Method for reversely deducing local inflow based on muskingum method

Abstract

The invention discloses a method for reversely deducing local inflow based on a muskingum method, and relates to the field of hydrological data compilation. The method comprises the following steps: obtaining an upstream station flow path sequence and a downstream station flow sequence, obtaining the measured flow processes of upstream and downstream stations, and calculating to obtain a downstream station estimated flow process by using the muskingum method, and then judging to obtain upstream and downstream station measured flow extremum sequences and a downstream station estimated flow extremum sequence; designing a target function, when the target function f reaches the minimum value fmin, the corresponding qsim being the downstream station outflow estimated flow process, and subtracting the downstream station measured flow process and the downstream station outflow estimated flow process at the same time to obtain an estimated local inflow process of a target reach. The method provided by the invention realizes that the high-precision local inflow process and muskingum coefficient can be obtained by a relatively simple operation in the case of less information.

Description

technical field [0001] The invention relates to the field of hydrological data compilation, in particular to a method for back-estimating interval inflows based on the Muskingum method. Background technique [0002] Currently, in order to study reservoir regulation and water resource management, the collection / estimation of river channel evolution and interval inflow data is one of the essential steps. The widely used channel evolution methods can be divided into hydrodynamic methods and hydrological methods. The hydrodynamic method has high calculation accuracy and clear physical meaning, but requires more data, complex calculation, poor operability and long solution time. However, the Muskingum method, a hydrological channel evolution method adopted by many researchers, has a simple calculation process, requires less data, and its accuracy can meet the needs of general scientific research and engineering. However, the Muskingum method is based on the assumption that the ...

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Problems solved by technology

[0003] However, in some small watersheds, the construction of hydrological stations is not perfect, and some tributaries often lack observation data; or in mountainous watersheds, the inflow during the flash flood period is equal to or exceeds the river runoff flow

At this time, the accuracy of the results obtained by directly applying the Muskingum method for channel routing is low, and it is necessary to reverse the interval inflow

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