River mouth runoff and tide control reach judgement method and application method thereof

Abstract

The invention provides a river mouth runoff and tide control reach judgement method. The method comprises the following steps of selecting runoff and tide characteristic indexes; taking tidal range observation stations as target observation stations, utilizing an M-K method, and when the runoff flow of a runoff observation station is greater than a certain flow level and the occurrence frequency of the flow level in a hydrologic P (as shown in the specification) type curve of the corresponding runoff observation station exceeds 90%: if the fact that UF or UB exceeds a confidence interval a=0.95 always exists, calling reaches of the target tidal range observation stations as perennial runoff control reaches, and otherwise, calling the reaches of the target tidal range observation stations as non-perennial runoff control reaches; and for the target tidal range observation stations of the non-perennial runoff control reaches, judging seasonal runoff control reaches and perennial tide control reaches by utilizing the MK method on the basis of flood season or dry season runoff flows and monthly tidal range data of each station. According to the method provided by the invention, theoretical support is provided for the construction of water conservancy projects, so that the implementation of related projects in river mouth areas has better pertinence for the runoff and tide control conditions.

Description

technical field [0001] The invention belongs to the technical field of water conservancy and water transport engineering, in particular to a method for judging estuary runoff and tidal control river sections and an application method thereof. Background technique [0002] The estuary area is an area where runoff and tides interact. Due to the different periodicity and action characteristics of runoff and tides, there are differences in water and sediment transport, salinity diffusion, and landform changes in the runoff-controlled river section and the tidal-controlled river section. This difference determines the difference in focus between the runoff control section and the tidal control section in the construction of waterway regulation, flood control, and reservoir water intake projects. Existing studies have recognized this problem, and often use mathematical models to calculate the decomposition interface where the salinity is 0 based on the salinity diffusion. Althou...

AI Technical Summary

Problems solved by technology

Existing studies have recognized this problem, and often use mathematical models to calculate the decomposition interface where the salinity is 0 based on the salinity diffusion. Although this method is more intuitive to judge, it has the disadvantages of difficult data collection and complicated calculation process. It is extremely inconvenient to apply patterns in engineering practice

Moreover, due to the short change period of tide and salinity, there will be certain errors in the consideration of long-term project operation, which is not conducive to the implementation of the project and will also increase the economic cost

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