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Simulation method of surface flow movement for ground irrigation

A surface irrigation and surface water flow technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as low solution efficiency, complex expressions, and inability to simulate

Active Publication Date: 2016-10-26
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0024] When the existing technology is used to simulate the movement of surface water flow in surface irrigation, although the simulation accuracy of the classic Roe simulation method is high, its expression is extremely complex, resulting in low solution efficiency, and it is impossible to effectively complete the simulation of large-scale surface irrigation water flow movement. simulation of

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  • Simulation method of surface flow movement for ground irrigation
  • Simulation method of surface flow movement for ground irrigation
  • Simulation method of surface flow movement for ground irrigation

Examples

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Embodiment 1

[0117] This embodiment provides a simulation method for surface water flow movement in surface irrigation. Through this simulation method, the movement of surface water flow during ground irrigation in the border fields of the Yehe irrigation area in Hebei Province is simulated. The selected basic situation of the border fields in the Yehe irrigation area of ​​Hebei is : The length of the border is 100m, and the single-width flow rate when the water enters the border field for the first time is 3L / s m measured by the ultrasonic flowmeter, which is used as the initial condition for solving q. The soil infiltration parameter k of the border field measured by the test in 0.00063m / s α , the parameter α of the dimensionless infiltration index is 0.23, and the roughness coefficient n of the border surface obtained by estimating the surface water depth h measured at the border is 0.08s / m 1 / 3 .

[0118] The specific simulation steps are as follows:

[0119] Step 1. Select the total...

Embodiment 2

[0149] This embodiment provides a method for simulating the movement of surface water in surface irrigation. The operation process of this method is the same as that of Embodiment 1, except that:

[0150] The border field used for the test is the border field of the 222 regiment of the Xinjiang Construction Corps. The basic conditions of the border field are as follows: the length of the border field is 150 m, and the single-width flow rate when the water enters the border field for the first time is 6 L / s m measured by the ultrasonic flowmeter (that is, the initial condition of q q 0 =0.006), the water receiving time of the border field is 160min measured by the stopwatch, and the soil infiltration parameter k of the border field is measured by the double-loop seepage test in 0.00016m / s α , the parameter α of the dimensionless infiltration index is 0.42, and the roughness coefficient n of the border surface obtained by estimating the surface water depth h measured at the bor...

Embodiment 3

[0156] This embodiment provides a method for simulating the movement of surface water in surface irrigation. The operation process of this method is the same as that of Embodiment 1, except that:

[0157] The border field used for the test is the border field in the Dupanli irrigation area in Shandong Province. The basic situation of the border field is: the length of the border field is 130m, and the single-width flow rate when the water enters the border field for the first time is 4L / s m measured by the ultrasonic flowmeter (that is, the initial condition of q 0 =0.004), the water receiving time of the border field was measured as 120min by the stopwatch, and the soil infiltration parameter k of the border field was measured by the double-loop seepage test in 0.00026m / s α , the dimensionless infiltration index parameter α is 0.38, and the roughness coefficient n of the border surface is estimated by the measured surface water depth h at the border head to be 0.09s / m 1 / 3 . ...

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Abstract

The invention discloses a simulation method of surface flow movement for ground irrigation, pertaining to the field of ground irrigation. The simulation method comprises following steps: firstly, selecting a full hydrodynamic equation in the vector form as a ground irrigation model for simulation of surface flow movement in target border check ground irrigation; then, carrying out space-time dispersing operation on the full hydrodynamic equation in the vector form in order to obtain a space-time dispersing expression of the full hydrodynamic equation; and representing the space-time dispersing expression as q and h; finally, sorting out the space-time dispersing expression of the full hydrodynamic equation as a surface flow movement simulation equation with q and h as unknown. By solving the equation, q and h at each measuring point in the target border check such that surface flow movement in the target border check for ground irrigation can be simulated. The simulation method is capable of conveniently and easily calculating so that simulation calculation time can be effectively shortened. The method is of high calculation precision and suitable for simulation of surface flow movement for large scale ground irrigation.

Description

technical field [0001] The invention relates to the field of surface irrigation, in particular to a method for simulating surface water flow movement in surface irrigation. Background technique [0002] Surface irrigation is a common method of farmland irrigation. It uses irrigation ditches, furrows or grid fields to introduce water into the farmland, and allows the water to infiltrate the soil under gravity and capillary action to replenish water for field crops. When performing surface irrigation, in order to ensure that the field crops are fully irrigated and save water resources as much as possible, it is necessary to pre-evaluate the irrigation performance of the water flow in the target border field, so as to adjust the irrigation water volume and flow rate, etc., to avoid the waste of water resources . Therefore, it is necessary to provide an evaluation method for surface irrigation. [0003] The prior art provides a method for simulating the movement of surface wat...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 章少辉许迪李益农白美健李福祥
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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