Base flow division method aiming at semi-humid and semi-arid region and humid region

A technology in semi-arid and regional areas, applied in the direction of genetic models, genetic rules, special data processing applications, etc., to achieve the effect of improving calculation accuracy and improving empirical formulas

Inactive Publication Date: 2017-05-31
JILIN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention provides a baseflow segmentation method for semi-humid, semi-arid and humid areas to solve the engineering problem of baseflow segmentation in hydrogeology

Method used

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  • Base flow division method aiming at semi-humid and semi-arid region and humid region
  • Base flow division method aiming at semi-humid and semi-arid region and humid region
  • Base flow division method aiming at semi-humid and semi-arid region and humid region

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Embodiment Construction

[0075] Include the following steps:

[0076] Step 1, collect data, including daily runoff Q, daily rainfall P and catchment area F, recorded in square kilometers, km 2 ;

[0077] According to the daily runoff data, use the receding curve method to move the standard receding curve to transparent paper, and then cover it on the receding section of the flow process line to be divided. Note that the scale is consistent, the baseline coincides with the time axis, and the left and right The translation makes the tails of the two receding sections coincide, and the moment when the two lines begin to overlap can be used as the termination point of the surface runoff, and the time distance between the termination point of the surface runoff and the moment when the peak flow of the measured flow line appears is N, that is, Average confluence time of post-peak surface runoff, days d; see figure 1 ;

[0078] Taking the N value obtained from the receding curve and the watershed area F o...

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Abstract

The invention relates to a base flow division method aiming at a semi-humid and semi-arid region and a humid region and belongs to the field of base flow division or water source partition in engineering hydrogeology. The base flow division method comprises the following steps: collecting data; calibrating a drainage basin post-peak surface runoff concentration time empirical equation and introducing rainfall intensity; calibrating parameters of an improved empirical equation by adopting a genetic algorithm through a global optimal searching intelligent technology, so as to obtain an optimized empirical equation; and directly calculating drainage basin post-peak surface runoff concentration time N. According to the base flow division method provided by the invention, the disadvantage of a sliding minimum value trial is overcome; and the calculation is simple and convenient, and the accuracy is also improved.

Description

technical field [0001] The invention belongs to the technical field of base flow division or water source division in engineering hydrogeology. Background technique [0002] Baseflow segmentation is an important problem in hydrogeology, and it is of great significance in the simulation of watershed runoff model, watershed hydrological analysis and calculation, regional water resource evaluation and investigation, etc. The base flow segmentation here is to separate the surface runoff and base flow of the river runoff. Runoff refers to the water flow formed by precipitation in a certain catchment area, which generates lateral flow under the action of gravity and collects into the river channel along a certain path. Among them, the water flow collected by the ground is called surface runoff. The flow of water collected in saturated soil layers and rock pores is called underground runoff. Water source division is the basis of baseflow division, and it is also a core basic scie...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06N3/12
CPCG06F30/20G06N3/126
Inventor 李鸿雁鲍珊珊
Owner JILIN UNIV
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