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Title: A study on some climatological parameters influencing the physical environment of the Brahmaputra valley
Researcher: Kalita, Sarbeswar
Guide(s): Sarmah, S K
Keywords: Climatological
University: Gauhati University
Completed Date: 31/12/1984
Abstract: Characteristics of climatological parameters such as wind, rainfall and surface air temperature of the Brahmaputra Valley have been studied by using simple statistical methods. Data for varying periods between 1901 and 1980 from 94 stations, in and around the Brahmaputra Valley, have been used in this study. Major emphasis is given to the study of rainfall. The study of wind direction shows that at the lower levels, wind flow pattern in the Brahmaputra Valley is highly affected by the topography of the region and throughout the year, specially at the surface level prevailing direction of the wind is along the downslope of the valley. The surface wind speed has seasonal variation with its maximum value in the month of April. The wind power output is found to be low in all the valley stations of the region. The characteristics of rainfall that are studied and discussed are areal distribution and diurnal, seasonal and annual variations. The results show that spatial and temporal variations of rainfall in the valley are highly complex refle-cting the complex physiography of the region. A diminishing trend of rainfall is also found in many stations of the valley, which is more prominent in north-eastern part. Mean monthly surface air temperature analysis shows four different types of seasonal variation patterns at different locations in the valley. There is a rising trend of daily maximum, minimum and mean temperatures in majority of the stations. Water balance study shows that about 1068.0 litres/m2/yr. surplus rain water in lost as run off during May to September and a deficit of about 97.2 litres/m2/yr. occurs during October to April, causing drought period. Water balance analysis also shows nine types of climates in the valley although the valley as a whole belongs to a climatic type of third humid second mesothermal with negligible winter water deficiency.
Appears in Departments:Department of Environmental Science

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01_title page.pdfAttached File13.85 kBAdobe PDFView/Open
02_certificate.pdf26.04 kBAdobe PDFView/Open
03_acknowledgement.pdf21.18 kBAdobe PDFView/Open
04_abstract.pdf42.9 kBAdobe PDFView/Open
05_content.pdf76.45 kBAdobe PDFView/Open
06_list of tables.pdf115 kBAdobe PDFView/Open
07_list of appendices.pdf17.08 kBAdobe PDFView/Open
08_list of figures.pdf200.13 kBAdobe PDFView/Open
09_chapter 1.pdf165.97 kBAdobe PDFView/Open
10_chapter 2.pdf962.06 kBAdobe PDFView/Open
11_chapter 3.pdf4.83 MBAdobe PDFView/Open
12_chapter 4.pdf10.84 MBAdobe PDFView/Open
13_chapter 5.pdf1.35 MBAdobe PDFView/Open
14_chapter 6.pdf1.29 MBAdobe PDFView/Open
15_summary.pdf196 kBAdobe PDFView/Open
16_appendix i.pdf85.57 kBAdobe PDFView/Open
17_appendix ii.pdf71.09 kBAdobe PDFView/Open
18_appendix iii.pdf183.74 kBAdobe PDFView/Open
19_appendix iv.pdf17.5 kBAdobe PDFView/Open
20_appendix v.pdf247.45 kBAdobe PDFView/Open
21_appendix vi.pdf158.18 kBAdobe PDFView/Open
22_appendix vii.pdf402.17 kBAdobe PDFView/Open
23_appendix viii.pdf73.53 kBAdobe PDFView/Open
24_bibliography.pdf369.87 kBAdobe PDFView/Open

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