一种基于Landsat-8的综合性水体指数模型  

A comprehensive water index model based on Landsat-8

作　　者：娄远兴 张显云[1] 王春霞 殷铁耕 普莉兰 LOU Yuanxing;ZHANG Xianyun;WANG Chunxia;YIN Tiegeng;PU Lilan(College of Mining,Guizhou University,Guiyang 550025,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025

出　　处：《海洋测绘》2023年第4期57-61,共5页Hydrographic Surveying and Charting

基　　金：国家自然科学基金(41901225);贵州省省级科技计划(黔科合支撑[2022]一般224);贵州大学测绘科学与技术研究生创新基地建设项目(贵大研CXJD[2014]002)。

摘　　要：针对传统水体指数模型在水体提取时易受噪声影响的问题,通过分析水体与非水体在不同波段的波谱特征差异,构建了一种基于遥感卫星Landsat-8的多波段组合的综合性水体指数模型(CWI)。为验证CWI的水体提取性能,选取不同地表覆盖和噪声背景下的4个实验区与其他模型进行对比实验。结果表明:CWI能有效抑制冰雪、裸土、云层、低反射物、以及山体阴影等的辐射干扰,且阈值稳定,总体精度达99.46%,Kappa系数高于99.18%,总体误差小于1.12%;相较于其他水体指数模型,CWI的水体提取精度得到了显著提高。The precise extraction of water bodies is of great significance for both hydrological resource management and natural disaster prevention.Aiming at the vulnerability of the traditional water index model to noise during water extraction,a comprehensive water index model(CWI)based on the multi-band combination of remote sensing satellite Landsat-8 is constructed by analyzing the spectral characteristics differences between water and non-water in different bands.In order to verify the water extraction performance of CWI,four experimental areas with different ground cover and noise backgrounds are selected for comparative experiments with other models.The results show that CWI can effectively suppress the radiation interference of ice and snow,bare soil,clouds,low reflectors,and mountain shadows,and the threshold is stable,the overall accuracy is 99.46%,the kappa coefficient is higher than 99.18%,and the overall error is less than 1.12%.Compared with other water index models,CWI's water extraction accuracy has been significantly improved.

关 键 词：水体提取 多波段组合 辐射干扰 遥感卫星 精度评定 

分 类 号：P237[天文地球—摄影测量与遥感]