A new simulation evaluation method for hydrological models based on multi-scale theory

Abstract

The invention discloses a novel hydrological model simulation evaluation method based on a multi-scale theory, and aims to improve the simulation precision of a watershed hydrological model. The method mainly comprises the following steps: 1) carrying out multi-fractal feature verification on a simulation time sequence and an actual measurement time sequence; And 2) analyzing the simulation effectof the hydrological model through multiple fractal spectrums. The method has the beneficial effects that the correlation between the hydrological simulation result and the measured data can be evaluated; The correlation of each part (high flow, medium flow and low flow) in the sequence can be directly given; The defects of traditional correlation analysis in sequence fractal feature analysis canbe overcome; Fractal characteristics of a hydrological model result can be fully explored, model calibration is more effective, hydrological simulation precision can be remarkably improved, and prediction reliability of the hydrological simulation precision is improved.

Description

technical field [0001] The invention relates to the technical field of hydrological models, in particular to a new method for simulating and evaluating hydrological models based on multi-scale theory. Background technique [0002] Fractal refers to the similarity between the whole and the part, that is, self-similarity. In the field of data analysis, if the data has similar distribution rules at different scales, it is said to have fractal characteristics. Fractal analysis began with the Rescaled range analysis, R / S method proposed by hydrologist Hurst (1951). Fractal phenomena (self-similarity) are widespread in nature, especially in hydrology. The time series of river flow is an example with fractal characteristics. When using the basin hydrological model to simulate the hydrological process, it is of great significance to correctly reflect the fractal characteristics of the hydrological process to improve the simulation accuracy and improve the efficiency of water reso...

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Problems solved by technology

[0004] In order to make up for the deficiency of the traditional hydrological model evaluation index, the purpose of the present invention is to provide a new hydrological model simulation evaluation method based on multi-scale theory, to make up for the traditional hydrological model evaluation index ignoring the hydrological sequence fractal feature (self-similarity), affected by Issues such as extreme values ​​have a large impact

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