Design method of tidal river flood control and tidal protection coastline

Abstract

The invention discloses a tide-sensing river channel flood prevention and moisture prevention shoreline making method, and belongs to the technical field of flood prevention and moisture prevention foundation water conservancy facilities. The method is based on actually measured river channel terrain and hydrology sediment materials, a river channel physical model and a mathematical model are established, the mathematical model comprises a two-dimensional mathematical model and a three-dimensional mathematical model, and the river channel physical model, the two-dimensional mathematical modeland the three-dimensional mathematical model are carrying out digital-to-analogue coupling; and according to hydrodynamic characteristics under different regional tidal currents and different workingconditions, water force of a river channel field, change rule of flow velocity gradient, distribution rule a water power curve, erosion and silting process of a riverbed and a form of ultimate erosionand silting are under the long-time action of the river flood and the outer sea boundary at different frequencies are achieved, and a shoreline conforming to a natural river tidal flooding intersection movement rule is formulated. The tide-sensing river channel flood prevention and moisture prevention shoreline making method has the advantages that the defect that in traditional shoreline making,the flood power function is considered independently and the long-term effect of the tidal power is ignored are broken through, and the adaptability of a combined action area river channel shorelineof a runoff and a tide is enhanced.

Description

technical field [0001] The invention belongs to the technical field of flood and tide control basic water conservancy facilities, and in particular relates to a method for formulating a tidal river channel flood and tide control coastline. Background technique [0002] The lower reaches of rivers are generally affected by both river runoff and ocean tides at the same time. The water flow is not unidirectional but reciprocating periodically. The water level process line also presents the shape of high and low tides. Therefore, how to accurately delineate the shoreline utilization area and the shoreline control line has become the primary problem to be solved in the riverside shoreline utilization planning. Velocity gradient is an important parameter to quantify the secondary flow characteristics of the river channel and the law of water energy dissipation, while the water level gradient is closely related to the stability of the river bank and the habitat of the river channel...

AI Technical Summary

Problems solved by technology

The laws of water movement in the lower reaches of rivers are complex, and tidal current physical models and mathematical models are effective means to reveal the laws of hydrodynamics and sediment transport. In the case of a large amount of sand mining on the river channel, the river bed evolves rapidly and violently, making it difficult to accurately verify the model

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