1997 Fiscal Year Final Research Report Summary
Study on the River-Channel Change by Satellite Image Processing
| Project/Area Number |
08650604
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
水工水理学
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| Research Institution | Wakayama University |
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Principal Investigator |
UTAMI Tadashi Wakayama Univ., Faculty of Systems Engineering, Professor, システム工学部, 教授 (00027244)
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| Co-Investigator(Kenkyū-buntansha) |
UENO Tetsuo Kyoto Univ., DPRI,Instructor, 防災研究所, 助手 (70027267)
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| Project Period (FY) |
1996 – 1997
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| Keywords | Satellite Images / Image Processing / Braided Channel / Meandering Channel / Channel Sihft / Channel Change |
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| Research Abstract |
1. Study on the Analyzing Method of Satellite Images
In order to survey the channel shifts of large rivers, the method to superpose two satellite images was developed ; By correlating photo-density distributions over small areas around some static points in one satellite image to those in another image, relative shift distances, rotation angles and the enlargement factor between these two images were calculated.
2. Study on the Channel Changes of Large Rivers
By using above method, satellite images taken at different times were compared each other, and river channel changes of the Brahmaputra, Meghna and Gangis in Bangladesh at each time were examined. As the results it was clarified that the river is comprised of braided regions and meandering regions and each region sifts downstream as time passes.
The shifting velocities of meandering phase of each channel and those of regions were also examined.
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