摘要
水质遥感监测方法可以反映水质在空间和时间上的分布情况和变化,满足目前对水质调查实时、大尺度的评价要求。文章以云南抚仙湖星云湖为研究区,将实测的叶绿素a浓度、悬浮物含量和MODIS遥感数据各波段比值进行相关分析,结果表明:MODIS数据250m分辨率的r2/r1的波段组合能够较好地反演叶绿素a浓度,而500m分辨率的(r4-r3)/(r4+r3)的波段组合对于悬浮物浓度的反演能力最好。通过对它们进行回归关系分析,得到适合抚仙湖星云湖的遥感定量模型。
Remote sensing monitoring of water quality is capable of showing the distribution and variation of water quality in space and time and meets the demand of large-scale and real-time water quality assessment. In this paper, the spectral characteristics of Fuxian and Xingyun Lakes water are studied by analyzing the field spectra measurements. The observed of Chlorophyll-a （Chl-a） concentration, Suspended Sediment （SS） concentration and MODIS band combination were compared. The results show that the ratio of band 2 to band 1 （ r2/r1 ） with 250 m resolution is suitable to retrieve Chl-a concentration, while the proportion of sum-difference band 4 to band 3 （r4- r3）/（r4 ＋ r3） with 500 m resolution is related closely to SS concentration. Utilizing the best band combinations, semi-empirical retrieval models for Chl-a, the SS concentrations are composed in the Fuxian and Xingyun Lakes.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2008年第5期92-96,105,共6页
Hydrogeology & Engineering Geology
关键词
MODIS数据
叶绿素A
悬浮物
抚仙湖星云湖
MODIS image data
chlorophyll-a
suspended sediment
Fuxian and Xingyun Lakes
