碩士 / 國立成功大學 / 地球科學系碩博士班 / 94 / Due to high elevation and precipitation of Taiwanese landscape, the land erodes rapidly. The eroded sediments being transported downward by river streams towards estuary, where it discharge into the ocean. The interaction between erosion and transportation of the eroded materials plays an important role in controlling the sand content and turbidity of waters. In the pass, the Suspended Sediment Concentration (SSC) was measured manually; it is sometimes unreliable due to data are gathered by different space and time; moreover, it is time consuming and costy. When obtaining these data by satellite imaging, it will provide us a much more consistant data in time, and cheaper in cost. To achieve this goal, one must attempt to correlate the satellite information with the actual SSC in the real time, the feasibility and accuracy of their relationship is need to be validated.
The objective of this research is attempting to establish the relation between actual SSC and turbidity with different wavelength data from high-resolution optical satellite images. Three different type of satellite data are used: In-situ sample data, high resolution satellite image, and the simulate experiments. The in situ spectrum sampled with GER 1500 Spectrummeter, was separated into three wavelengths based on SPOT satellite wave bands G, R, and N-IR bands; each were studied between the actual SSC, turbidity and seawater reflectance on the date. After regression analysis between DN value from SPOT image and spectrum signal, the relative connection parameters to the SSC and turbidity was established.
The results show that SSC is considerably correlated t the SPOT satellite R band of the in situ spectrum data with correlation coefficient of 0.8626; and the turbidity is considerably correlated to the SPOT satellite G band of the in situ spectrum data, with the correlation coefficient of 0.7204.
| Identifer | oai:union.ndltd.org:TW/094NCKU5135013 |
| Date | January 2006 |
| Creators | Meng-Hsun Lin, 林孟勳 |
| Contributors | Ting-Do Yu, Ching-Liang Tseng, 余騰鐸, 曾清凉 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 88 |
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