Reconstruction method of hydrological non-uniformity sequences

A consistent and hydrological technology, applied in open-air water source surveys, complex mathematical operations, measurement devices, etc., can solve problems such as changes in statistical characteristics of samples that do not consider climate and human activities, inconsistency, and inability to accurately obtain design results, etc. Achieve the effect of improving reliability, design calculation accuracy, and simple calculation
CN108955652APending Publication Date: 2018-12-07SUN YAT SEN UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUN YAT SEN UNIV
Publication Date
2018-12-07

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Abstract

The invention relates to the technical field of hydrological frequency analysis and more particularly relates to a reconstruction method of hydrological non-uniformity sequences. The reconstruction method comprises the following steps: (S1) collecting actually-measured long sequence flow or water level data of watershed hydrological sites, and adopting an annual maximum method or a super-thresholdmethod to select samples and form a time sequence; (S2) adopting a non-uniformity recognition method to detect the trend and the mutability of the samples; (S3) on the basis of the non-uniformity characteristic of the hydrological time sequences, constructing and screening time change models; (S4) adopting an L moment method to carry out model parameter estimation and design value calculation. The reconstruction method of the hydrological non-uniformity sequences has the beneficial effects that the characteristic of non-uniformity of hydrological extremum sequences under the influence of environmental change is fully considered, and the design result reliability and the design calculation accuracy can be improved, so that the reconstruction method can be widely applied to hydrological statistical calculation.
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Description

technical field

[0001] The invention relates to the technical field of hydrological frequency analysis, and more specifically, to a method for reconstructing hydrological non-consistent sequences. Background technique

[0002] The frequency analysis of extreme hydrological events is based on the extraction of extreme value sequences from the measured sample data, and the frequency statistical analysis method is used to calculate the recurrence period of hydrological events of a certain magnitude. The correct return period estimation is the theoretical basis for the formulation of regional flood control and drainage policies and the construction of engineering measures, and plays an important role in ensuring regional economic and production safety. At present, the design value calculation method for extreme hydrological events mainly has four steps: 1. Extracting extreme value sample sequences; 2. Optimizing the distribution type; 3. Estimating model parameters; 4. Wiring an...

Claims

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