Environmental Monitoring and Assessment

, Volume 129, Issue 1, pp 295–308

Assessment of Chlorophyll-a Concentration and Trophic State for Lake Chagan Using Landsat TM and Field Spectral Data

  • Hongtao Duan
  • Yuanzhi Zhang
  • Bai Zhang
  • Kaishan Song
  • Zongming Wang
Article

DOI: 10.1007/s10661-006-9362-y

Cite this article as:
Duan, H., Zhang, Y., Zhang, B. et al. Environ Monit Assess (2007) 129: 295. doi:10.1007/s10661-006-9362-y

Abstract

In this study, we present the digital evaluation of Landsat TM data and field spectral measurements for retrieving chlorophyll-a (chl-a) concentration and trophic state index in Lake Chagan of Northeast China. Chl-a concentration of the lake can be estimated from the band ratio (TM4/TM3) and the field spectral data at 670 nm (absorption peak) and at 700 nm (reflectance peak). The results show that the best determination coefficient (R2) is 0.67 from the TM data, by which chl-a distribution can be mapped. Based on chl-a determination from laboratory analysis, field spectral and TM data, the modified trophic state index (TSIM) was applied to assess the lake’s trophic state. With the available data in Lake Chagan, each algorithm demonstrates the similar result for assessing the lake’s chl-a and trophic state. Our results indicate that Landsat TM and field spectral data could be used effectively to determine chl-a concentration and evaluate the trophic state of Lake Chagan in the study.

Keywords

Chl-aTrophic stateSpectral measurementsLandsat TM

Copyright information

© Springer Science + Business Media B.V. 2006

Authors and Affiliations

  • Hongtao Duan
    • 1
    • 2
  • Yuanzhi Zhang
    • 3
  • Bai Zhang
    • 1
  • Kaishan Song
    • 1
  • Zongming Wang
    • 1
  1. 1.Northeast Institute of Geography and Agricultural EcologyChinese Academy of SciencesChangchunChina
  2. 2.Graduate School of Chinese Academy of SciencesBeijingChina
  3. 3.Laboratory of Space TechnologyHelsinki University of TechnologyEspooFinland