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

Pending Publication Date: 2018-12-07
SUN YAT SEN UNIV +1
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Problems solved by technology

In general, the existing design value calculation methods do not consider the changes in the statistical characteristics of samples caused by climate and human activities, and even do not belong to the same population, that is, the problem of inconsistency
There are deviations between the calculation results obtained by using the existing design calculation methods and the changing reality, resulting in the inability to accurately obtain the design results

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  • Reconstruction method of hydrological non-uniformity sequences

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[0046] The accompanying drawings are for illustrative purposes only, and should not be construed as limitations on this patent; in order to better illustrate this embodiment, certain components in the accompanying drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art It is understandable that some well-known structures and descriptions thereof may be omitted in the drawings. The positional relationship described in the drawings is for illustrative purposes only, and should not be construed as a limitation on this patent.

[0047] Such as figure 1 As shown, a hydrological inconsistency sequence reconstruction method includes the following steps:

[0048] Step 1. Collect long-term flow or water level data measured by hydrological stations in the basin, and use the annual maximum method or the threshold-exceeding method to select samples to form a time series;

[0049] S11. Determine the sampling method....

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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.

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...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C13/00G06F17/15G06F17/18
CPCG01C13/00G06F17/15G06F17/18
Inventor 陈晓宏唐亦汉叶长青张建云
Owner SUN YAT SEN UNIV
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