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您的检索式：作者名="Barham PARKASH"
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| 1 | CHANGES IN CHANNEL PATTERN OF RIVER GANGA BETWEEN MUSTAFABAD AND RAJMAHAL, GANGETIC PLAINS SINCE 18TH CENTURY显示文摘Morphological analyses require quantitative description of river course by providing its equation. Such an equation is not possible as the river plan-form contains loops that cannot be described by it. To circumvent this difficulty a system of parametric equations is devised for describing the river plan-form.The system of equations was used to obtain morphological attributes like sinuosity and curvature. Using the plan-form data for the River Ganga for years 1780, 1828, 1853, 1935 and 1978 the parametric equations were setup for these years. The plan-forms were to study the changes in channel pattern,sinuosities and mode of movement of meander loops with time in the last two centuries and in the downstream direction in the Ganga River between Mustafabad and Rajmahal over about 900 km long course. | Prabhata K. SWAMEE Barham PARKASH Jayaprakash V THOMAS Satvindar SINGH | 2003 | International Journal of Sediment Research2003，18，3： | 3 |
| 2 | SPATIAL AND TEMPORAL CHANGES IN THE BRAHMAPUTRA RIVER BED显示文摘A mathematical model based on data for the period 1957-1988 representing changes in space and time in the bed morphology of the 623 km long alluvial reach of the Brahmaputra River in Assam State, India has been developed. This model reveals that in the upper reaches the bed level decreases downstream exponentially with distance from a reference point, while in the lower reaches the exponential decrease is at a smaller rate probably due to differences in tectonic setting. The lower reach is marked by sinusoidal oscillations with a time period of about 9 yr. High runoff in 1977 seems to have caused a significant change as the maximum, average, and minimum bed level were decreasing before 1977 and these increased just after 1977 and then started decreasing at a lower rate than before. Smaller changes in shorter reaches governed by input of discharge and sediment from tributaries are superimposed on the overall degradation/aggradation character. The variation in degradation/aggradation with time is sinusoidal with a wavelength of 4,450 km before 1977 that reduces to about 1,038 km after 1977. | Prabhata K. SWAMEE Barham PARKASH Santanu SARMA | 2006 | International Journal of Sediment Research2006，21，2： | 0 |
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