RIVER FLOW CONTROL METHOD Russian patent published in 2007 - IPC E02B3/02 

FIELD: hydraulic structures and water industry, particularly for river stream usage to provide centralized industrial and drinking water-supply for reliable water intake from river characterized by bad stream conditions.

SUBSTANCE: method involves accumulating water in head river during high-water periods; discharge the accumulated water in main river in low-water periods in regime providing favorable water intake structure operations and amount of water to be supplied in accordance with necessary water consumption. Water accumulation is carried out by water freezing to create artificial ice mounds at main river inflows. To create artificial ice mounds heat-exchangers are installed in transversal sections of river bed at river bottom level. The heat-exchangers are made as air ducts air-tightly connected with vent risers having different heights and communicated with atmosphere. The vent risers are arranged on opposite river banks. Artificial ice mounds are created by pressure increase in inflow beds at heat-exchanger installation sections to provide water flow to low floodplain as temperature decreases below 0°C in autumn period, which results in water freezing. In spring as air temperature increased to positive temperature the ice mounds are thawed under control by heat-exchanger venting efficiency increase or decrease. In this period water additionally freezes onto ice mounds in day periods characterized by negative ambient temperature. Water stream in main river is controlled by ice mound thawing in volume necessary to provide favorable water intake structure operations and amount of water to be supplied in accordance with necessary water consumption.

EFFECT: increased ecological safety.

3 dwg