کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4687354 | 1635581 | 2007 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Channel braiding and stability of the Brahmaputra River, Bangladesh, since 1967: GIS and remote sensing analyses
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Channel braiding and stability of the Brahmaputra River, Bangladesh, since 1967: GIS and remote sensing analyses Channel braiding and stability of the Brahmaputra River, Bangladesh, since 1967: GIS and remote sensing analyses](/preview/png/4687354.png)
چکیده انگلیسی
Spatial and temporal changes in channel distribution in the large, sandy, braided system of the Brahmaputra River, Bangladesh, were analyzed using satellite images and GIS. Supervised classification of the images within the braided belt, i.e., channels and bars between the bank-lines, provided raster land cover data for 14 different years between 1967 and 2002. The width of the braided-belt, the number and width of channels, the distribution of land cover attributes and land stability change were examined from the data. The results indicate that the recent history of the dynamics of the Brahmaputra can be divided into four phases: 1) the late 1960s to early 1970s, 2) the mid-1970s to early 1980s, 3) the mid-1980s to early 1990s, and 4) the mid-1990s to early 2000s. Spatial distributions of the land cover and channels in Phase 4 were the least complex suggesting a state of dynamic equilibrium. Land cover and channel distributions during Phase 2 were partly less complex indicating quasi-dynamic equilibrium. Phases 1 and 3 can be regarded as transitional phases with more complex conditions. Frequent large floods may have triggered significant changes in the river system during Phases 1 and 3.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geomorphology - Volume 85, Issues 3â4, 30 March 2007, Pages 294-305
Journal: Geomorphology - Volume 85, Issues 3â4, 30 March 2007, Pages 294-305
نویسندگان
T. Takagi, T. Oguchi, J. Matsumoto, M.J. Grossman, M.H. Sarker, M.A. Matin,