摘要
Landsat TM/ETM+影像具有时空分辨率高(16 d,30 m)的特点,并且水体信息丰富,被广泛用于水体提取和水资源实时监测。近年来,构建水体指数是Landsat TM/ETM+影像提取水体信息成熟有效的方法。从现有水体提取指数出发,以鄱阳湖地区作为试验区,构建综合权重水体指数(Comprehensive weight water index,CWWI)。通过实验,利用归一化水体指数(NDWI)、新型水体指数(NWI)、改进的归一化水体指数(MNDWI)和综合权重水体指数(CWWI)四种水体指数进行鄱阳湖地区的水体提取,影像整体水体提取的精度分别为89.00%,91.00%,90.50%,93.00%。结果表明,综合权重水体指数能够用于进行水体提取,并且水体提取综合精度最高。
Because Landsat TM/ETM ＋ images has merits of short update cycle and high spatial resolution characteristics,and abundant water body information,it is widely used in water extraction and real-time monitoring of water resources. In recent years,building water index to extract water body information is an effective method for Landsat TM/ETM ＋ images. According to analyze existing water index,a new index named comprehensive weight water index（ CWWI） is proposed to extract water body information in Poyang Lake. Four water index NDWI,MNDWI,NWI,CWWI were used in Poyang Lake water body extraction,and water extraction accuracy were89. 00%,91. 00%,90. 50%,93. 00%. The results show that the comprehensive weight water index（ CWWI）can be used for water extraction and its water extraction comprehensive accuracy is highest.
出处
《东华理工大学学报（自然科学版）》
CAS
2015年第2期206-211,共6页
Journal of East China University of Technology(Natural Science)
基金
国家自然科学基金(41401437)
江西省教育厅科技项目(KJLD12077)
