摘要
对水体进行准确快速的监测是环境研究的重要需求,也是水资源管理的重要工作。山地水体所处位置地形地貌复杂多变,人工实地调查难度更大,更加需要利用遥感方法来自动提取水体。在分析Landsat8多波段影像中岩石和土壤光谱反射特性的基础上,改进了归一化差分水体指数,提出了山地水体指数。相较于其他水体指数,该指数能有效抑制山地中土壤、岩石和山体阴影的影响,提取效果更好。通过千鹤湖区域山地水体的提取实验证明,利用山地水体指数提取水体的精度更优。
Accurate and rapid water monitoring is an important environmental research requirement and important water management task.The water position in mountainous areas is complicated and varied,and manual field investigation is more difficult,so it is necessary to use remote sensing method to automatically extract water.Based on the rock and soil spectral reflection characteristic analysis in Landsat8 multi-band imag-es,we improved NDWI and proposed NDHWI.Compared with other water indexes,NDHWI can effectively suppress the effects of soil,rock and mountain shadows,and has better mountain water extraction.The water extraction in the Qianhe Lake Area Mountains proves that the NDH-WI-based water extraction accuracy is better.
作者
骈蔚然
张莉
耿晴
PIAN Weiran;ZHANG Li;GENG Qing(College of Earth Exploration Science and Technology,Jilin University,Changchun 130000,China;Hubei Archives of Surveying and Mapping Production,Wuhan 430071,China)
出处
《地理空间信息》
2022年第3期25-29,共5页
Geospatial Information
关键词
水体指数
波谱特征
水体提取
精度分析
water index
spectral characteristic
water extraction
precision analysis
