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Proceedings Paper

Monitoring variation of water turbidity and related environmental factors in Poyang Lake National Nature Reserve, China
Author(s): Wei Liu; Yanfang Liu; Chris M. Mannaerts; Guofeng Wu
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Paper Abstract

There are pronounced spatial-temporal patterns in water turbidity in Poyang Lake National Nature Reserve (NNR), China. A most suitable empirical model validated by the field data between Moderate Resolution Imaging Spectroradiometer (MODIS) reflectance and Secchi Disk Depth (SDD) selected as the indicator of water turbidity is used to map the spatio-temporal dynamics. High water transparency values are observed during the summer season, while the most turbid situations always occur in winter. In different years, the trend is similar while the occurrence of detailed peaks is a little different in the same lake. Comparing the situation in different seasons, the most turbid places show in different directions. Different lakes have their specific situations. The turbidity difference in the low-water season is less than the varying in the other seasons. Statistical methods were used to quantify the influence of factors such as water level, wind speed, temperature and rainfall. Further statistic analysis is used to judge the accuracy of the model. Some ancillary environmental factors which can also play a role such as fishing, dredging, vegetation and bird's influence are analyzed by theoretical deduction, supported by field investigations and historical data.

Paper Details

Date Published: 4 September 2007
PDF: 12 pages
Proc. SPIE 6754, Geoinformatics 2007: Geospatial Information Technology and Applications, 67541H (4 September 2007); doi: 10.1117/12.764879
Show Author Affiliations
Wei Liu, Wuhan Univ. (China)
Yanfang Liu, Wuhan Univ. (China)
Chris M. Mannaerts, International Institute for Geo-Information Science and Earth Observation (Netherlands)
Guofeng Wu, Wuhan Univ. (China)

Published in SPIE Proceedings Vol. 6754:
Geoinformatics 2007: Geospatial Information Technology and Applications
Peng Gong; Yongxue Liu, Editor(s)

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