Hydraulic parameters and morphometric variables interactions in bedrock channel
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Date
2016
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Wydział Nauk Geograficznych i Geologicznych Uniwersytetu im. Adama Mickiewicza
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Abstract
Present study is on the interdependent nature of hydraulic parameters and morphometric variables of a bedrock
river. In this study, using dumpy level, GPS, satellite images and some mathematical equations a data set on
hydraulics and morphometric variables of a bedrock channel, named Bhatajhor, of eastern India was generated. That
data set was used to (1) find out impulse-response relations between hydraulic variables (2) find out relations between
morphometric variables and (3) find out relations between hydraulic and morphometric variables. Seven equations
(5–11) were formulated based on this empirical study to the end. The seven empirical relations, most of which include
only two variables, involve channel cross-section dimensions (area, width, mean depth, maximum depth, width/
depth ratio, hydraulic radius), slope and hydraulic variables (velocity, kinetic energy, stream power, Manning’s n factor,
Chezy’s C factor and shear stress). Observation shows relatively higher coefficient of determination (R2) between
variables like velocity and Manning’s n factor (0.67), velocity and Chezy’s C factor (0.67), slope and τ (0.89), w/d ratio
and hydraulic radius (0.53), slope and w/d ratio (0.50).
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Keywords
width/depth ratio, channel slope, hydraulic radius, velocity, stream power
Citation
Quaestiones Geographicae vol. 35 (3), 2016, pp. 75-88