Irrigation system with irrigation furrow

 

The invention relates to surface irrigation furrow and is intended for continuous irrigation of crops sowing. The irrigation system includes a local distributor, sprinklers, flow furrow irrigation, stormwater overflow tank, the manifold for the discharge of drainage and storm water. For irrigation of agricultural crops continuous planting on irrigated land with slopes in the range from 0.004 to 0.007 flow irrigation furrows made by the bottom width of from 0.13 to 0.15 M. the Width of the grooves on the top from 0.23 to 0.25 m depth from 0.10 to 0.12 m, and the width of the spacing of 0.60 m In the irrigated plot with gradients i0,004 irrigation furrows made by the bottom width of from 0.23 to 0.25 m in width on top of from 0.33 to 0.35 m, depth from 0.09 to 0.11 m inter-row spacing of 0.90 m Excess horizon irrigation jet over the crest of a furrow in the range of 0.02 to 0.03 m Ensures uniform wetting of the root system narrow-row crops especially in the initial stage of their development. 2 Il.

The invention relates to surface irrigation furrow and is intended for irrigation of crops continuous harvest of perennial grasses, wheat, etc.,) in the irrigated plot with a slope of less than 0,007 and can be used in different soil-Melia is 0.24 m flooded with water along the entire length of approximately 2/3 of their depth, used mainly for irrigation of wide-row crops. Water through the bottom and soaked part of the slopes is absorbed into the soil and hydrates (1).

This kind of soil moisture is not sufficient for narrow-row crops (e.g. wheat), especially in the initial stage of plant development when their root system is not developed. For this reason, the agricultural culture of continuous sowing irrigated mainly surface irrigation by flooding on stripes.

However, many years of experience in irrigation of these crops by the overlap of the bands in the irrigated areas having a slope less than 0,007 showed that the irrigation norm in these conditions increases dramatically and reaches up to 2000 m3/ha and more, which leads to a significant loss of scarce irrigation water (2).

The objective of the invention is to reduce irrigation rates when watering crops continuous planting in the irrigated areas with slopes less than 0,007, which is achieved by applying flooded flowing irrigation furrows.

The solution of this problem is achieved by the fact that the irrigation system with irrigation furrow, including local distributor, sprinklers, flow furrow irrigation, stormwater overflow tank, the manifold for the discharge of drainage and storm water, according to the x from 0.004 to 0.007 flow irrigation furrows made by the bottom width of from 0.13 to 0.15 m, width on top from 0.23 to 0.25 m depth from 0.10 to 0.12 m wide row spacing of 0.60 m, and in the irrigated plot i0,004 flow irrigation furrows made by the bottom width of from 0.23 to 0.25 m, width at the top from 0.33 to 0.35 m, a depth of from 0.09 to 0.11 m wide row spacing of 0.90 m, to ensure excess horizon irrigation jet over the crest of a furrow in the range of 0.02 to 0.03 m

When making a request adopted the following conventions: Qb- irrigation consumption produced in the irrigation furrow, m3/c; qb- the specific consumption of grooves defined by the formula: db=Qb/bB.cfm3/(cm) where bbcf- the average width of the grooves (in the plane problem), m; bitem Cis the calculated width of the front irrigation streams (inter-row spacing), m; Nb- exceeding the horizon irrigation jet above the bottom of the grooves defined by the graph of the limit values of specific consumption (3), which is developed according to the results of many years of experience crop is irrigated continuous planting, m; tb- the desired depth of irrigation furrows, m ; 1p. I- the length of the furrow (irrigation tier), m; vb- speed jet irrigation in the groove defined by the formula:
vb=db/Nbm/s;
Z - >them;
m - irrigation depth, m3/ha;
i is the slope of irrigated land.

Calculations show that reducing irrigation rates is due to the increase in specific consumption and, accordingly, the hydraulic gradient and flow velocity jet irrigation in flooded irrigation furrow. So, for example, on irrigated land with slopes in the range from 0.004 to 0.007 in irrigated flow Qb=0,002 m3/s produced in the furrow with a bottom width of from 0.13 to 0.15, width at the top from 0.23 to 0.25 m depth from 0.10 to 0.12 m, the specific consumption of grooves increases to values of qb=0.01 m3/(cm) and velocity of the jet increases with v= 0,054 m/s (at watering of the bands) to vb- 0,072 m/s, and irrigation rate would reduce to m=463 m3/ha vs. m=926 m3/ha under irrigation by flooding on stripes, i.e. 2 times. And in the irrigated plot with gradients i0,004 when irrigation flow rate Qb=0,002 m3/s produced in the furrow with a bottom width of from 0.23 to 0.25 m, width at the top from 0.33 to 0.35 m, a depth of from 0.09 to 0.11 m, the specific consumption of furrows qb=0,0067, the stream velocity vb=0,053 m/s, and irrigation rate would reduce to m=418 m3/ha vs. m= 1181 m3/ha under irrigation by flooding on stripes.

On che furrows for irrigation of crops continuous sowing: (a) on the slope of 0.004<i0,007; b) on slopes i0,004 in Fig.1.

Irrigation system, shown in the drawings, includes a district distributor 1; fill up to 1 km 2: irrigation tube 3 diameter 0,04 0,06...m installed in the dam fill every 0.6 or 0.9 m (4) depending on the slope of irrigated land: with slopes in the range from 0.004 to 0.007 and with slopes i0,004; flooded irrigation furrows 4 length up to 500 m, the bottom width of from 0.13 to 0.15 m, width at the top from 0.23 to 0.25 m depth from 0.10 to 0.12 m, the width of the spacing of 0.60 m at the slope of 0.004<i0,007 and the bottom width of from 0.23 to 0.25 m, width at the top from 0.33 to 0.35 m, a depth of from 0.09 to 0.11 m, the width of the spacing of 0.90 m with slopes i0,004; manifold for discharge of drainage and stormwater 5 and stormwater overflow tank 6.

The system works as follows.

Water from the precinct of the distributor 1 is supplied by gravity to fill 2 and then through the irrigation tube 3 in flooded irrigation furrows 4. The process of irrigation along with moisturizing the bottom and slopes of irrigation furrows moistened and their crests, which are flooded with water up to 0.03 m, which ensures a more uniform wetting of the root system narrow culos, 1979. - 303 S., Il. (Textbooks for the high. C.-H. textbook. institutions).

2. Shtepa B., irrigation of cereal and fodder crops. Uzgiprovodkhoz, Rostov-on-don, 1978.3


Claims

Irrigation system with irrigation furrow, including local distributor, sprinklers, flow furrow irrigation the stormwater overflow tank, the manifold for the discharge of drainage and storm water, characterized in that for irrigation of agricultural crops continuous planting on irrigated land with slopes in the range from 0.004 to 0.007 flow irrigation furrows made by the bottom width of from 0.13 to 0.15 m, width at the top from 0.23 to 0.25 m depth from 0.10 to 0.12 m, the width of the spacing of 0.60 m, and in the irrigated plot with gradients i0,004 flow irrigation furrows made by the bottom width of from 0.23 to 0.25 m, width at the top from 0.33 to 0.35 m, a depth of from 0.09 to 0.11 m, the width of the spacing of 0.90 m to ensure excess horizon irrigation jet over the crest of a furrow in the range of 0.02 to 0.03 m

 

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