基于Landsat影像的鄱阳湖面积监测及其与水位关系研究

赵辉, 陈振, 冯超帆, 张通, 赵学晶, 张兆旭

Monitoring of the area of Poyang Lake based on Landsat images and its relationship with the water level

ZHAO Hui, CHEN Zhen, FENG Chaofan, ZHANG Tong, ZHAO Xuejing, ZHANG Zhaoxu

表2 不同模型提取水体的计算公式

Tab.2 Formula of various models for extacting water body

模型 公式① 备注 NDWI NDWI= ( ρ B 2 - ρ B 4 ) / ( ρ B 2 + ρ B 4 ) NDWI>a为水体 MNDWI MNDWI= ( ρ B 2 - ρ B 5 ) / ( ρ B 2 + ρ B 5 ) MNDWI>b为水体 AWEI A W E I = 4 ( ρ B 2 - ρ B 5 ) - ( 0.25 ρ B 4 + 2.75 ρ B 7 ) AWEI>c为水体 SPM S P M = ( ρ B 2 + ρ B 3 ) - ( ρ B 4 + ρ B 5 ) SPM>0为水体