EXPLORING THE IMPACT OF WATER LEVEL VARIATIONS ON MODEL RIVER BANKS COMPOSED OF DIFFERENT SOIL TYPES A FLUME-BASED INVESTIGATION
Abstract
The objective of this study was to explore the pattern of failure and variation of pore water pressure in a river bank model consisting of medium cohesionless soil and silt dominated clay. To create the bank, a flume with dimensions of 550 cm in length, 150 cm in width, and 60 cm in depth was used. The length and depth of bank was 467 and 32 cm, having slope angle 33.64°. In this study, a reduced-scale distorted river modeling approach based on the Froude number was employed. The flume was scaled down by a factor of 1:250, while the depth of the model river bank was scaled down by a factor of 1:20. Two series were used in the study: Series-I and Series-II. For the physical model testing in Series-I, medium cohesionless soil with moisture values of 6% and 13% was taken. In Series-II,10% and 15% water has taken for preparation of silt dominated clay bank. For the model bank (1V:1.5H), the same slope was used in both series. Drawdown of 0.5 and 0.8 times of height were taken in both series (Series-I and Series-II) for this study.
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