摘要
悬浮泥沙不仅影响水体的生态状况,而且对河口地貌及岸线的演变起到重要作用.高光谱技术可用于船载、机载及星载的光学传感器上,被认为是监测光学复杂水体的有效工具.为研究高光谱技术在河口悬浮泥沙监测应用中的可行性,于2004年5月及2006年8月,在珠江口进行了两个航次的现场水质采样及同步光谱测量.测量的原始遥感反射率光谱的分辨率为0.38nm,处理成为10 nm的带宽,并进一步处理成导数光谱.以悬浮颗粒物（SPM）表征悬浮泥沙,分析了SPM和各光谱间的相关性.结果显示,一阶导数光谱,特别是605 nm,可用于河口水体的SPM估算.该研究结果可应用到光学复杂河口水体的悬浮泥沙现场监测,并且对Hyperion及环境1号等卫星成像高光谱数据有潜在的应用价值.
Suspended sediments not only influence water quality, but also play an important role in coastline evolution. With the aid of sensors on board buoy, plane and satellite, hyperspectral technique is considered as one promising tool to solve the problems in monitoring optically-complex waters. In order to apply hyperspectral techniques in the in-situ suspended sediment monitoring in estuarine waters, we carried out two cruises in the Pearl River Estuary in May 2004 and August 2006. Water samples were collected at each sampling station simultaneously. The original reflectance spectra with 0.38 nm spectral resolution were re-sampled to 10 nm, and then the first-order and second-order derivative spectra were processed. Correlation analysis was performed between the measured suspended particle matter （SPM） concentrations and each band. The results indicated that first-order derivative spectra, especially at the wavelength of 605 nm, could be used to estimate concentration of SPM at estuarine waters. This suggests a new way for the in-situ suspended sediment measurement and potential application to Hyperion and HJ-1 satellite images in the optically-complex estuarine waters.
出处
《生态科学》
CSCD
2010年第6期563-567,共5页
Ecological Science
基金
广东省自然科学基金重点项目(06105018)
中国科学院知识创新项目(KZCX2-YW-Q07-01)
关键词
高光谱
导数光谱
悬浮泥沙
珠江河口
hyperspectrum
derivative spectrum
suspended sediments
Pearl River Estuary
