Satellite analysis for flowing mechanism of the Inbanuma
Abstract
The Lake Inbanuma, northwest of the Chiba Pref., was selected as a suitable study site for water quality assessment through the spectral characteristics of water region. In this lake, long term and chronic pollution has been reported and fo cused, and discharging lake water down to two diversion channel for purification, therefore, has been periodically attempted by the open-and-shut of several plural sluice gates. Two lakes at there represent a complex situation for major optical constituents and emergent spectral signals for remote sensing and provide a good test of combined radiometric correction methods developed for evaluating oil spilled ocean, turbid inland lakes and reservoirs. By repetitious lab. experiments and "synch. site surveying" of lake water, we encountered the following significant range; red reflectance absorbtion was appeared the portion between 625 and 675nm, and NIR peak was also appeared that near 720nm. Both were diagnostically useful for assessing relative Chlorophyll-a level. Based upon those factors, original set of TM band data was digitally rectificated by original developed combined radiometric correction processing. As a result, the complicated flowing patterns resulted from the "open-and-shut" of two sluice gates were visualized by the time-series distribution imageries by Transformed TM image processing.
- Publication:
-
34th COSPAR Scientific Assembly
- Pub Date:
- 2002
- Bibcode:
- 2002cosp...34E.323I