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Watershed-scale hydrological nonconformity diagnosis method

A diagnostic method and consistent technology, applied in the direction of instruments, complex mathematical operations, climate change adaptation, etc., can solve problems that are one-sided, cannot be ignored, and untrue

Active Publication Date: 2017-04-26
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • 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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Embodiment 1

[0033] This embodiment is a watershed-scale hydrological inconsistency diagnosis method, and the steps of the method are as follows:

[0034] Steps of establishing a basin non-uniform index system: it is used to screen out index sequences representing various development characteristics of various hydrological processes, and classify and combine them according to the level of index-element-target. The index sequence can extract time series. hydrological indicators. According to the hydrological characteristics of the basin and the aspects that need to be considered in the diagnosis, and considering the availability of data sources, select and select representative and important development characteristic indicators, 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 features include time, space, frequency, intensity, etc., and the elements include precipit...

Embodiment 2

[0063] This embodiment is an improvement of the first embodiment, and is a refinement of the steps of the first embodiment about establishing a watershed non-uniform index system. The steps of establishing a watershed non-uniform index system described in this embodiment include the following sub-steps:

[0064] Select the diagnostic object. First, select the diagnostic objects according to the needs. These diagnostic objects should be elements that can be recorded through time series. The time series has a certain length (the sample is not less than 30), and has a direct impact on certain political, economic and social development or effects, such as rainfall, runoff, groundwater, water quality, urban water demand, etc.

[0065] Identify diagnostic features. The features to be diagnosed are determined according to the diagnostic object, and the diagnostic features are some continuously changing parameters and the like. As hydrological variables, precipitation and runoff th...

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 indicators according to the tree structure of target layer-element layer-indicator layer, such as figure 2 shown.

[0070] The “establishing a regional non-uniform index system” includes from top to bottom: one goal—non-uniformity; the element layer can include multiple elements such as rainfall, runoff, water quality, urban water demand, and ecology; the indicator layer includes multiple elements. Item indicators, such as the average rainfall during the period, continuous rainless days, flood peak flow, runoff frequency, maximum rainfall during the 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 basin-scale hydrological process variability. Background technique [0002] For the diagnosis of hydrological inconsistency at the basin scale, the current technology mainly uses the statistical test of a representative index of the basin to observe whether there is a significant change to diagnose whether the hydrological process in the region is inconsistent. For example, through the statistical test of the annual rainfall cycle, trend, and sudden change point, it can be judged whether the rainfall process in the region has undergone non-uniform changes. Inconsistent changes. Such diagnostic methods are generally based on time series analys...

Claims

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Application Information

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IPC IPC(8): G06Q50/26G06F17/16
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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