended sediment of Poyang Lake was set up and its spatial-temporal TSS concentration distribution was analyzed by the model.The research results showed that red and near infrared bands were TSS sensitive bands,under the same environment,it can effectively reduce the influence of various internal and external factors in the analysis and improve the applicability and accuracy of the model;therefore,and the continuous and large-scoped monitoring on water quality of Poyang Lake can be realized using water quality analysis by MODIS data and the regression model.