Abstract
Laboratory scale models of sewage disposal from submerged diffusers of the wastewater outfalls was carried out in the Large Thermostratified Tank of IAP RAS. It is shown that intensive interaction of internal waves occurs due to the interaction of turbulent buoyant plumes and a region of temperature bound (thermocline) and a stream propagates under a thermocline. A theoretical model of the field of internal waves is constructed for experimentally obtained velocity and density fields. It is demonstrated that the bimodal regime of internal wave excitation takes place with the first mode localized in the thermocline region and the second one in the stream. The mode excitation coefficients can be described well in the framework of self-induced internalwave generation by buoyant plumes.
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