A watershed-scale hydrological inconsistency diagnosis method

A diagnostic method, a consistent technology, applied in instrumentation, complex mathematical operations, climate change adaptation, etc., and can solve problems such as one-sided, non-negligible, unreal, etc.

Active Publication Date: 2018-07-31
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the hydrological model simulates the hydrological elements in different scenarios, it generally assumes that some elements remain unchanged, and considers the influence of other variables on the hydrological process. However, there are many external factors that affect the water cycle process, and the influence factors The cross effect is very complex and cannot be ignored, so although the water cycle process simulated in this way can reflect the influence of some influencing factors on the water cycle process to a certain extent, it is still one-sided and unreal

Method used

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  • A watershed-scale hydrological inconsistency diagnosis method
  • A watershed-scale hydrological inconsistency diagnosis method
  • A watershed-scale hydrological inconsistency diagnosis method

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Experimental program
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Embodiment 1

[0033] This embodiment is a method for diagnosing hydrological inconsistency at the basin scale, and the steps of the method are as follows:

[0034] Steps for establishing a watershed non-consistent index system: used to screen out index sequences representing the development characteristics of various hydrological processes, and classify and combine them according to the level of index-element-target. The index series can extract time series hydrological indicators. Aiming at the hydrological characteristics of the watershed and the aspects that need to be considered in diagnosis, and considering the availability of data sources, select representative indicators of important development characteristics, and classify and combine them according to the level of indicators-elements-targets. The indicators here can be any hydrological indicators that can extract time series. The characteristics include time, space, frequency, intensity, etc., and the elements include precipitatio...

Embodiment 2

[0063] This embodiment is an improvement of the first embodiment, and it is a refinement of the steps of the first embodiment on establishing the watershed inconsistency index system. The step of establishing the non-consistent indicator system of the river basin described in this embodiment includes the following sub-steps:

[0064] Select the diagnostic object. First, select diagnostic objects according to the needs. These diagnostic objects should be elements that can be recorded through time series. Effects, such as rainfall, runoff, groundwater, water quality, urban water demand, etc.

[0065] Determine diagnostic features. The characteristics to be diagnosed are determined according to the diagnosis object, and the diagnosis characteristics are some continuously changing parameters and the like. Precipitation and runoff, as hydrological variables, have time and space characteristics, and in the process of human utilization of water resources, they are given characteri...

Embodiment 3

[0069] This embodiment is an improvement of the second embodiment, and is a refinement of the index system of the second embodiment. The indicator system described in this embodiment classifies and combines the indicators according to the tree structure of target layer-element layer-index layer, such as figure 2 shown.

[0070] The above-mentioned "establishing a regional non-consistent index system" includes from top to bottom: one goal—inconsistency degree; the element layer can be multiple elements such as rainfall, runoff, water quality, urban water demand, ecology, etc.; the index layer includes multiple elements Indicators, such as the average rainfall in time period, consecutive rainless days, peak flow, runoff frequency, maximum rainfall in time period, etc.

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Abstract

The invention relates to a watershed-scale hydrological nonconformity diagnosis method. The method includes the following steps that: a watershed non-uniform indicator system is built; nonconformity diagnosis is performed on single indicator sequences; and watershed hydrological nonconformity quantitative diagnosis is performed. According to the method, the indicator sequences representing the developmental characteristics of hydrological processes are screened out, and the indicator sequences are classified and combined according to an indicator-element-target level; whether the sequences are in trend variation states or jump variation states can be judged on the whole; after nonconformity diagnosis is performed on each single indicator sequence, comprehensive nonconformity diagnosis is performed on each indicator, and therefore, defects in corresponding aspects in the prior art can be avoided; and nonconformity judgment is performed on the plurality of indicators with the same standard, and therefore, theoretical support can be provided for a plurality of kinds of application, such as water resource diagnosis, reservoir dispatching, water conservancy engineering design, flood control and fight against drought.

Description

technical field [0001] The invention relates to a watershed-scale hydrological inconsistency diagnosis method, which is a hydrological calculation method, a diagnosis method that can cover multiple elements and multiple indicators, and a diagnosis method based on statistics and hydrological measured data. It is a diagnostic method for the variability of hydrological processes at the basin scale. Background technique [0002] For the diagnosis of hydrological inconsistency at the watershed scale, the current technology mainly uses the statistical test of a representative indicator in the watershed to observe whether there is a significant change to diagnose whether the hydrological process in the area is inconsistent. For example, through the statistical test of the annual rainfall cycle, trend, and mutation point, it is judged whether the rainfall process in the area has inconsistent changes, and through the statistical test of the annual runoff sequence at the outlet of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q50/26
CPCG06F17/16G06Q50/26Y02A10/40
Inventor 赵勇王建华李海红翟家齐章数语何凡肖伟华王丽珍朱永楠王庆明
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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