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Hydrological situation evaluation method considering hydrological index distribution rules

A technology of hydrological situation and evaluation method, applied in the direction of data processing application, instrument, calculation, etc., to achieve the effect of reasonable support

Active Publication Date: 2017-08-25
SHANDONG UNIV
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Problems solved by technology

[0005] In summary, there are many studies on the hydrological regime index system, especially for the characteristics of different river basins, and corresponding index systems have been constructed, while the evaluation methods are less concerned with the characteristics of the distribution of hydrological sub-indices, and the changes in the hydrological regime are studied.

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  • Hydrological situation evaluation method considering hydrological index distribution rules
  • Hydrological situation evaluation method considering hydrological index distribution rules
  • Hydrological situation evaluation method considering hydrological index distribution rules

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[0079] 1 Determination of the optimal probability density function

[0080] The daily runoff data of Xiaoqinghe Huangtaiqiao Station from 1960 to 2014 were selected, and 33 hydrological indicators of IHA5 group were calculated. According to the principle of maximum entropy, through Matlab programming, the parameter values ​​of the probability density functions of the four distribution types of the indicators in the two periods are calculated. The calculation results are shown in Table 3 and Table 4.

[0081] Table 3 Probability density function parameter values ​​of four distributions in ecological good period

[0082]

[0083]

[0084] Table 4 Probability density function parameter values ​​of the four distributions during the impact period of urbanization

[0085]

[0086]

[0087] According to the minimum information entropy formula in Table 2, the goodness of fit of the density functions of the IHA indicators in the two periods was calculated. For the statisti...

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Abstract

The invention discloses a hydrological situation evaluation method considering hydrological index distribution rules. The method comprises steps that an IHA is selected as an index system for evaluating river hydrological situation change; the maximum entropy principle and the minimum information entropy are utilized to select a probability density function consistent with hydrological rules; an index change degree is represented through difference of shannon entropy of each IHA component index in two periods; multi-attribute decision-making weighing is utilized to calculate weight of diversity change consistent with hydrological indexes; after each index weight is acquired through calculation, a change degree of each index multiplies corresponding index weight, summation is carried out to acquire an integral change degree of all the indexes, namely, a hydrological situation change degree considering hydrological distribution is acquired. The hydrological change degree is evaluated with pertinence, and more reasonable support is provided for local water resource management departments.

Description

technical field [0001] The invention relates to the technical field of hydrological situation analysis, in particular to a hydrological situation evaluation method considering the distribution law of hydrological indicators. Background technique [0002] As an important factor affecting river ecology, hydrological regime has been paid more and more attention to its index system and evaluation methods. [0003] In terms of the construction of the hydrological regime indicator system, Richard B.D. et al. proposed the IHA indicator system (Indicators of Hydrologic Alteration, IHA) in 1996. Ecological structure information, through the analysis of the ecological and hydrological characteristics of the Roanoke River, it was found that the river had a great change in the ecological and hydrological characteristics before and after the construction of the dam; Growsn et al. extended the IHA in 2000 and proposed a set of seven types The indicator system composed of 333 indicators, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/26
CPCG06Q10/06393G06Q50/26
Inventor 曹升乐刘阳杨裕恒
Owner SHANDONG UNIV
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