| Summary: | 碩士 === 逢甲大學 === 環境資訊科技研究所 === 95 === There are more than half important reservoirs appear the phenomenon of eutrophication, and the main influence factor is the man-made pollution in Taiwan, and the water quality is progressively getting worse and worse.Traditional water quality monitoring wastes a lot of labor power to sampling, and it takes times to examine samples after sampling. Such a monitoring method like this is not only time-consuming but also laborious, hence the number of samples are not many. And it can only obtain some form types, it is unable to carry on to the fully water quality monitoring. RS is breaking through the tradition limits, and it can obtain image data regularly in a large-scale. It also allow to recall previous data any time. The purpose of this study is to research the capabilities of utilizing RS for water quality monitoring.
The subject of this thesis is about SunMoon-Lake、Mingde Dam、Fongshan Dam, the three reservoirs that suffered oligotrophic and then mesotrophic. I took samples from these tree reservoirs and the synchronized pictures from FORMOSAT 2. Comparing the parameters (Secchi Disk、chlorophyll A、Total Phosphate) of sample water and the pixel’s reflectance values of the pictures from FORMOSAT 2 by the locations to find out the relationship of the satellite pictures and the water qualities. That can estimate the water qualities of the researched area. Also, this paper discuss about the possibility of using FORMOSAT 2 to monitor the water quality of oligotrophic, mesotrophic, and eutriohic reservoirs.
The research found that the degree of accuracy of the estimations of sampling and estimate of Secchi Disk、chlorophyll A、Total Phosphate in these three reservoirs is higher than 90% by the regression of appropriate parameters. The Secchi Disks of the three reservoirs can estimate the appropriate regression. The degree of accuracy of Secchi Disks in Fongshan Dam is as high as 99.4%. That proves that using FORMOSAT 2 can estimate the appropriate regression of Secchi Disks of the reservoirs with different degrees of eutriohic.
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