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千岛湖水体叶绿素浓度高光谱遥感监测研究初报
引用本文:刘英,王珂,周斌,许红卫,沈掌泉.千岛湖水体叶绿素浓度高光谱遥感监测研究初报[J].浙江大学学报(农业与生命科学版),2003,29(6):621-626.
作者姓名:刘英  王珂  周斌  许红卫  沈掌泉
作者单位:1. 浙江大学,农业遥感与信息技术应用研究所,浙江,杭州,310029;郑州航空工业管理学院,建筑工程管理系,河南,郑州,450015
2. 浙江大学,农业遥感与信息技术应用研究所,浙江,杭州,310029
基金项目:韩国HD.eIMAGE公司和杭州市环保局资助项目(H2001011705).
摘    要:以千岛湖为研究对象,利用高光谱地物光谱仪在库区进行了反射光谱测量和同步水质采样分析.通过研究水体藻类叶绿素浓度与其高光谱反射特征之间的关系,建立了叶绿素a的遥感定量模型, 结果表明:光谱反射率比值R701 nm/R516 nm、IKONOS的红光与蓝光波段反射率之比与叶绿素a线性相关程度都比较高,决定系数分别为0.87和0.83,可以用来估计叶绿素a浓度;而微分光谱、单波段以及其它波段比与叶绿素a的相关性不及前两者.所以,遥感估算千岛湖叶绿素a浓度,采用比值法最准确.由于TM波段与IKONOS波段范围几乎完全相同,而分辨率不同,从经济实用的角度考虑,可以用TM数据对整个库区进行大范围遥感监测,而对其支流和小范围水面,用分辨率较高的IKONOS数据才能满足精度要求.

关 键 词:千岛湖  叶绿素a  高光谱  遥感
文章编号:1008-9209(2003)06-0621-06
修稿时间:2003年1月4日

Preliminary study on hyperspectral remote sensing of Qiandao Lake chlorophyll-a concentration
LIU Ying.Preliminary study on hyperspectral remote sensing of Qiandao Lake chlorophyll-a concentration[J].Journal of Zhejiang University(Agriculture & Life Sciences),2003,29(6):621-626.
Authors:LIU Ying
Abstract:Qiandao Lake is the biggest freshwater reservoir of Zhejiang Province .This study was conducted to establish correlations between reflectance and concentration of chlorophyll-a in Qiandao Lake. Reflectance spectra was measured on July 4, 2001 using Fieldspec radiometer. Extensive water quality sampling was carried out simultaneously with the spectral data collection. The features of the spectral reflectance of the lake water were discussed. The reflectance ratio of R_(701nm)/R_(516nm) was found to be significantly correlated with the concentration of chlorophyll-a. It was also found that the correlation between the concentration of chlorophyll-a and the reflectance ratio of red/blue band of IKONOS data was also high, so it is possible to monitor the water quality of Qiandao Lake using remote sensing data.
Keywords:Qiandao Lake  chlorophyll-a  hyperspectral  remote sensing
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