Formation of regulable channels in the black sea coast of the caucasus

Conclusions

• 1. An analysis of natural channel processes by constructing the relations characterizing them is obligatory when preparing projects for river channel regulation by means of embankments on both sides. The relations should be established from explorations.

• 2. The width at the narrowest section of the natural channel, formed in the absence of limiting factors, should be regarded as the optimum width for a regulated channel provided that the flow controlled by the channel embankments has the same specific energy and drag force as in the natural channel.

• 3. For free passage of the bed load, the inlet connection between the controlled and natural channel should in plan and longitudinal profile reproduce the natural narrowing of the channel. The channel mouth should be constructed by adhering to the similarity to the natural widening of the channel, both in plan and in the vertical sections.

Should the need arise for further reduction of the width of the controlled channel with respect to the natural minimum width, the hydraulic elements of the regulated flow can be established by extrapolation of the full-scale relations h=f(B) and h=f(v). However, it is advisable to verify the reliability of the extrapolation by hydraulic modeling.