Coherent Structures at the Interface between Water Masses of Confluent Rivers

The paper presents the results of field measurements and numerical modeling influence various factors on formation coherent structures in confluence zone Sylva Chusovaya rivers, which are dammed by Kamskaya Hydroelectric Power Station (HPS). A characteristic feature measured parameters under study is that they experience both seasonal fluctuations much higher frequency associated with intraday regulation HPS operation. These give rise to periodicity T~2–10 min, manifest themselves specific electrical conductivity water. flow velocity also experiences significant a sufficiently wide spectrum, although period its less than equal ~1 min. In order features such structures, simulation was carried out within framework three-dimensional approach. Calculations were performed for 300-meter-long stretch River, located downstream rivers site Chusovskoy water intake Perm city. It found irregularity operation gives occurrence vortex this layer, leading temporal variation concentration at given point space wave structure different moments time. Time spatial scale depend ratio velocities masses difference their mineralization and, accordingly, densities. Moreover, proportional velocities. estimations fundamental importance implementation stable selective required consumer properties conditions hydroelectric power station