基于时间序列MODIS影像的鄱阳湖丰水期悬浮泥沙浓度反演及变化

被引:17
作者
邬国锋 [1 ]
崔丽娟 [2 ]
纪伟涛 [3 ]
机构
[1] 武汉大学资源与环境科学学院,教育部地理信息系统重点实验室
[2] 中国林业科学研究院林业研究所,国家林业局林木培育重点实验室
[3] 鄱阳湖国家级自然保护区管理局
关键词
鄱阳湖; MODIS; 悬浮泥沙浓度; 反演; 变化分析;
D O I
暂无
中图分类号
P343.3 [湖泊、水库];
学科分类号
081501 ;
摘要
悬浮泥沙浓度是描述水质的重要参数之一,获得其在空间和时间上的分布信息对于理解、管理和保护湖泊生态系统是必要的.此研究旨在建立基于中分辨率成像光谱仪(MODIS)影像的鄱阳湖悬浮泥沙浓度反演模型,并利用建立的模型反演2000-2007年鄱阳湖丰水期的悬浮泥沙浓度,分析其在时间和空间上的变化特征并对引起这些变化的原因进行讨论.研究结果揭示:MODISTerra影像红波段与悬浮泥沙浓度具有显著的相关性(R2=0.92,s.e.=12.02mg/L,F=154.30,P<0.001),可以用于鄱阳湖丰水期悬浮泥沙浓度的反演;自2000-2007年间,鄱阳湖悬浮泥沙浓度呈明显的时间和空间分布特征,在南部水体悬浮泥沙浓度无明显变化,在北部呈增加趋势,而中部水体泥沙浓度波动较大;鄱阳湖北部的采砂活动是导致此区域悬浮泥沙浓度增加的主要原因,其与长江江水倒灌鄱阳湖共同作用引起鄱阳湖中部泥沙浓度的波动,抚河、信江和饶河输沙量的非显著变化也导致南部鄱阳湖水体悬浮泥沙浓度的非显著变化.
引用
收藏
页码:288 / 297
页数:10
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