鄱阳湖区域夏冬季节沉积物面积变化分析研究

为更好地研究河流污染、河道阻塞、土壤沙化和湖泊面积锐减等问题,本文采用适宜的分析模型和高分辨率资源一号卫星影像,按照影像预处理、影像分类、矢量提取、特征分析的作业步骤,利用面向对象的遥感影像分类方法进行信息提取,针对夏冬两季的地物特征分别对鄱阳湖地区进行沉积物识别、地物类别判读以及湖泊的面积变化分析。研究表明:夏季鄱阳湖区域水体面积较大,泥沙较少,而冬季湖泊面积减少,泥沙等沉积物增多,并且存在相互影响的关系。

The Analysis Research of Poyang Lake Sediment Area Change in the Winter and Summer

In recent years, river pollution, congestion, soil desertification and lake area in issues stand out.We take the Poyang Lake area as the study area.In this paper, we carried out the area of sediment recognition, ground objects identification and changes of the lake area analysis by getting the high resolution images of Poyang Lake area.We take the ZY-1 04 satellite data of Poyang Lake area as the primary data and extract information by means of supervised classification and unsupervised classification.The study area is extracted information by different characteristics of ground objects in the summer and winter.And we analyze the changes of area by the conversion between raster and vector.The whole process can be divided into four parts, image preprocessing, image classification, vector analysis, feature analysis.Through the above steps, we found in Poyang Lake area water is larger in summer and the sediment is less, while in winter lakes area reduced and sediment increased.The research achievements of this paper provide a basis for Poyang Lake area to carry out the project.