Level inversion in stratified lowland reservoirs and the intensification of currents within the water body |
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| Authors: | V N Zyryanov |
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| Institution: | (1) Water Problems Institute, Russian Academy of Sciences, ul. Gubkina 3, Moscow, 119333, Russia |
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| Abstract: | The effect of the formation of reverse slope of water level in stratified reservoirs and the appearance of current velocity peak within the water body are described. Velocity profiles with a peak within the flow have been recorded in experiments at relatively small vertical density gradients; therefore, the stratification alone is not enough to cause such effect. The wind as a cause of this effect is also ruled out. An important part in this problem is shown to belong to the effect of reservoir morphometry on the interrelated behavior of the free surface and the interfaces between layers. It is shown that, at a constant transit flow, the free surface in a stratified reservoir may be a nonmonotonic function decreasing in the general direction of transit flow and inversions in the level curve can appear, i.e., an inverse level course with an inverse slope of the free surface may form. Velocity profiles with an inflection point and a peak in underlying layers form in such cases. |
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