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Evaluation method of drip irrigation uniformity

An evaluation method and a technology for uniformity, applied in the field of farmland water conservancy, can solve the problems of less research, the selection of sampling points and the number of samples are not clearly specified, and the transformation of irrigation spatial scale has not been effectively solved. Accurate evaluation of irrigation water utilization coefficient and the effect of improving water-saving efficiency of drip irrigation

Active Publication Date: 2015-06-03
SHIHEZI UNIVERSITY
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Problems solved by technology

The spatial distribution of soil moisture is mainly indicated by the relationship between the dripper flow and the wetting body. At present, for drip irrigation, most studies focus on the characteristics of the soil wetting body under the dripper point source irrigation, and there are few studies on the field scale and line source or area source. The drip irrigation project has not effectively solved the problem of spatial scale conversion in irrigation. At the same time, for the calculation of uniformity, the selection of the location of the sampling point and the number of samples have not been clearly stipulated.

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  • Evaluation method of drip irrigation uniformity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] refer to figure 1 , a drip irrigation irrigation uniformity evaluation method is characterized in that comprising the following steps:

[0050] (1) A drip irrigation test was carried out at No. 1 station of the fruit company in Shihezi City, Xinjiang, and the field part of the drip irrigation land was randomly selected. This part included at least three continuous drip irrigation belts, namely drip irrigation belt A7, drip irrigation belt B6, and drip irrigation belt C5;

[0051] (2) Choose irrigation uniformity rectangular measurement center 1, the selection method of described rectangular measurement center 1 is: take the drip irrigation belt B6 center point as the measurement area center point, by the center line between the drip irrigation belt A7, the drip irrigation belt B6 and the drip irrigation belt B6, the center line between the drip irrigation belt C5 is used as two of the wide side lines 9 of the rectangular measurement center 1, perpendicular to the drip i...

Embodiment 2

[0068] A drip irrigation irrigation uniformity evaluation method is characterized in that comprising the following steps:

[0069] (1) Located in the second horticultural field of the 13th Division of Xinjiang Production and Construction Corps, Hongxing 1st, jujube drip irrigation experiments were carried out, and the field part of the drip irrigation land was randomly selected. This part includes at least three continuous drip irrigation belts, namely drip irrigation belt A and drip irrigation belt B. , drip irrigation belt C;

[0070] (2) Select the irrigation uniformity rectangular measurement center, the selection method of the rectangular measurement center is: use the center point of the drip irrigation belt B as the center point of the measurement area, by the center line between the drip irrigation belt A, the drip irrigation belt B and the drip irrigation belt B, The center line between the drip irrigation belt C is used as one of the two wide side lines of the rectan...

Embodiment 3

[0088] Compared with Example 1, the difference of this example is that the experimental site is located in Shihezi 122 group, and the salt drainage drip irrigation test is carried out, and the irrigation area is irrigated, and the irrigation time is 24h; after the irrigation is completed, under natural conditions, the soil Infiltration 18h;

[0089] The test measured 8 points, the maximum water content at different depths was 23%, and the minimum water content was 0%. Calculate the average values ​​of the same depth at each point (0, 20, 40, 60, and 80 cm in sequence) to be 1.55%, 14.36%, 13.03%, 16.13%, and 20.38%, so calculate the standard deviation of each point at the same depth (0, 20, 40, 60, 80cm in turn) are 1.41%, 1.38%, 1.35%, 1.77%, 1.80%, and the s values ​​are all less than 2%, so it is judged that the level of drip irrigation in the test area is "it is good".

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Abstract

The invention relates to the field of irrigation and water conservancy, and an evaluation method of drip irrigation uniformity. The evaluation method comprises the following steps: randomly selecting a field part of land for drip irrigation, selecting a rectangular measurement center of irrigation uniformity; uniformly setting eight soil moisture measurement points around a sideline of the rectangular measurement center; irrigating the irrigation area; measuring the soil moisture of a position 0-80 cm below each moisture measurement point 2 respectively, performing the measurement once every 20 cm in depth; calculating a standard deviation s of the soil moisture at different depths of 0 cm, 20 cm, 40 cm, 60 cm and 80 cm respectively; evaluating the drip irrigation uniformity according to the standard deviation s of the soil moisture, wherein the evaluation grade comprises four grades of being excellent, good, common and poor. The evaluation method is simple and convenient in operation, economical and practical, the provided irrigation water utilization coefficient evaluation is relatively accurate, and the water-saving efficiency of drip irrigation is further improved.

Description

technical field [0001] The invention relates to the field of farmland water conservancy, in particular to a method for evaluating the uniformity of drip irrigation. Background technique [0002] Xinjiang is located in the hinterland of the Eurasian continent, away from the ocean and surrounded by high mountains. It has a typical temperate continental climate. The annual precipitation is 190 mm, which is a quarter of the national average rainfall. It is the area with the least precipitation in the country. In addition, the climate is dry. , strong evaporation, uneven temporal and spatial distribution of water resources, and water resource shortages are more prominent. According to statistics, Xinjiang is short of about 5.4 billion m of water every year 3 , of which water shortage for agricultural irrigation accounts for about 3.2 billion m 3 . Xinjiang's unique geographical environment determines that water-saving irrigation technology is the fundamental way to solve agricu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/02
Inventor 刘洪光叶建威何新林张杰阿尔娜古丽龚萍葛阳田海博刘昭希史尚渝
Owner SHIHEZI UNIVERSITY
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